Directed synthesis, structure and properties of multifunctional materials

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Directed synthesis, structure and properties of multifunctional materials (en)
Усмерена синтеза, структура и својства мултифункционалних материјала (sr)
Usmerena sinteza, struktura i svojstva multifunkcionalnih materijala (sr_RS)
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Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata

Vujančević, Jelena

(Универзитет у Београду, Технолошко-металуршки факултет, 2020)

TY  - BOOK
AU  - Vujančević, Jelena
PY  - 2020
AB  - Ekološki izvori energije i ekonomične metode prečišćavanja vode i vazduha velika supotreba današnjeg tehnološki razvijenog sveta. Fotoaktivni materijali mogu da obezbede ekološkualternativu fosilnim gorivima kada je u pitanju proizvodnja energije i omoguće saniranje nastalihpromena u životnoj sredini. Naime, fotoaktivni materijali apsorbuju svetlost i tada dolazi dopobuđivanja elektrona, koji su odgovorni za prenos električne struje ili učestvuju u procesurazgradnje zagađujućih materija. Postoji veliki broj fotoaktivnih materijala, među kojima se izdvajaTiO2, kojeg odlikuje hemijska inertnost, otpornost na fotoindukovanu i hemijsku koroziju inetoksičnost. Na fotoaktivnost TiO2 utiču mnogi faktori, kao što su morfologija, kristalna struktura istepen rekombinacije nosilaca naelektrisanja.Cilj ove doktorske disertacije je poboljšanje fotokatalitičke i fotoelektrične aktivnosti TiO2nanocevi. U tu svrhu, TiO2 nanocevi su sintetisane metodom elektrohemijske anodizacije pločicetitana. Ispitivan je uticaj procesnih parametara anodizacije na morfologiju i fotokatalitičku aktivnostnanocevi TiO2 u procesu razgradnje boje. Utvrđeno je da sa porastom napona anodizacije rastuvisina i prečnik nanocevi, što utiče na pomeraj apsorpcione granice ka vidljivom delu spektra i napoboljšanje fotokatalitičke aktivnosti. Određen je uticaj temperature žarenja na kristalnu strukturu,morfologiju i fotokatalitičku aktivnost TiO2 nanocevi. Žarenjem nanocevi na 450 °C dobijena jekristalna modifikacija anatasa sa veoma malim sadržajem faze rutila. Sa daljim porastomtemperature žarenja (600 i 650 °C) uočeno je prisustvo obe faze, anatasa i rutila, u različitimodnosima, a do kompletne transformacije anatasa u rutil došlo je na 700 °C. Pored promenekristalne strukture, uočen je uticaj temperature žarenja na morfologiju nanocevi. Sa povišenjemtemperature žarenja, visina nanocevi se smanjivala, kao i poroznost nanocevi, da bi na 700 °C došlodo kolapsa nanocevne morfologije. Sagledan je uticaj kristalne strukture i morfologije TiO2nanocevi na fotokatalitičku razgradnju boje metil-oranž. Zaključeno je da istovremeno prisustvoanatasa i rutila obezbeđuje bolju fotokatalitičku aktivnost u odnosu na čist anatas i čist rutil.Kako bi se ispitao uticaj dopiranja TiO2 azotom na fotokatalitičku aktivnost, nanocevi TiO2su žarene u atmosferi amonijaka, na temperaturi od 450 °C, pri različitim dužinama žarenja.Ispitivan je uticaj vremena žarenja na količinu i vrstu dopiranja. Uočeno je da žarenje u atmosferiamonijaka, pri različitim vremenima, nije uticalo na morfologiju nanocevi. Hemijska analizapovršine TiO2 nanocevi rendgenskom fotoelektronskom spektroskopijom pokazala je da sa dužimvremenom žarenja opada ukupan sadržaj azota u nanocevima. Osim toga, dužina žarenja uamonijaku je uticala i na prirodu inkorporiranja azota u TiO2. Pri kraćem vremenu žarenja zapaženje veći sadržaj intersticijskog azota, a manji sadržaj supstitucijskog azota. S dužim vremenomžarenja u amonijaku, sadržaj intersticijskog azota opada, dok sadržaj supstitucijskog raste.Apsorpcioni spektri su pokazali da uzorak sa najvećom količinom azota i najvećim sadržajemintersticijskog azota pokazuje najveći pomeraj granice apsorpcije ka većim talasnim dužinama. Istoje uočeno i za fotokatalitičku efikasnost. Najveću fotokatalitičku razgradnju boje postigao je uzorakžaren u amonijaku pri najkraćem vremenu.Dalje istraživanje je išlo u smeru proširenja saznanja o pojedinačnim i kombinovanimuticajima dopiranja azotom i deponovanja kvatnih tačaka neorganskog senzivatora nafotokatalitičku aktivnost TiO2 nanocevi. Zapaženo je da deponovanje kvantnih tačaka CdS nijeuticalo na morfologiju nanocevi, ali je na pojedinim mestima došlo do aglomeracije CdSnanočestica, što je dovelo do zatvaranja otvora nanocevi. Utvrđeno je da je fotokatalitičkaefikasnost azotom dopiranih nanocevi poboljšana nakon deponovanja CdS nanočestica. Najvećufotokatlitiču efikasnost pokazao je uzorak sa najvećim sadržajem ukupnog azota i intersticijskogazota u kombinaciji sa deponovanim CdS nanočesticama...
AB  - Environmental friendly power sources and cost-effective methods for water and airpurification, are a necessity in modern technologically developed world. Photoactive materials canprovide an environmentally friendly alternative to fossil fuels in power production and enable theremediation of changes in the environment. Namely, photoactive materials absorb light, whichexcites electrons that are responsible for generating electricity or participate in the process ofdecomposition of pollutants. There are a large number of photoactive materials, among which TiO2has attracted particular attention, due to its chemical inertness, resistance to photo and chemicalcorrosion and non-toxicity. The photoactivity of TiO2 depends on many factors, such asmorphology, crystal structure and the degree of recombination of charge carriers.The aim of this doctoral dissertation is to improve the photocatalytic and photoelectricactivity of TiO2 nanotubes. For this purpose, TiO2 nanotubes were synthesized by theelectrochemical anodization of a titanium plate. The influence of the anodization process parameterson the morphology and photocatalytic activity of TiO2 nanotubes for color degradation wasinvestigated. It was found that an increased anodization voltage leads to increased heights anddiameters of nanotubes, causing the shift of the absorption limit towards the visible part of thespectrum and the improvement of the photocatalytic activity. The influence of the annealingtemperature on the crystal structure, morphology and the photocatalytic activity of TiO2 nanotubeswas determined. The anatase crystalline modification with a very low rutile phase content wasobtained by annealing nanotubes at 450 °C. When the annealing temperature was further increased(600 and 650 °C), the presence of both phases, anatase and rutile, was observed in different ratios,and the complete transformation of anatase to rutile occurred at 700 °C. Besides the change in thecrystal structure, the influence of the annealing temperature on the morphology of the nanotubeswas observed as well. As the annealing temperature increased, the height and porosity of nanotubesdecreased, so that the nanotube morphology collapsed at 700 °C. The influence of the crystalstructure and morphology of TiO2 nanotubes on the photocatalytic degradation of methyl-orangewas observed. It was concluded that the simultaneous presence of anatase and rutile provides betterphotocatalytic activity than pure anatase and pure rutile.In order to investigate the effect of nitrogen doping of TiO2 on photocatalytic activity, TiO2nanotubes were annealed in an ammonia atmosphere, at a temperature of 450 °C, for differentannealing times. The influence of the annealing time on the amount and type of doping wasinvestigated. It was observed that annealing in an ammonia atmosphere, for different periods, didnot affect the morphology of nanotubes. A chemical analysis of the surface of TiO2 nanotubes by Xray photoelectron spectroscopy showed that the total nitrogen content in nanotubes decreased withlonger annealing times. In addition, the annealing duration in ammonia also influenced the nature ofnitrogen incorporation into TiO2. With a shorter annealing time, a higher content of interstitialnitrogen and a lower amount of substitution nitrogen were observed. With a longer annealing timein ammonia, the amount of interstitial nitrogen decreased, while the substitution nitrogen increased.The absorption spectra showed that the sample with the highest amount of nitrogen and the highestcontent of interstitial nitrogen showed the largest shift towards higher wavelengths. The sameapplies to the photocatalytic efficiency. The greatest photocatalytic degradation of the dye wasachieved in the sample annealed in ammonia for the shortest time.Further research was directed towards expanding the knowledge of individual and combinedeffects of nitrogen doping and deposition of the quantum dots of inorganic sensors on thephotocatalytic activity of TiO2 nanotubes. It was observed that the deposition of CdS quantum dotsdid not affect the morphology of nanotubes, but in some places agglomeration of CdS nanoparticlesoccurred, due to which nanotube openings closed. The photocatalytic efficiency of nitrogen-dopednanotubes was improved after CdS nanoparticle deposition. The sample with the highest amount oftotal nitrogen and interstitial nitrogen in combination with deposited CdS nanoparticles exhibitedthe highest photocatalytic efficiency...
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T1  - Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata
UR  - https://hdl.handle.net/21.15107/rcub_nardus_18222
ER  - 
@phdthesis{
author = "Vujančević, Jelena",
year = "2020",
abstract = "Ekološki izvori energije i ekonomične metode prečišćavanja vode i vazduha velika supotreba današnjeg tehnološki razvijenog sveta. Fotoaktivni materijali mogu da obezbede ekološkualternativu fosilnim gorivima kada je u pitanju proizvodnja energije i omoguće saniranje nastalihpromena u životnoj sredini. Naime, fotoaktivni materijali apsorbuju svetlost i tada dolazi dopobuđivanja elektrona, koji su odgovorni za prenos električne struje ili učestvuju u procesurazgradnje zagađujućih materija. Postoji veliki broj fotoaktivnih materijala, među kojima se izdvajaTiO2, kojeg odlikuje hemijska inertnost, otpornost na fotoindukovanu i hemijsku koroziju inetoksičnost. Na fotoaktivnost TiO2 utiču mnogi faktori, kao što su morfologija, kristalna struktura istepen rekombinacije nosilaca naelektrisanja.Cilj ove doktorske disertacije je poboljšanje fotokatalitičke i fotoelektrične aktivnosti TiO2nanocevi. U tu svrhu, TiO2 nanocevi su sintetisane metodom elektrohemijske anodizacije pločicetitana. Ispitivan je uticaj procesnih parametara anodizacije na morfologiju i fotokatalitičku aktivnostnanocevi TiO2 u procesu razgradnje boje. Utvrđeno je da sa porastom napona anodizacije rastuvisina i prečnik nanocevi, što utiče na pomeraj apsorpcione granice ka vidljivom delu spektra i napoboljšanje fotokatalitičke aktivnosti. Određen je uticaj temperature žarenja na kristalnu strukturu,morfologiju i fotokatalitičku aktivnost TiO2 nanocevi. Žarenjem nanocevi na 450 °C dobijena jekristalna modifikacija anatasa sa veoma malim sadržajem faze rutila. Sa daljim porastomtemperature žarenja (600 i 650 °C) uočeno je prisustvo obe faze, anatasa i rutila, u različitimodnosima, a do kompletne transformacije anatasa u rutil došlo je na 700 °C. Pored promenekristalne strukture, uočen je uticaj temperature žarenja na morfologiju nanocevi. Sa povišenjemtemperature žarenja, visina nanocevi se smanjivala, kao i poroznost nanocevi, da bi na 700 °C došlodo kolapsa nanocevne morfologije. Sagledan je uticaj kristalne strukture i morfologije TiO2nanocevi na fotokatalitičku razgradnju boje metil-oranž. Zaključeno je da istovremeno prisustvoanatasa i rutila obezbeđuje bolju fotokatalitičku aktivnost u odnosu na čist anatas i čist rutil.Kako bi se ispitao uticaj dopiranja TiO2 azotom na fotokatalitičku aktivnost, nanocevi TiO2su žarene u atmosferi amonijaka, na temperaturi od 450 °C, pri različitim dužinama žarenja.Ispitivan je uticaj vremena žarenja na količinu i vrstu dopiranja. Uočeno je da žarenje u atmosferiamonijaka, pri različitim vremenima, nije uticalo na morfologiju nanocevi. Hemijska analizapovršine TiO2 nanocevi rendgenskom fotoelektronskom spektroskopijom pokazala je da sa dužimvremenom žarenja opada ukupan sadržaj azota u nanocevima. Osim toga, dužina žarenja uamonijaku je uticala i na prirodu inkorporiranja azota u TiO2. Pri kraćem vremenu žarenja zapaženje veći sadržaj intersticijskog azota, a manji sadržaj supstitucijskog azota. S dužim vremenomžarenja u amonijaku, sadržaj intersticijskog azota opada, dok sadržaj supstitucijskog raste.Apsorpcioni spektri su pokazali da uzorak sa najvećom količinom azota i najvećim sadržajemintersticijskog azota pokazuje najveći pomeraj granice apsorpcije ka većim talasnim dužinama. Istoje uočeno i za fotokatalitičku efikasnost. Najveću fotokatalitičku razgradnju boje postigao je uzorakžaren u amonijaku pri najkraćem vremenu.Dalje istraživanje je išlo u smeru proširenja saznanja o pojedinačnim i kombinovanimuticajima dopiranja azotom i deponovanja kvatnih tačaka neorganskog senzivatora nafotokatalitičku aktivnost TiO2 nanocevi. Zapaženo je da deponovanje kvantnih tačaka CdS nijeuticalo na morfologiju nanocevi, ali je na pojedinim mestima došlo do aglomeracije CdSnanočestica, što je dovelo do zatvaranja otvora nanocevi. Utvrđeno je da je fotokatalitičkaefikasnost azotom dopiranih nanocevi poboljšana nakon deponovanja CdS nanočestica. Najvećufotokatlitiču efikasnost pokazao je uzorak sa najvećim sadržajem ukupnog azota i intersticijskogazota u kombinaciji sa deponovanim CdS nanočesticama..., Environmental friendly power sources and cost-effective methods for water and airpurification, are a necessity in modern technologically developed world. Photoactive materials canprovide an environmentally friendly alternative to fossil fuels in power production and enable theremediation of changes in the environment. Namely, photoactive materials absorb light, whichexcites electrons that are responsible for generating electricity or participate in the process ofdecomposition of pollutants. There are a large number of photoactive materials, among which TiO2has attracted particular attention, due to its chemical inertness, resistance to photo and chemicalcorrosion and non-toxicity. The photoactivity of TiO2 depends on many factors, such asmorphology, crystal structure and the degree of recombination of charge carriers.The aim of this doctoral dissertation is to improve the photocatalytic and photoelectricactivity of TiO2 nanotubes. For this purpose, TiO2 nanotubes were synthesized by theelectrochemical anodization of a titanium plate. The influence of the anodization process parameterson the morphology and photocatalytic activity of TiO2 nanotubes for color degradation wasinvestigated. It was found that an increased anodization voltage leads to increased heights anddiameters of nanotubes, causing the shift of the absorption limit towards the visible part of thespectrum and the improvement of the photocatalytic activity. The influence of the annealingtemperature on the crystal structure, morphology and the photocatalytic activity of TiO2 nanotubeswas determined. The anatase crystalline modification with a very low rutile phase content wasobtained by annealing nanotubes at 450 °C. When the annealing temperature was further increased(600 and 650 °C), the presence of both phases, anatase and rutile, was observed in different ratios,and the complete transformation of anatase to rutile occurred at 700 °C. Besides the change in thecrystal structure, the influence of the annealing temperature on the morphology of the nanotubeswas observed as well. As the annealing temperature increased, the height and porosity of nanotubesdecreased, so that the nanotube morphology collapsed at 700 °C. The influence of the crystalstructure and morphology of TiO2 nanotubes on the photocatalytic degradation of methyl-orangewas observed. It was concluded that the simultaneous presence of anatase and rutile provides betterphotocatalytic activity than pure anatase and pure rutile.In order to investigate the effect of nitrogen doping of TiO2 on photocatalytic activity, TiO2nanotubes were annealed in an ammonia atmosphere, at a temperature of 450 °C, for differentannealing times. The influence of the annealing time on the amount and type of doping wasinvestigated. It was observed that annealing in an ammonia atmosphere, for different periods, didnot affect the morphology of nanotubes. A chemical analysis of the surface of TiO2 nanotubes by Xray photoelectron spectroscopy showed that the total nitrogen content in nanotubes decreased withlonger annealing times. In addition, the annealing duration in ammonia also influenced the nature ofnitrogen incorporation into TiO2. With a shorter annealing time, a higher content of interstitialnitrogen and a lower amount of substitution nitrogen were observed. With a longer annealing timein ammonia, the amount of interstitial nitrogen decreased, while the substitution nitrogen increased.The absorption spectra showed that the sample with the highest amount of nitrogen and the highestcontent of interstitial nitrogen showed the largest shift towards higher wavelengths. The sameapplies to the photocatalytic efficiency. The greatest photocatalytic degradation of the dye wasachieved in the sample annealed in ammonia for the shortest time.Further research was directed towards expanding the knowledge of individual and combinedeffects of nitrogen doping and deposition of the quantum dots of inorganic sensors on thephotocatalytic activity of TiO2 nanotubes. It was observed that the deposition of CdS quantum dotsdid not affect the morphology of nanotubes, but in some places agglomeration of CdS nanoparticlesoccurred, due to which nanotube openings closed. The photocatalytic efficiency of nitrogen-dopednanotubes was improved after CdS nanoparticle deposition. The sample with the highest amount oftotal nitrogen and interstitial nitrogen in combination with deposited CdS nanoparticles exhibitedthe highest photocatalytic efficiency...",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
title = "Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata",
url = "https://hdl.handle.net/21.15107/rcub_nardus_18222"
}
Vujančević, J. (2020). Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata.

Универзитет у Београду, Технолошко-металуршки факултет..
Vujančević J. Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata. 2020;.
Vujančević Jelena, "Modifikovanje strukture i fotoaktivnosti nanocevi titan(IV)-oksida dopiranjem i primenom fotoosetljivih komponenata" (2020)

Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike

Živojinović, Jelena A.

(Универзитет у Београду, Технолошко-металуршки факултет, 2020)

TY  - BOOK
AU  - Živojinović, Jelena A.
PY  - 2020
AB  - Cilj ove doktorske disertacije je bio da se analizira i sagleda uticaj mehaničke aktivacije nastrukturu i svojstva nedopiranog i dopiranog SrTiO3 praha, kao i uticaj na strukturu i svojstvakeramike dobijene sinterovanjem ispresaka pomenutih prahova. U slučaju sinterovanih nedopiranihSrTiO3 uzoraka dodatno su razmatrane promene u brzini densifikacije i kinetici sinterovanja. Uticajmehaničke aktivacije i dopanta na električna svojstva stroncijum-titanatne keramike je analiziranmerenjem frekventne zavisnosti relativne dielektrične permitivnosti i tangensa ugla dielektričnihgubitaka na sobnoj temperaturi. Magnetnim merenjima, kod dopiranih SrTiO3 uzoraka dobijenihdodavanjem mangan(IV)-oksida, praćen je uticaj mehaničke aktivacije, koncentracije dopanta ijačine magnetnog polja na vrednost specifične magnetizacije.Mehanička aktivacija SrTiO3 praha je vršena u visoko-energetskom planetarnom mlinu sakuglama, pri čemu je vreme aktivacije nedopiranog praha iznosilo: 5, 10, 30, 60, 90 i 120 minuta,dok je efekat dopiranja razmatran za aktivaciju od 10, 30 i 120 minuta. U cilju dobijanja SrTiO3:Mnsistema, tipa Sr1-xMnxTiO3 (SMnT) ili SrTi1-xMnxO3 (STMn), u polazni SrTiO3 prah je dodatmangan(IV)-oksid (MnO2), pri čemu su izabrane vrednosti za x bile: 0,03, 0,06 i 0,12. Raspodelaveličina čestica je ukazala da je mehanička aktivacija dovela do usitnjavanja čestica polaznog praha,uz istovremenu pojavu šire raspodele veličina čestica pri dužim vremenima aktivacije.Skenirajućom i transmisionom elektronskom mikroskopijom (SEM i TEM) analizirana jemikrostruktura i morfologija polaznog i mehanički aktiviranih prahova. BET metodom je utvrđenoda se najviša vrednost specifične površine kod nedopiranih prahova postiže pri aktivaciji u trajanjuod 60 minuta, dok pri daljoj aktivaciji specifična površina ostaje približno konstantne vrednosti,usled povećane sekundarne aglomerizacije. Pokazano je da je gustina ispreska kod prahaaktiviranog tokom 10-30 minuta najveća. Zapaženo je sniženje intenziteta XRD pikova sa porastomvremena aktivacije, kao i širenje difrakcionih linija, usled smanjenja veličine kristalita i porastamikronaprezanja. Primenjena mehanička aktivacija je omogućila formiranje kubnog nanokristalnogSrTiO3 praha, pri čemu veličina kristalita opada i do ~20 nm sa uvećanjem vremena aktivacije.Uočena promena u vrednosti parametra kristalne rešetke a je posredno ukazala i na mogućepromene u koncentraciji kiseonikovih vakancija. Analizom Ramanovih spektara je praćen uticajmehaničke aktivacije na promene u fononskom spektru prahova, sa posebnim akcentom na polarneTO mode, čiji oblik i intenzitet bitno zavise od defekata kao što su kiseonikove vakancije. Analizaoptičkih svojstava kristalnih materijala pomoću UV-Vis spektroskopije je ukazala na sniženjeenergije zabranjene zone sa uvećanjem vremena aktivacije. Primenom dilatometrije je ispitivanuticaj mehaničke aktivacije na početni stadijum sinterovanja dvostrano presovanih SrTiO3 prahova.Uočeno je značajno smanjenje temperature početka skupljanja ispreska, kao i uticaj na brzinuskupljanja i na konačne gustine sinterovanih uzoraka. Primena Dornove metode je ukazala naznačajno smanjenje efektivne energije aktivacije transporta mase u početnom stadijumusinterovanja, sa porastom vremena mehaničke aktivacije polaznog praha. Za uzorke dobijenesinterovanjem do 1300 oC, uz izotermsko zadržavanje na maksimalnoj temperaturi u trajanju od 2h,je izvršena korelacija između zapaženih strukturnih promena i promena u dielektričnim svojstvima,nastalim usled mehaničke aktivacije. Posebna pažnja je posvećena uticaju promena: gustine,poroznosti, veličine zrna i kristalita, kao i uticaju promena parametra kristalne rešetke, nadielektrična svojstva. Promene vrednosti relativne dielektrične permitivnosti su razmatrane i sastanovišta promena u oblasti granice zrna, posebno imajući u vidu rezultate koji su ukazali napromenu koncentracije kiseonikovih vakancija...
AB  - The aim of this doctoral dissertation is to analyze and evaluate the effect of mechanicalactivation on the structure and properties of undoped and doped SrTiO3 powders, as well as theeffect on the structure and properties of the ceramics obtained by sintering these powders. For thesintered undoped SrTiO3 samples, changes in the densification rate were also analyzed. The effectof mechanical activation and dopant on the electrical properties of strontium titanate ceramics wasanalyzed by measuring the frequency-dependent relative dielectric permittivity and the loss tangentat room temperature. Magnetic measurements performed on the doped SrTiO3 samples obtained bythe addition of manganese(IV) oxide were used to monitor the influence of mechanical activation,dopant concentration and magnetic field strength on magnetization.The mechanical activation of the SrTiO3 powder was performed in a high-energy planetaryball mill; the activation times of the undoped powder were: 5, 10, 30, 60, 90, and 120 minutes,while the doping effect was analyzed for the activation periods of 10, 30, and 120 minutes. In orderto obtain SrTiO3:Mn systems belonging to Sr1-xMnxTiO3 (SMnT) or SrTi1-xMnxO3 (STMn)compound types, manganese(IV) oxide (MnO2) was added to the starting SrTiO3 powder, where thevalues selected for x were: 0.03, 0.06 and 0.12. The particle size distribution indicated thatmechanical activation resulted in the comminution of the starting powder particles, accompaniedwith a wider particle size distribution at longer activation times. The microstructural andmorphological analysis of the starting and mechanically activated powders was performed usingscanning and transmission electron microscopy (SEM and TEM). The BET method revealed that60-minute activation resulted in the highest specific surface area in undoped powders, while furtheractivation led to a relatively constant specific surface due to increased secondary agglomeration.The density of the powder activated for 10-30 minutes was the highest. The intensity of XRD peaksdecreased with longer activation times and diffraction lines broadened due to decreased crystallitesizes and increased microstrain. Mechanical activation led to the formation of cubic nanocrystallineSrTiO3 powder, with the minimum crystallite size of 20 nm. The observed change in the value ofthe crystal lattice parameter indirectly indicated possible changes in the concentration of oxygenvacancies. The analysis of Raman spectra revealed the effect of mechanical activation on thephonon spectrum of powders, with particular emphasis on polar TO modes which shape andintensity generally depend on defects such as oxygen vacancies. The analysis of the opticalproperties of crystalline materials by UV-Vis spectroscopy indicated a correlation betweendecreased band gap energy and increased activation times. The effect of mechanical activation onthe initial stage of sintering of bilaterally pressed SrTiO3 powders was investigated by dilatometry.A significant decrease in the temperature of the onset of densification was observed, as well as theeffect of mechanical activation on the densification rate and on the final density of the sinteredsamples. The application of the Dorn method indicated a significant decrease in the effectiveactivation energy of mass transport in the initial sintering stage, with a longer time of themechanical activation of the starting powder. For the samples obtained by sintering up to 1300 °C,with isothermal retention at the maximum temperature for 2 h, a correlation between the structuralchanges and the changes in dielectric properties resulting from mechanical activation was observed.Particular attention was paid to the effect of changes: density, porosity, grain and crystallite size, as well as the effect of crystal lattice parameter changes on the dielectric properties. The changed values of the relative dielectric permittivity were analyzed in the context of the changes in the grainboundary region, with special respect to the results indicating changes in the oxygen vacancy concentration.
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T2  - Универзитет у Београду
T1  - Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike
UR  - https://hdl.handle.net/21.15107/rcub_dais_9154
ER  - 
@phdthesis{
author = "Živojinović, Jelena A.",
year = "2020",
abstract = "Cilj ove doktorske disertacije je bio da se analizira i sagleda uticaj mehaničke aktivacije nastrukturu i svojstva nedopiranog i dopiranog SrTiO3 praha, kao i uticaj na strukturu i svojstvakeramike dobijene sinterovanjem ispresaka pomenutih prahova. U slučaju sinterovanih nedopiranihSrTiO3 uzoraka dodatno su razmatrane promene u brzini densifikacije i kinetici sinterovanja. Uticajmehaničke aktivacije i dopanta na električna svojstva stroncijum-titanatne keramike je analiziranmerenjem frekventne zavisnosti relativne dielektrične permitivnosti i tangensa ugla dielektričnihgubitaka na sobnoj temperaturi. Magnetnim merenjima, kod dopiranih SrTiO3 uzoraka dobijenihdodavanjem mangan(IV)-oksida, praćen je uticaj mehaničke aktivacije, koncentracije dopanta ijačine magnetnog polja na vrednost specifične magnetizacije.Mehanička aktivacija SrTiO3 praha je vršena u visoko-energetskom planetarnom mlinu sakuglama, pri čemu je vreme aktivacije nedopiranog praha iznosilo: 5, 10, 30, 60, 90 i 120 minuta,dok je efekat dopiranja razmatran za aktivaciju od 10, 30 i 120 minuta. U cilju dobijanja SrTiO3:Mnsistema, tipa Sr1-xMnxTiO3 (SMnT) ili SrTi1-xMnxO3 (STMn), u polazni SrTiO3 prah je dodatmangan(IV)-oksid (MnO2), pri čemu su izabrane vrednosti za x bile: 0,03, 0,06 i 0,12. Raspodelaveličina čestica je ukazala da je mehanička aktivacija dovela do usitnjavanja čestica polaznog praha,uz istovremenu pojavu šire raspodele veličina čestica pri dužim vremenima aktivacije.Skenirajućom i transmisionom elektronskom mikroskopijom (SEM i TEM) analizirana jemikrostruktura i morfologija polaznog i mehanički aktiviranih prahova. BET metodom je utvrđenoda se najviša vrednost specifične površine kod nedopiranih prahova postiže pri aktivaciji u trajanjuod 60 minuta, dok pri daljoj aktivaciji specifična površina ostaje približno konstantne vrednosti,usled povećane sekundarne aglomerizacije. Pokazano je da je gustina ispreska kod prahaaktiviranog tokom 10-30 minuta najveća. Zapaženo je sniženje intenziteta XRD pikova sa porastomvremena aktivacije, kao i širenje difrakcionih linija, usled smanjenja veličine kristalita i porastamikronaprezanja. Primenjena mehanička aktivacija je omogućila formiranje kubnog nanokristalnogSrTiO3 praha, pri čemu veličina kristalita opada i do ~20 nm sa uvećanjem vremena aktivacije.Uočena promena u vrednosti parametra kristalne rešetke a je posredno ukazala i na mogućepromene u koncentraciji kiseonikovih vakancija. Analizom Ramanovih spektara je praćen uticajmehaničke aktivacije na promene u fononskom spektru prahova, sa posebnim akcentom na polarneTO mode, čiji oblik i intenzitet bitno zavise od defekata kao što su kiseonikove vakancije. Analizaoptičkih svojstava kristalnih materijala pomoću UV-Vis spektroskopije je ukazala na sniženjeenergije zabranjene zone sa uvećanjem vremena aktivacije. Primenom dilatometrije je ispitivanuticaj mehaničke aktivacije na početni stadijum sinterovanja dvostrano presovanih SrTiO3 prahova.Uočeno je značajno smanjenje temperature početka skupljanja ispreska, kao i uticaj na brzinuskupljanja i na konačne gustine sinterovanih uzoraka. Primena Dornove metode je ukazala naznačajno smanjenje efektivne energije aktivacije transporta mase u početnom stadijumusinterovanja, sa porastom vremena mehaničke aktivacije polaznog praha. Za uzorke dobijenesinterovanjem do 1300 oC, uz izotermsko zadržavanje na maksimalnoj temperaturi u trajanju od 2h,je izvršena korelacija između zapaženih strukturnih promena i promena u dielektričnim svojstvima,nastalim usled mehaničke aktivacije. Posebna pažnja je posvećena uticaju promena: gustine,poroznosti, veličine zrna i kristalita, kao i uticaju promena parametra kristalne rešetke, nadielektrična svojstva. Promene vrednosti relativne dielektrične permitivnosti su razmatrane i sastanovišta promena u oblasti granice zrna, posebno imajući u vidu rezultate koji su ukazali napromenu koncentracije kiseonikovih vakancija..., The aim of this doctoral dissertation is to analyze and evaluate the effect of mechanicalactivation on the structure and properties of undoped and doped SrTiO3 powders, as well as theeffect on the structure and properties of the ceramics obtained by sintering these powders. For thesintered undoped SrTiO3 samples, changes in the densification rate were also analyzed. The effectof mechanical activation and dopant on the electrical properties of strontium titanate ceramics wasanalyzed by measuring the frequency-dependent relative dielectric permittivity and the loss tangentat room temperature. Magnetic measurements performed on the doped SrTiO3 samples obtained bythe addition of manganese(IV) oxide were used to monitor the influence of mechanical activation,dopant concentration and magnetic field strength on magnetization.The mechanical activation of the SrTiO3 powder was performed in a high-energy planetaryball mill; the activation times of the undoped powder were: 5, 10, 30, 60, 90, and 120 minutes,while the doping effect was analyzed for the activation periods of 10, 30, and 120 minutes. In orderto obtain SrTiO3:Mn systems belonging to Sr1-xMnxTiO3 (SMnT) or SrTi1-xMnxO3 (STMn)compound types, manganese(IV) oxide (MnO2) was added to the starting SrTiO3 powder, where thevalues selected for x were: 0.03, 0.06 and 0.12. The particle size distribution indicated thatmechanical activation resulted in the comminution of the starting powder particles, accompaniedwith a wider particle size distribution at longer activation times. The microstructural andmorphological analysis of the starting and mechanically activated powders was performed usingscanning and transmission electron microscopy (SEM and TEM). The BET method revealed that60-minute activation resulted in the highest specific surface area in undoped powders, while furtheractivation led to a relatively constant specific surface due to increased secondary agglomeration.The density of the powder activated for 10-30 minutes was the highest. The intensity of XRD peaksdecreased with longer activation times and diffraction lines broadened due to decreased crystallitesizes and increased microstrain. Mechanical activation led to the formation of cubic nanocrystallineSrTiO3 powder, with the minimum crystallite size of 20 nm. The observed change in the value ofthe crystal lattice parameter indirectly indicated possible changes in the concentration of oxygenvacancies. The analysis of Raman spectra revealed the effect of mechanical activation on thephonon spectrum of powders, with particular emphasis on polar TO modes which shape andintensity generally depend on defects such as oxygen vacancies. The analysis of the opticalproperties of crystalline materials by UV-Vis spectroscopy indicated a correlation betweendecreased band gap energy and increased activation times. The effect of mechanical activation onthe initial stage of sintering of bilaterally pressed SrTiO3 powders was investigated by dilatometry.A significant decrease in the temperature of the onset of densification was observed, as well as theeffect of mechanical activation on the densification rate and on the final density of the sinteredsamples. The application of the Dorn method indicated a significant decrease in the effectiveactivation energy of mass transport in the initial sintering stage, with a longer time of themechanical activation of the starting powder. For the samples obtained by sintering up to 1300 °C,with isothermal retention at the maximum temperature for 2 h, a correlation between the structuralchanges and the changes in dielectric properties resulting from mechanical activation was observed.Particular attention was paid to the effect of changes: density, porosity, grain and crystallite size, as well as the effect of crystal lattice parameter changes on the dielectric properties. The changed values of the relative dielectric permittivity were analyzed in the context of the changes in the grainboundary region, with special respect to the results indicating changes in the oxygen vacancy concentration.",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
journal = "Универзитет у Београду",
title = "Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike",
url = "https://hdl.handle.net/21.15107/rcub_dais_9154"
}
Živojinović, J. A. (2020). Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike.
Универзитет у Београду
Универзитет у Београду, Технолошко-металуршки факултет..
Živojinović JA. Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike. Универзитет у Београду. 2020;.
Živojinović Jelena A., "Uticaj mehaničke aktivacije na strukturu i svojstva stroncijum-titanatne keramike" Универзитет у Београду (2020)

Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles

Anđelković, Ljubica; Jeremić, Dejan; Milenković, Milica R.; Radosavljević, Jelena; Vulić, Predrag; Pavlović, Vladimir B.; Manojlović, Dragan D.; Nikolić, Aleksandar S.

(Elsevier, 2020)

TY  - JOUR
AU  - Anđelković, Ljubica
AU  - Jeremić, Dejan
AU  - Milenković, Milica R.
AU  - Radosavljević, Jelena
AU  - Vulić, Predrag
AU  - Pavlović, Vladimir B.
AU  - Manojlović, Dragan D.
AU  - Nikolić, Aleksandar S.
PY  - 2020
AB  - A simple organic-phase synthesis process was used to produce bare NiFe2O4 and ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 ferrite nanoparticles. X-ray powder diffractograms for all investigated powders show characteristic peaks of a spinel cubic structure without a secondary phase. Transmission electron microscopy (TEM) indicated the presence of nanoparticles that are smaller than 20 nm. The release of divalent ions (Ni2+ and Zn2+) from synthesized nanoparticles that were dispersed in saline solution, phosphate-buffered saline (PBS) and human serum, as determined by the inductively coupled plasma mass spectrometry (ICP-MS) method, was lower than 2 wt %. These results demonstrate the stability of the investigated nanoparticles in biologically relevant media and exclude the toxicity of Ni2+ and Zn2+ due to metal ion release, thereby opening a broad range of (bio)medical applications.
PB  - Elsevier
T2  - Ceramics International
T1  - Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles
SP  - 3528
EP  - 3533
VL  - 46
IS  - 3
DO  - 10.1016/j.ceramint.2019.10.068
UR  - https://hdl.handle.net/21.15107/rcub_dais_6901
ER  - 
@article{
author = "Anđelković, Ljubica and Jeremić, Dejan and Milenković, Milica R. and Radosavljević, Jelena and Vulić, Predrag and Pavlović, Vladimir B. and Manojlović, Dragan D. and Nikolić, Aleksandar S.",
year = "2020",
abstract = "A simple organic-phase synthesis process was used to produce bare NiFe2O4 and ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 ferrite nanoparticles. X-ray powder diffractograms for all investigated powders show characteristic peaks of a spinel cubic structure without a secondary phase. Transmission electron microscopy (TEM) indicated the presence of nanoparticles that are smaller than 20 nm. The release of divalent ions (Ni2+ and Zn2+) from synthesized nanoparticles that were dispersed in saline solution, phosphate-buffered saline (PBS) and human serum, as determined by the inductively coupled plasma mass spectrometry (ICP-MS) method, was lower than 2 wt %. These results demonstrate the stability of the investigated nanoparticles in biologically relevant media and exclude the toxicity of Ni2+ and Zn2+ due to metal ion release, thereby opening a broad range of (bio)medical applications.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles",
pages = "3528-3533",
volume = "46",
number = "3",
doi = "10.1016/j.ceramint.2019.10.068",
url = "https://hdl.handle.net/21.15107/rcub_dais_6901"
}
Anđelković, L., Jeremić, D., Milenković, M. R., Radosavljević, J., Vulić, P., Pavlović, V. B., Manojlović, D. D.,& Nikolić, A. S. (2020). Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles.
Ceramics International
Elsevier., 46(3), 3528-3533.
https://doi.org/10.1016/j.ceramint.2019.10.068
Anđelković L, Jeremić D, Milenković MR, Radosavljević J, Vulić P, Pavlović VB, Manojlović DD, Nikolić AS. Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles. Ceramics International. 2020;46(3):3528-3533.
doi:10.1016/j.ceramint.2019.10.068.
Anđelković Ljubica, Jeremić Dejan, Milenković Milica R., Radosavljević Jelena, Vulić Predrag, Pavlović Vladimir B., Manojlović Dragan D., Nikolić Aleksandar S., "Synthesis, characterization and in vitro evaluation of divalent ion release from stable NiFe2O4, ZnFe2O4 and core-shell ZnFe2O4@NiFe2O4 nanoparticles" Ceramics International, 46, no. 3 (2020):3528-3533,
https://doi.org/10.1016/j.ceramint.2019.10.068 .
6
3
6

Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics

Obradović, Nina; Fahrenholtz, William G.; Filipović, Suzana; Marković, Smilja; Blagojević, Vladimir A.; Lević, Steva; Savić, Slobodan; Đorđević, Antonije; Pavlović, Vladimir B.

(Springer, 2020)

TY  - JOUR
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Blagojević, Vladimir A.
AU  - Lević, Steva
AU  - Savić, Slobodan
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2020
AB  - Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics
SP  - 95
EP  - 107
VL  - 140
DO  - 10.1007/s10973-019-08846-w
UR  - https://hdl.handle.net/21.15107/rcub_dais_6910
ER  - 
@article{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Marković, Smilja and Blagojević, Vladimir A. and Lević, Steva and Savić, Slobodan and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2020",
abstract = "Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics",
pages = "95-107",
volume = "140",
doi = "10.1007/s10973-019-08846-w",
url = "https://hdl.handle.net/21.15107/rcub_dais_6910"
}
Obradović, N., Fahrenholtz, W. G., Filipović, S., Marković, S., Blagojević, V. A., Lević, S., Savić, S., Đorđević, A.,& Pavlović, V. B. (2020). Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics.
Journal of Thermal Analysis and Calorimetry
Springer., 140, 95-107.
https://doi.org/10.1007/s10973-019-08846-w
Obradović N, Fahrenholtz WG, Filipović S, Marković S, Blagojević VA, Lević S, Savić S, Đorđević A, Pavlović VB. Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. Journal of Thermal Analysis and Calorimetry. 2020;140:95-107.
doi:10.1007/s10973-019-08846-w.
Obradović Nina, Fahrenholtz William G., Filipović Suzana, Marković Smilja, Blagojević Vladimir A., Lević Steva, Savić Slobodan, Đorđević Antonije, Pavlović Vladimir B., "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics" Journal of Thermal Analysis and Calorimetry, 140 (2020):95-107,
https://doi.org/10.1007/s10973-019-08846-w .
1
2
2

Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics

Obradović, Nina; Fahrenholtz, William G.; Filipović, Suzana; Marković, Smilja; Blagojević, Vladimir A.; Lević, Steva; Savić, Slobodan; Đorđević, Antonije; Pavlović, Vladimir B.

(Springer, 2020)

TY  - JOUR
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Blagojević, Vladimir A.
AU  - Lević, Steva
AU  - Savić, Slobodan
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2020
AB  - Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics
SP  - 95
EP  - 107
VL  - 140
DO  - 10.1007/s10973-019-08846-w
UR  - https://hdl.handle.net/21.15107/rcub_dais_10027
ER  - 
@article{
author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Marković, Smilja and Blagojević, Vladimir A. and Lević, Steva and Savić, Slobodan and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2020",
abstract = "Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics",
pages = "95-107",
volume = "140",
doi = "10.1007/s10973-019-08846-w",
url = "https://hdl.handle.net/21.15107/rcub_dais_10027"
}
Obradović, N., Fahrenholtz, W. G., Filipović, S., Marković, S., Blagojević, V. A., Lević, S., Savić, S., Đorđević, A.,& Pavlović, V. B. (2020). Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics.
Journal of Thermal Analysis and Calorimetry
Springer., 140, 95-107.
https://doi.org/10.1007/s10973-019-08846-w
Obradović N, Fahrenholtz WG, Filipović S, Marković S, Blagojević VA, Lević S, Savić S, Đorđević A, Pavlović VB. Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. Journal of Thermal Analysis and Calorimetry. 2020;140:95-107.
doi:10.1007/s10973-019-08846-w.
Obradović Nina, Fahrenholtz William G., Filipović Suzana, Marković Smilja, Blagojević Vladimir A., Lević Steva, Savić Slobodan, Đorđević Antonije, Pavlović Vladimir B., "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics" Journal of Thermal Analysis and Calorimetry, 140 (2020):95-107,
https://doi.org/10.1007/s10973-019-08846-w .
1
2
2

Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661

Ristić, Predrag; Blagojević, Vladimir A.; Janjić, Goran V.; Rodić, Marko; Vulić, Predrag J.; Donnard, Morgan; Gulea, Mihaela; Chylewska, Agnieszka; Makowski, Mariusz; Todorović, Tamara; Filipović, Nenad R.

(American Chemical Society, 2020)

TY  - BOOK
AU  - Ristić, Predrag
AU  - Blagojević, Vladimir A.
AU  - Janjić, Goran V.
AU  - Rodić, Marko
AU  - Vulić, Predrag J.
AU  - Donnard, Morgan
AU  - Gulea, Mihaela
AU  - Chylewska, Agnieszka
AU  - Makowski, Mariusz
AU  - Todorović, Tamara
AU  - Filipović, Nenad R.
PY  - 2020
AB  - Figure S1.IR spectra of gaseous decomposition products obtained during TGexperiments with 1(A) and 2(B);Figure S2.The 3D presentation of thermal decompositions versustime together with IR spectra of their gaseous products: (a)1; (b)2; Figure S3. Overlapped experimental (blue) and calculated (red) powder XRD diffractograms of 1 (A) and 2 (B); Figure S4.Comparison between experimental powder XRD patterns of 1(left) and 2(right) with simulated  patterns  of  their  analogues  with  different positionof M‒Sbondwith  respect  to  the TM-CN ring chair conformation; Figure S5. Optical microscope images of Pt-(left) and Pd-complex (right)showing as-obtained single crystals; Figure S6.SEM images of Pt-(left) and Pd-complex (right)after reduction to powder for XRD measurements; Figure S7. 1H NMR spectra of TM-CN in DMSO-d6(A) and CD3NO2(B); Figure S8. 13CNMR spectra of TM-CN in DMSO-d6(A) and CD3NO2(B); Figure S9. 1H (A) and 13CNMR (B) spectra of 1in DMSO-d6; Figure S10. COSY spectrum of 1in DMSO-d6; Figure S11. NOESY spectrum of 1in DMSO-d6; Figure S12. 1H–13CHSQC spectrum of 1in DMSO-d6, Figure S13. 1H (A) and 13CNMR (B) spectra of 1in CD3NO2; Figure S14. 1H (A) and 13CNMR (B) spectra of 2in DMSO-d6; Figure S15. 1H (A) and 13CNMR (B) spectra of 2in CD3NO2; Scheme S1. Labellingof atoms used for NMR signal assignments;
Table  S1.Experimental  vibrational  frequencies  (cm-1)  and  signals  description  of  complexes studied;Table S2.Crystal data and structure refinement for 1and 2; Table S3.Selected bond lengths (Å) and angles (°) for complexes 1 and 2;Table  S4. Results  of  energy  calculations  for  C-H/Cl-M,  C-H/S-M,  C-H/M  and C-H/NCinteractions  (M=  Pd(II)  and  Pt(II))  at wb97xd/6-31+g**  +lanl2dzlevel  of  theory.  Energies  are expressed in kcal/mol; Table  S5.C-H/M  interactions  obtained  from  the  periodic  calculations  of  axial  and  equatorially coordinated Pd and Pt; Table S6.1H NMR spectral data (399.74 MHz)in DMSO-d6and CD3NO2at 298 K for TM-CN and complexes 1and 2; Table S7. 13C NMR spectral data (100.53 MHz)in DMSO-d6and CD3NO2at 298 K for TM-CN and complexes 1and 2.
PB  - American Chemical Society
T2  - Crystal Growth & Design
T1  - Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661
UR  - https://hdl.handle.net/21.15107/rcub_dais_9455
ER  - 
@book{
author = "Ristić, Predrag and Blagojević, Vladimir A. and Janjić, Goran V. and Rodić, Marko and Vulić, Predrag J. and Donnard, Morgan and Gulea, Mihaela and Chylewska, Agnieszka and Makowski, Mariusz and Todorović, Tamara and Filipović, Nenad R.",
year = "2020",
abstract = "Figure S1.IR spectra of gaseous decomposition products obtained during TGexperiments with 1(A) and 2(B);Figure S2.The 3D presentation of thermal decompositions versustime together with IR spectra of their gaseous products: (a)1; (b)2; Figure S3. Overlapped experimental (blue) and calculated (red) powder XRD diffractograms of 1 (A) and 2 (B); Figure S4.Comparison between experimental powder XRD patterns of 1(left) and 2(right) with simulated  patterns  of  their  analogues  with  different positionof M‒Sbondwith  respect  to  the TM-CN ring chair conformation; Figure S5. Optical microscope images of Pt-(left) and Pd-complex (right)showing as-obtained single crystals; Figure S6.SEM images of Pt-(left) and Pd-complex (right)after reduction to powder for XRD measurements; Figure S7. 1H NMR spectra of TM-CN in DMSO-d6(A) and CD3NO2(B); Figure S8. 13CNMR spectra of TM-CN in DMSO-d6(A) and CD3NO2(B); Figure S9. 1H (A) and 13CNMR (B) spectra of 1in DMSO-d6; Figure S10. COSY spectrum of 1in DMSO-d6; Figure S11. NOESY spectrum of 1in DMSO-d6; Figure S12. 1H–13CHSQC spectrum of 1in DMSO-d6, Figure S13. 1H (A) and 13CNMR (B) spectra of 1in CD3NO2; Figure S14. 1H (A) and 13CNMR (B) spectra of 2in DMSO-d6; Figure S15. 1H (A) and 13CNMR (B) spectra of 2in CD3NO2; Scheme S1. Labellingof atoms used for NMR signal assignments;
Table  S1.Experimental  vibrational  frequencies  (cm-1)  and  signals  description  of  complexes studied;Table S2.Crystal data and structure refinement for 1and 2; Table S3.Selected bond lengths (Å) and angles (°) for complexes 1 and 2;Table  S4. Results  of  energy  calculations  for  C-H/Cl-M,  C-H/S-M,  C-H/M  and C-H/NCinteractions  (M=  Pd(II)  and  Pt(II))  at wb97xd/6-31+g**  +lanl2dzlevel  of  theory.  Energies  are expressed in kcal/mol; Table  S5.C-H/M  interactions  obtained  from  the  periodic  calculations  of  axial  and  equatorially coordinated Pd and Pt; Table S6.1H NMR spectral data (399.74 MHz)in DMSO-d6and CD3NO2at 298 K for TM-CN and complexes 1and 2; Table S7. 13C NMR spectral data (100.53 MHz)in DMSO-d6and CD3NO2at 298 K for TM-CN and complexes 1and 2.",
publisher = "American Chemical Society",
journal = "Crystal Growth & Design",
title = "Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661",
url = "https://hdl.handle.net/21.15107/rcub_dais_9455"
}
Ristić, P., Blagojević, V. A., Janjić, G. V., Rodić, M., Vulić, P. J., Donnard, M., Gulea, M., Chylewska, A., Makowski, M., Todorović, T.,& Filipović, N. R. (2020). Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661.
Crystal Growth & Design
American Chemical Society..
Ristić P, Blagojević VA, Janjić GV, Rodić M, Vulić PJ, Donnard M, Gulea M, Chylewska A, Makowski M, Todorović T, Filipović NR. Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661. Crystal Growth & Design. 2020;.
Ristić Predrag, Blagojević Vladimir A., Janjić Goran V., Rodić Marko, Vulić Predrag J., Donnard Morgan, Gulea Mihaela, Chylewska Agnieszka, Makowski Mariusz, Todorović Tamara, Filipović Nenad R., "Supplementary data for the article: Ristić, P.; Blagojević, V.; Janjić, G.; Rodić, M.; Vulić, P.; Donnard, M.; Gulea, M.; Chylewska, A.; Makowski, M.; Todorović, T.; Filipović, N. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-Carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design 2020, 20 (5), 3018–3033. https://doi.org/10.1021/acs.cgd.9b01661" Crystal Growth & Design (2020)

Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study

Ristić, Predrag; Blagojević, Vladimir A.; Janjić, Goran V.; Rodić, Marko; Vulić, Predrag J.; Donnard, Morgan; Gulea, Mihaela; Chylewska, Agnieszka; Makowski, Mariusz; Todorović, Tamara; Filipović, Nenad R.

(American Chemical Society, 2020)

TY  - JOUR
AU  - Ristić, Predrag
AU  - Blagojević, Vladimir A.
AU  - Janjić, Goran V.
AU  - Rodić, Marko
AU  - Vulić, Predrag J.
AU  - Donnard, Morgan
AU  - Gulea, Mihaela
AU  - Chylewska, Agnieszka
AU  - Makowski, Mariusz
AU  - Todorović, Tamara
AU  - Filipović, Nenad R.
PY  - 2020
AB  - Pt(II) and Pd(II) complexes (1 and 2, respectively) with thiomorpholine-4-carbonitrile (TM-CN), an N-substituted thiomorpholine derivative, were synthesized from tetrachlorido precursors in water. Structural analysis has shown that 1 represents the first monomeric metal complex with this ligand type with an axial M-S bond with respect to the TM-CN ring chair conformation, while in 2 a typical equatorial M-S bond position with respect to the ring chair conformation was observed. A detailed DFT investigation revealed that axial conformers are more stable for molecular forms of both metals, while intermolecular interactions in the crystals stabilize the axial conformer for Pt(II) and the equatorial conformer for Pd(II). The magnitude of this stabilization in the case of 2 is large enough to change the most stable axial conformer in the molecular form to the equatorial conformer in the crystal. Further investigation of the strength of individual intermolecular interactions revealed significant differences of some interactions between the two structures. The likely cause of the difference in the crystal structures of experimentally obtained complexes is the fact that 1 and 2 exhibit different dominant interactions: C-H/M and C-H/S are more dominant in 1 and C-H/Cl interactions are more dominant in 2. In addition, DFT calculations have shown that while the axial position of the Pt-S bond with respect to the ring chair conformation results in a significantly shorter C-H/Pt interaction distance than that in the hypothetical equatorial conformer, there is very little difference in C-H/Pd interaction distances in conformers with axial and equatorial positions of Pd-S bond with respect to the ring chair conformation.
PB  - American Chemical Society
T2  - Crystal Growth & Design
T1  - Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study
SP  - 3018
EP  - 3033
VL  - 20
IS  - 5
DO  - 10.1021/acs.cgd.9b01661
UR  - https://hdl.handle.net/21.15107/rcub_dais_9454
ER  - 
@article{
author = "Ristić, Predrag and Blagojević, Vladimir A. and Janjić, Goran V. and Rodić, Marko and Vulić, Predrag J. and Donnard, Morgan and Gulea, Mihaela and Chylewska, Agnieszka and Makowski, Mariusz and Todorović, Tamara and Filipović, Nenad R.",
year = "2020",
abstract = "Pt(II) and Pd(II) complexes (1 and 2, respectively) with thiomorpholine-4-carbonitrile (TM-CN), an N-substituted thiomorpholine derivative, were synthesized from tetrachlorido precursors in water. Structural analysis has shown that 1 represents the first monomeric metal complex with this ligand type with an axial M-S bond with respect to the TM-CN ring chair conformation, while in 2 a typical equatorial M-S bond position with respect to the ring chair conformation was observed. A detailed DFT investigation revealed that axial conformers are more stable for molecular forms of both metals, while intermolecular interactions in the crystals stabilize the axial conformer for Pt(II) and the equatorial conformer for Pd(II). The magnitude of this stabilization in the case of 2 is large enough to change the most stable axial conformer in the molecular form to the equatorial conformer in the crystal. Further investigation of the strength of individual intermolecular interactions revealed significant differences of some interactions between the two structures. The likely cause of the difference in the crystal structures of experimentally obtained complexes is the fact that 1 and 2 exhibit different dominant interactions: C-H/M and C-H/S are more dominant in 1 and C-H/Cl interactions are more dominant in 2. In addition, DFT calculations have shown that while the axial position of the Pt-S bond with respect to the ring chair conformation results in a significantly shorter C-H/Pt interaction distance than that in the hypothetical equatorial conformer, there is very little difference in C-H/Pd interaction distances in conformers with axial and equatorial positions of Pd-S bond with respect to the ring chair conformation.",
publisher = "American Chemical Society",
journal = "Crystal Growth & Design",
title = "Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study",
pages = "3018-3033",
volume = "20",
number = "5",
doi = "10.1021/acs.cgd.9b01661",
url = "https://hdl.handle.net/21.15107/rcub_dais_9454"
}
Ristić, P., Blagojević, V. A., Janjić, G. V., Rodić, M., Vulić, P. J., Donnard, M., Gulea, M., Chylewska, A., Makowski, M., Todorović, T.,& Filipović, N. R. (2020). Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study.
Crystal Growth & Design
American Chemical Society., 20(5), 3018-3033.
https://doi.org/10.1021/acs.cgd.9b01661
Ristić P, Blagojević VA, Janjić GV, Rodić M, Vulić PJ, Donnard M, Gulea M, Chylewska A, Makowski M, Todorović T, Filipović NR. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design. 2020;20(5):3018-3033.
doi:10.1021/acs.cgd.9b01661.
Ristić Predrag, Blagojević Vladimir A., Janjić Goran V., Rodić Marko, Vulić Predrag J., Donnard Morgan, Gulea Mihaela, Chylewska Agnieszka, Makowski Mariusz, Todorović Tamara, Filipović Nenad R., "Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study" Crystal Growth & Design, 20, no. 5 (2020):3018-3033,
https://doi.org/10.1021/acs.cgd.9b01661 .
1
3
2
3

Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study

Ristić, Predrag; Blagojević, Vladimir A.; Janjić, Goran V.; Rodić, Marko; Vulić, Predrag J.; Donnard, Morgan; Gulea, Mihaela; Chylewska, Agnieszka; Makowski, Mariusz; Todorović, Tamara; Filipović, Nenad R.

(American Chemical Society, 2020)

TY  - JOUR
AU  - Ristić, Predrag
AU  - Blagojević, Vladimir A.
AU  - Janjić, Goran V.
AU  - Rodić, Marko
AU  - Vulić, Predrag J.
AU  - Donnard, Morgan
AU  - Gulea, Mihaela
AU  - Chylewska, Agnieszka
AU  - Makowski, Mariusz
AU  - Todorović, Tamara
AU  - Filipović, Nenad R.
PY  - 2020
AB  - Pt(II) and Pd(II) complexes (1 and 2, respectively) with thiomorpholine-4-carbonitrile (TM-CN), an N-substituted thiomorpholine derivative, were synthesized from tetrachlorido precursors in water. Structural analysis has shown that 1 represents the first monomeric metal complex with this ligand type with an axial M-S bond with respect to the TM-CN ring chair conformation, while in 2 a typical equatorial M-S bond position with respect to the ring chair conformation was observed. A detailed DFT investigation revealed that axial conformers are more stable for molecular forms of both metals, while intermolecular interactions in the crystals stabilize the axial conformer for Pt(II) and the equatorial conformer for Pd(II). The magnitude of this stabilization in the case of 2 is large enough to change the most stable axial conformer in the molecular form to the equatorial conformer in the crystal. Further investigation of the strength of individual intermolecular interactions revealed significant differences of some interactions between the two structures. The likely cause of the difference in the crystal structures of experimentally obtained complexes is the fact that 1 and 2 exhibit different dominant interactions: C-H/M and C-H/S are more dominant in 1 and C-H/Cl interactions are more dominant in 2. In addition, DFT calculations have shown that while the axial position of the Pt-S bond with respect to the ring chair conformation results in a significantly shorter C-H/Pt interaction distance than that in the hypothetical equatorial conformer, there is very little difference in C-H/Pd interaction distances in conformers with axial and equatorial positions of Pd-S bond with respect to the ring chair conformation.
PB  - American Chemical Society
T2  - Crystal Growth & Design
T1  - Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study
SP  - 3018
EP  - 3033
VL  - 20
IS  - 5
DO  - 10.1021/acs.cgd.9b01661
UR  - https://hdl.handle.net/21.15107/rcub_dais_9453
ER  - 
@article{
author = "Ristić, Predrag and Blagojević, Vladimir A. and Janjić, Goran V. and Rodić, Marko and Vulić, Predrag J. and Donnard, Morgan and Gulea, Mihaela and Chylewska, Agnieszka and Makowski, Mariusz and Todorović, Tamara and Filipović, Nenad R.",
year = "2020",
abstract = "Pt(II) and Pd(II) complexes (1 and 2, respectively) with thiomorpholine-4-carbonitrile (TM-CN), an N-substituted thiomorpholine derivative, were synthesized from tetrachlorido precursors in water. Structural analysis has shown that 1 represents the first monomeric metal complex with this ligand type with an axial M-S bond with respect to the TM-CN ring chair conformation, while in 2 a typical equatorial M-S bond position with respect to the ring chair conformation was observed. A detailed DFT investigation revealed that axial conformers are more stable for molecular forms of both metals, while intermolecular interactions in the crystals stabilize the axial conformer for Pt(II) and the equatorial conformer for Pd(II). The magnitude of this stabilization in the case of 2 is large enough to change the most stable axial conformer in the molecular form to the equatorial conformer in the crystal. Further investigation of the strength of individual intermolecular interactions revealed significant differences of some interactions between the two structures. The likely cause of the difference in the crystal structures of experimentally obtained complexes is the fact that 1 and 2 exhibit different dominant interactions: C-H/M and C-H/S are more dominant in 1 and C-H/Cl interactions are more dominant in 2. In addition, DFT calculations have shown that while the axial position of the Pt-S bond with respect to the ring chair conformation results in a significantly shorter C-H/Pt interaction distance than that in the hypothetical equatorial conformer, there is very little difference in C-H/Pd interaction distances in conformers with axial and equatorial positions of Pd-S bond with respect to the ring chair conformation.",
publisher = "American Chemical Society",
journal = "Crystal Growth & Design",
title = "Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study",
pages = "3018-3033",
volume = "20",
number = "5",
doi = "10.1021/acs.cgd.9b01661",
url = "https://hdl.handle.net/21.15107/rcub_dais_9453"
}
Ristić, P., Blagojević, V. A., Janjić, G. V., Rodić, M., Vulić, P. J., Donnard, M., Gulea, M., Chylewska, A., Makowski, M., Todorović, T.,& Filipović, N. R. (2020). Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study.
Crystal Growth & Design
American Chemical Society., 20(5), 3018-3033.
https://doi.org/10.1021/acs.cgd.9b01661
Ristić P, Blagojević VA, Janjić GV, Rodić M, Vulić PJ, Donnard M, Gulea M, Chylewska A, Makowski M, Todorović T, Filipović NR. Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study. Crystal Growth & Design. 2020;20(5):3018-3033.
doi:10.1021/acs.cgd.9b01661.
Ristić Predrag, Blagojević Vladimir A., Janjić Goran V., Rodić Marko, Vulić Predrag J., Donnard Morgan, Gulea Mihaela, Chylewska Agnieszka, Makowski Mariusz, Todorović Tamara, Filipović Nenad R., "Influence of C–H/X (X = S, Cl, N, Pt/Pd) Interactions on the Molecular and Crystal Structures of Pt(II) and Pd(II) Complexes with Thiomorpholine-4-carbonitrile: Crystallographic, Thermal, and DFT Study" Crystal Growth & Design, 20, no. 5 (2020):3018-3033,
https://doi.org/10.1021/acs.cgd.9b01661 .
1
3
2
3

The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation

Spasojević, Milica; Ribić Zelenović, Lenka; Spasojević, Miroslav; Trišović, Tomislav

(Editura Academiei Romane, 2020)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Ribić Zelenović, Lenka
AU  - Spasojević, Miroslav
AU  - Trišović, Tomislav
PY  - 2020
AB  - A catalytic coating composed of a mixture of RuO2 and Pt nanocrystals was prepared by a thermal procedure on a titanium substrate and used for the electrochemical oxidation of methanol. The adsorption of the intermediate CO, formed by methanol oxidation on Pt nanocrystals, depended on potential and the coating composition. An increase in the RuO2 content decreased the rate of methanol dehydrogenation and increased the rate of oxidation of the strongly bound intermediate COad. This caused a decrease in the maximum coverage of Pt nanocrystals with COad and a shift of the rapid linear drop in COad coverage to more negative potentials.
PB  - Editura Academiei Romane
T2  - Revue Roumaine de Chimie
T1  - The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation
SP  - 481
EP  - 489
VL  - 65
IS  - 5
DO  - 10.33224/rrch.2020.65.5.08
UR  - https://hdl.handle.net/21.15107/rcub_dais_10033
ER  - 
@article{
author = "Spasojević, Milica and Ribić Zelenović, Lenka and Spasojević, Miroslav and Trišović, Tomislav",
year = "2020",
abstract = "A catalytic coating composed of a mixture of RuO2 and Pt nanocrystals was prepared by a thermal procedure on a titanium substrate and used for the electrochemical oxidation of methanol. The adsorption of the intermediate CO, formed by methanol oxidation on Pt nanocrystals, depended on potential and the coating composition. An increase in the RuO2 content decreased the rate of methanol dehydrogenation and increased the rate of oxidation of the strongly bound intermediate COad. This caused a decrease in the maximum coverage of Pt nanocrystals with COad and a shift of the rapid linear drop in COad coverage to more negative potentials.",
publisher = "Editura Academiei Romane",
journal = "Revue Roumaine de Chimie",
title = "The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation",
pages = "481-489",
volume = "65",
number = "5",
doi = "10.33224/rrch.2020.65.5.08",
url = "https://hdl.handle.net/21.15107/rcub_dais_10033"
}
Spasojević, M., Ribić Zelenović, L., Spasojević, M.,& Trišović, T. (2020). The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation.
Revue Roumaine de Chimie
Editura Academiei Romane., 65(5), 481-489.
https://doi.org/10.33224/rrch.2020.65.5.08
Spasojević M, Ribić Zelenović L, Spasojević M, Trišović T. The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation. Revue Roumaine de Chimie. 2020;65(5):481-489.
doi:10.33224/rrch.2020.65.5.08.
Spasojević Milica, Ribić Zelenović Lenka, Spasojević Miroslav, Trišović Tomislav, "The effect of the composition of the alloy of RuO2 and Pt nanocrystals on intermediate adsorption during methanol oxidation" Revue Roumaine de Chimie, 65, no. 5 (2020):481-489,
https://doi.org/10.33224/rrch.2020.65.5.08 .
2
2

Analyses of the surface parameters in polycrystalline diamonds

Veljković, Sandra; Mitić, Vojislav V.; Paunović, Vesna; Lazović, Goran; Mohr, Markus; Fecht, Hans

(Čačak : University of Kragujevac, Faculty of Technical Sciences, 2020)

TY  - JOUR
AU  - Veljković, Sandra
AU  - Mitić, Vojislav V.
AU  - Paunović, Vesna
AU  - Lazović, Goran
AU  - Mohr, Markus
AU  - Fecht, Hans
PY  - 2020
AB  - There is a progressing interests for polycrystalline diamonds and they have been more extensively used recently. This area has been intensively researched due to the outstanding potential of this material, and this necessitated presenting some of the latest application related to engineering in this paper. A better insight of polycrystalline diamonds properties can be achieved by intensively researching the surface structure. Samples of nanocrystalline diamonds grown by the chemical vapor deposition method are analyzed and accordingly, the focus of the research was the surface parameters and their structure. It is observed that waviness and texture are unique for any direction, their values are almost the same for the chosen directions and they vary approximately from -0.2 nm to 0.4 nm. Analyses of the parameters allowed a more detailed insight into the morphology of the surfaces of polycrystalline films.
PB  - Čačak : University of Kragujevac, Faculty of Technical Sciences
T2  - Serbian Journal of Electrical Engineering
T1  - Analyses of the surface parameters in polycrystalline diamonds
SP  - 111
EP  - 129
VL  - 17
IS  - 1
DO  - 10.2298/SJEE2001111V
UR  - https://hdl.handle.net/21.15107/rcub_dais_10046
ER  - 
@article{
author = "Veljković, Sandra and Mitić, Vojislav V. and Paunović, Vesna and Lazović, Goran and Mohr, Markus and Fecht, Hans",
year = "2020",
abstract = "There is a progressing interests for polycrystalline diamonds and they have been more extensively used recently. This area has been intensively researched due to the outstanding potential of this material, and this necessitated presenting some of the latest application related to engineering in this paper. A better insight of polycrystalline diamonds properties can be achieved by intensively researching the surface structure. Samples of nanocrystalline diamonds grown by the chemical vapor deposition method are analyzed and accordingly, the focus of the research was the surface parameters and their structure. It is observed that waviness and texture are unique for any direction, their values are almost the same for the chosen directions and they vary approximately from -0.2 nm to 0.4 nm. Analyses of the parameters allowed a more detailed insight into the morphology of the surfaces of polycrystalline films.",
publisher = "Čačak : University of Kragujevac, Faculty of Technical Sciences",
journal = "Serbian Journal of Electrical Engineering",
title = "Analyses of the surface parameters in polycrystalline diamonds",
pages = "111-129",
volume = "17",
number = "1",
doi = "10.2298/SJEE2001111V",
url = "https://hdl.handle.net/21.15107/rcub_dais_10046"
}
Veljković, S., Mitić, V. V., Paunović, V., Lazović, G., Mohr, M.,& Fecht, H. (2020). Analyses of the surface parameters in polycrystalline diamonds.
Serbian Journal of Electrical Engineering
Čačak : University of Kragujevac, Faculty of Technical Sciences., 17(1), 111-129.
https://doi.org/10.2298/SJEE2001111V
Veljković S, Mitić VV, Paunović V, Lazović G, Mohr M, Fecht H. Analyses of the surface parameters in polycrystalline diamonds. Serbian Journal of Electrical Engineering. 2020;17(1):111-129.
doi:10.2298/SJEE2001111V.
Veljković Sandra, Mitić Vojislav V., Paunović Vesna, Lazović Goran, Mohr Markus, Fecht Hans, "Analyses of the surface parameters in polycrystalline diamonds" Serbian Journal of Electrical Engineering, 17, no. 1 (2020):111-129,
https://doi.org/10.2298/SJEE2001111V .

Niobium doping effect on BaTiO3 structure and dielectric properties

Paunović, Vesna; Mitić, Vojislav V.; Đorđević, M.; Prijić, Z.

(Elsevier, 2020)

TY  - JOUR
AU  - Paunović, Vesna
AU  - Mitić, Vojislav V.
AU  - Đorđević, M.
AU  - Prijić, Z.
PY  - 2020
AB  - The effect of Nb on the microstructure and dielectric properties of BaTiO3 ceramics was investigated. The Nb/Mn–BaTiO3 ceramics were prepared using a conventional solid-state method. The concentration of Nb varied from 0.1 to 5.0 at% but Mn was fixed at 0.05 at%. The SEM indicated that compositions of 0.1 and 0.5 at% Nb displayed a fairly uniform microstructure and homogeneous distribution of additives, with a grain size of less than 2 μm. In highly doped samples a wide range of microstructural features was observed, from homogeneous and completely fine-grained microstructure to the appearance of secondary abnormal grains with core-shell structure. The dielectric constant and the loss tangent of modified ceramics were measured as a function of temperature (20–180 °C) and frequency (100 Hz-1MHz) for different concentrations of additives. The obtained results have shown that the dielectric constant at, both, room temperature (εr) and Curie temperature (εrmax), decreased as the concentration of Nb5+ increased. Thus, the highest values for the dielectric constant at room temperature (εr = 6648) as well as at Curie temperature (εrmax = 7680) were measured for the 0.1Nb/Mn–BaTiO3 samples sintered at 1350 °C. The highly doped BaTiO3 ceramics were found to exhibit lower values of the dielectric constant and low dielectric losses at room temperature. In these samples, stable dielectric permittivity with a flat dielectric behavior over a wide temperature range is observed. The Curie constant for all series of samples decreases with an increase of dopant concentration and the highest values were measured from samples doped with 0.1 at% Nb. The effect of additives on the Curie constant change is more pronounced at higher sintering temperatures. The analysis of the critical nonlinearity exponent (γ = 1.07–1.27), for lower dopant concentrations, shows a sharp phase transformation. For samples with increased Nb content, the degree of nonlinearity γ is higher indicating a diffuse phase transformation.
PB  - Elsevier
T2  - Ceramics International
T1  - Niobium doping effect on BaTiO3 structure and dielectric properties
SP  - 8154
EP  - 8164
VL  - 46
IS  - 6
DO  - 10.1016/j.ceramint.2019.12.043
UR  - https://hdl.handle.net/21.15107/rcub_dais_8964
ER  - 
@article{
author = "Paunović, Vesna and Mitić, Vojislav V. and Đorđević, M. and Prijić, Z.",
year = "2020",
abstract = "The effect of Nb on the microstructure and dielectric properties of BaTiO3 ceramics was investigated. The Nb/Mn–BaTiO3 ceramics were prepared using a conventional solid-state method. The concentration of Nb varied from 0.1 to 5.0 at% but Mn was fixed at 0.05 at%. The SEM indicated that compositions of 0.1 and 0.5 at% Nb displayed a fairly uniform microstructure and homogeneous distribution of additives, with a grain size of less than 2 μm. In highly doped samples a wide range of microstructural features was observed, from homogeneous and completely fine-grained microstructure to the appearance of secondary abnormal grains with core-shell structure. The dielectric constant and the loss tangent of modified ceramics were measured as a function of temperature (20–180 °C) and frequency (100 Hz-1MHz) for different concentrations of additives. The obtained results have shown that the dielectric constant at, both, room temperature (εr) and Curie temperature (εrmax), decreased as the concentration of Nb5+ increased. Thus, the highest values for the dielectric constant at room temperature (εr = 6648) as well as at Curie temperature (εrmax = 7680) were measured for the 0.1Nb/Mn–BaTiO3 samples sintered at 1350 °C. The highly doped BaTiO3 ceramics were found to exhibit lower values of the dielectric constant and low dielectric losses at room temperature. In these samples, stable dielectric permittivity with a flat dielectric behavior over a wide temperature range is observed. The Curie constant for all series of samples decreases with an increase of dopant concentration and the highest values were measured from samples doped with 0.1 at% Nb. The effect of additives on the Curie constant change is more pronounced at higher sintering temperatures. The analysis of the critical nonlinearity exponent (γ = 1.07–1.27), for lower dopant concentrations, shows a sharp phase transformation. For samples with increased Nb content, the degree of nonlinearity γ is higher indicating a diffuse phase transformation.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Niobium doping effect on BaTiO3 structure and dielectric properties",
pages = "8154-8164",
volume = "46",
number = "6",
doi = "10.1016/j.ceramint.2019.12.043",
url = "https://hdl.handle.net/21.15107/rcub_dais_8964"
}
Paunović, V., Mitić, V. V., Đorđević, M.,& Prijić, Z. (2020). Niobium doping effect on BaTiO3 structure and dielectric properties.
Ceramics International
Elsevier., 46(6), 8154-8164.
https://doi.org/10.1016/j.ceramint.2019.12.043
Paunović V, Mitić VV, Đorđević M, Prijić Z. Niobium doping effect on BaTiO3 structure and dielectric properties. Ceramics International. 2020;46(6):8154-8164.
doi:10.1016/j.ceramint.2019.12.043.
Paunović Vesna, Mitić Vojislav V., Đorđević M., Prijić Z., "Niobium doping effect on BaTiO3 structure and dielectric properties" Ceramics International, 46, no. 6 (2020):8154-8164,
https://doi.org/10.1016/j.ceramint.2019.12.043 .
4
3
2

Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders

Spasojević, Miroslav; Ranđić, Siniša; Maričić, Aleksa; Trišović, Tomislav; Spasojević, Milica

(Springer, 2020)

TY  - JOUR
AU  - Spasojević, Miroslav
AU  - Ranđić, Siniša
AU  - Maričić, Aleksa
AU  - Trišović, Tomislav
AU  - Spasojević, Milica
PY  - 2020
AB  - Nanostructured Ni-Fe-W-Cu alloy powders were electrodeposited from an alkaline ammonium citrate solution on a titanium cathode. Powder particles were dendrite- and cauliflower-shaped. The dendritic particles had a high density of branches made up of interconnected globules. XRD analysis showed that the powder contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. As the deposition current density increased, the mean nanocrystal size decreased, and the mean value of internal microstrain and the total weight percent of Fe and Ni in the alloy increased. The powders deposited at higher current densities exhibited higher magnetization. During annealing at temperatures up to 460 °C, the powders underwent short-range ordering, which caused an increase in magnetization, whereas at temperatures above 460 °C, the magnetization decreased due to the formation of large FCC crystalline grains.
PB  - Springer
T2  - Science of Sintering
T1  - Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders
SP  - 109
EP  - 121
VL  - 52
IS  - 1
DO  - 10.2298/SOS2001109S
UR  - https://hdl.handle.net/21.15107/rcub_dais_9451
ER  - 
@article{
author = "Spasojević, Miroslav and Ranđić, Siniša and Maričić, Aleksa and Trišović, Tomislav and Spasojević, Milica",
year = "2020",
abstract = "Nanostructured Ni-Fe-W-Cu alloy powders were electrodeposited from an alkaline ammonium citrate solution on a titanium cathode. Powder particles were dendrite- and cauliflower-shaped. The dendritic particles had a high density of branches made up of interconnected globules. XRD analysis showed that the powder contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. As the deposition current density increased, the mean nanocrystal size decreased, and the mean value of internal microstrain and the total weight percent of Fe and Ni in the alloy increased. The powders deposited at higher current densities exhibited higher magnetization. During annealing at temperatures up to 460 °C, the powders underwent short-range ordering, which caused an increase in magnetization, whereas at temperatures above 460 °C, the magnetization decreased due to the formation of large FCC crystalline grains.",
publisher = "Springer",
journal = "Science of Sintering",
title = "Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders",
pages = "109-121",
volume = "52",
number = "1",
doi = "10.2298/SOS2001109S",
url = "https://hdl.handle.net/21.15107/rcub_dais_9451"
}
Spasojević, M., Ranđić, S., Maričić, A., Trišović, T.,& Spasojević, M. (2020). Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders.
Science of Sintering
Springer., 52(1), 109-121.
https://doi.org/10.2298/SOS2001109S
Spasojević M, Ranđić S, Maričić A, Trišović T, Spasojević M. Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders. Science of Sintering. 2020;52(1):109-121.
doi:10.2298/SOS2001109S.
Spasojević Miroslav, Ranđić Siniša, Maričić Aleksa, Trišović Tomislav, Spasojević Milica, "Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders" Science of Sintering, 52, no. 1 (2020):109-121,
https://doi.org/10.2298/SOS2001109S .
1
1
1

The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers

Mitić, Vojislav V.; Lazović, Goran; Lu, Chun-An; Paunović, Vesna; Radović, Ivana; Stajčić, Aleksandar; Vlahović, Branislav

(Basel : MDPI, 2020)

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Lazović, Goran
AU  - Lu, Chun-An
AU  - Paunović, Vesna
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Vlahović, Branislav
PY  - 2020
AB  - The BaTiO3 ceramics applications based on electronic properties have very high gradient scientific and industrial-technological interests. Our scientific research has been based on nano BaTiO3 modified with Yttrium based organometallic salt (MOD-Y). The samples have been consolidated at a sintering temperature of 1350 °C. Within the study, the new frontiers for different electronic properties between the layers of BaTiO3 grains have been introduced. The research target was grain boundary investigations and the influence on dielectric properties. After scanning electron microscopy and dielectric measurements, it has been established that modified BaTiO3 samples with larger grains showed a better compact state that led to a higher dielectric constant value. DC bias stability was also investigated and showed a connection between the grain size and capacitance stability. Analyses of functions that could approximate experimental curves were successfully employed. Practical application of fractal corrections was performed, based on surface (αs) and pore size (αp) corrections, which resulted in obtainment of the relation between the capacitance and Curie temperature. Successful introduction of fractal corrections for capacitance-Curie temperature dependence for a set of experimental data is an important step towards further miniaturization of intergranular capacitors. © 2020 by the authors.
PB  - Basel : MDPI
T2  - Applied Sciences (Switzerland)
T1  - The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers
SP  - 3485
VL  - 10
IS  - 10
DO  - 10.3390/app10103485
UR  - https://hdl.handle.net/21.15107/rcub_dais_8957
ER  - 
@article{
author = "Mitić, Vojislav V. and Lazović, Goran and Lu, Chun-An and Paunović, Vesna and Radović, Ivana and Stajčić, Aleksandar and Vlahović, Branislav",
year = "2020",
abstract = "The BaTiO3 ceramics applications based on electronic properties have very high gradient scientific and industrial-technological interests. Our scientific research has been based on nano BaTiO3 modified with Yttrium based organometallic salt (MOD-Y). The samples have been consolidated at a sintering temperature of 1350 °C. Within the study, the new frontiers for different electronic properties between the layers of BaTiO3 grains have been introduced. The research target was grain boundary investigations and the influence on dielectric properties. After scanning electron microscopy and dielectric measurements, it has been established that modified BaTiO3 samples with larger grains showed a better compact state that led to a higher dielectric constant value. DC bias stability was also investigated and showed a connection between the grain size and capacitance stability. Analyses of functions that could approximate experimental curves were successfully employed. Practical application of fractal corrections was performed, based on surface (αs) and pore size (αp) corrections, which resulted in obtainment of the relation between the capacitance and Curie temperature. Successful introduction of fractal corrections for capacitance-Curie temperature dependence for a set of experimental data is an important step towards further miniaturization of intergranular capacitors. © 2020 by the authors.",
publisher = "Basel : MDPI",
journal = "Applied Sciences (Switzerland)",
title = "The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers",
pages = "3485",
volume = "10",
number = "10",
doi = "10.3390/app10103485",
url = "https://hdl.handle.net/21.15107/rcub_dais_8957"
}
Mitić, V. V., Lazović, G., Lu, C., Paunović, V., Radović, I., Stajčić, A.,& Vlahović, B. (2020). The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers.
Applied Sciences (Switzerland)
Basel : MDPI., 10(10), 3485.
https://doi.org/10.3390/app10103485
Mitić VV, Lazović G, Lu C, Paunović V, Radović I, Stajčić A, Vlahović B. The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers. Applied Sciences (Switzerland). 2020;10(10):3485.
doi:10.3390/app10103485.
Mitić Vojislav V., Lazović Goran, Lu Chun-An, Paunović Vesna, Radović Ivana, Stajčić Aleksandar, Vlahović Branislav, "The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers" Applied Sciences (Switzerland), 10, no. 10 (2020):3485,
https://doi.org/10.3390/app10103485 .
1
1
1

Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

Vujančević, Jelena; Andričević, Pavao; Bjelajac, Anđelika; Đokić, Veljko; Popović, Maja; Rakočević, Zlatko; Horváth, Endre; Kollár, Márton; Náfrádi, Bálint; Schiller, Andreas; Domanski, Konrad; Forró, Laszlo; Pavlović, Vera P.; Janaćković, Đorđe

(Elsevier, 2019)

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Popović, Maja
AU  - Rakočević, Zlatko
AU  - Horváth, Endre
AU  - Kollár, Márton
AU  - Náfrádi, Bálint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forró, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe
PY  - 2019
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
PB  - Elsevier
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
SP  - 10013
EP  - 10020
VL  - 45
IS  - 8
DO  - 10.1016/j.ceramint.2019.02.045
UR  - https://hdl.handle.net/21.15107/rcub_dais_5084
ER  - 
@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko and Popović, Maja and Rakočević, Zlatko and Horváth, Endre and Kollár, Márton and Náfrádi, Bálint and Schiller, Andreas and Domanski, Konrad and Forró, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
pages = "10013-10020",
volume = "45",
number = "8",
doi = "10.1016/j.ceramint.2019.02.045",
url = "https://hdl.handle.net/21.15107/rcub_dais_5084"
}
Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V. P.,& Janaćković, Đ. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping.
Ceramics International
Elsevier., 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045
Vujančević J, Andričević P, Bjelajac A, Đokić V, Popović M, Rakočević Z, Horváth E, Kollár M, Náfrádi B, Schiller A, Domanski K, Forró L, Pavlović VP, Janaćković Đ. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045.
Vujančević Jelena, Andričević Pavao, Bjelajac Anđelika, Đokić Veljko, Popović Maja, Rakočević Zlatko, Horváth Endre, Kollár Márton, Náfrádi Bálint, Schiller Andreas, Domanski Konrad, Forró Laszlo, Pavlović Vera P., Janaćković Đorđe, "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 .
3
2
1

Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

Vujančević, Jelena; Andričević, Pavao; Bjelajac, Anđelika; Đokić, Veljko; Popović, Maja; Rakočević, Zlatko; Horváth, Endre; Kollár, Márton; Náfrádi, Bálint; Schiller, Andreas; Domanski, Konrad; Forró, Laszlo; Pavlović, Vera P.; Janaćković, Đorđe

(Elsevier, 2019)

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Popović, Maja
AU  - Rakočević, Zlatko
AU  - Horváth, Endre
AU  - Kollár, Márton
AU  - Náfrádi, Bálint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forró, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe
PY  - 2019
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
PB  - Elsevier
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
SP  - 10013
EP  - 10020
VL  - 45
IS  - 8
DO  - 10.1016/j.ceramint.2019.02.045
UR  - https://hdl.handle.net/21.15107/rcub_dais_5765
ER  - 
@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko and Popović, Maja and Rakočević, Zlatko and Horváth, Endre and Kollár, Márton and Náfrádi, Bálint and Schiller, Andreas and Domanski, Konrad and Forró, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
pages = "10013-10020",
volume = "45",
number = "8",
doi = "10.1016/j.ceramint.2019.02.045",
url = "https://hdl.handle.net/21.15107/rcub_dais_5765"
}
Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V. P.,& Janaćković, Đ. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping.
Ceramics International
Elsevier., 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045
Vujančević J, Andričević P, Bjelajac A, Đokić V, Popović M, Rakočević Z, Horváth E, Kollár M, Náfrádi B, Schiller A, Domanski K, Forró L, Pavlović VP, Janaćković Đ. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045.
Vujančević Jelena, Andričević Pavao, Bjelajac Anđelika, Đokić Veljko, Popović Maja, Rakočević Zlatko, Horváth Endre, Kollár Márton, Náfrádi Bálint, Schiller Andreas, Domanski Konrad, Forró Laszlo, Pavlović Vera P., Janaćković Đorđe, "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 .
3
2
1

Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045

Vujančević, Jelena; Andričević, Pavao; Bjelajac, Anđelika; Đokić, Veljko; Popović, Maja; Rakočević, Zlatko; Horváth, Endre; Kollár, Márton; Náfrádi, Bálint; Schiller, Andreas; Domanski, Konrad; Forró, Laszlo; Pavlović, Vera P.; Janaćković, Đorđe

(2019)

TY  - BOOK
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Popović, Maja
AU  - Rakočević, Zlatko
AU  - Horváth, Endre
AU  - Kollár, Márton
AU  - Náfrádi, Bálint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forró, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe
PY  - 2019
T2  - Ceramics International
T1  - Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045
UR  - https://hdl.handle.net/21.15107/rcub_dais_5969
ER  - 
@book{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko and Popović, Maja and Rakočević, Zlatko and Horváth, Endre and Kollár, Márton and Náfrádi, Bálint and Schiller, Andreas and Domanski, Konrad and Forró, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe",
year = "2019",
journal = "Ceramics International",
title = "Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045",
url = "https://hdl.handle.net/21.15107/rcub_dais_5969"
}
Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V. P.,& Janaćković, Đ. (2019). Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045.
Ceramics International.
Vujančević J, Andričević P, Bjelajac A, Đokić V, Popović M, Rakočević Z, Horváth E, Kollár M, Náfrádi B, Schiller A, Domanski K, Forró L, Pavlović VP, Janaćković Đ. Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045. Ceramics International. 2019;.
Vujančević Jelena, Andričević Pavao, Bjelajac Anđelika, Đokić Veljko, Popović Maja, Rakočević Zlatko, Horváth Endre, Kollár Márton, Náfrádi Bálint, Schiller Andreas, Domanski Konrad, Forró Laszlo, Pavlović Vera P., Janaćković Đorđe, "Supporting information for the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., Horváth, E., Kollár, M., Náfrádi, B., Schiller, A., Domanski, K., Forró, L., Pavlović, V., Janaćković, Đ., 2019. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International 45, 10013–10020. https://doi.org/10.1016/j.ceramint.2019.02.045" Ceramics International (2019)

Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering

Obradović, Nina; Pavlović, Vera P.; Kachlik, Martin; Maca, Karel; Olćan, Dragan; Đorđević, Antonije; Tshantshapanyan, Ani; Vlahović, Branislav; Pavlović, Vladimir B.

(Taylor and Francis, 2019)

TY  - JOUR
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Tshantshapanyan, Ani
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Sintering of pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with the addition of 5 mass % TeO2 was studied. Green bodies were prepared from powder mixtures mechanically activated in a high-energy planetary mill, shaped by uniaxial (20 MPa) and cold isostatic pressing (1000 MPa). The pressure-less sintering of these specimens was performed at 1350°C for 1 h. High relative density over 95% of the theoretical value was obtained through solid-state reaction and pressure-less sintering of powder activated for 40 min, and for the first time reported in the literature. Phase composition and microstructures of sintered samples were determined by XRD and SEM, coupled with EDS mapping. The real part of the complex relative permittivity of the samples was measured at 200 MHz. The loss tangent of all samples was below the resolution of the measurement setup. A strong correlation between the relative permittivity and the density agrees with previously published data.
PB  - Taylor and Francis
T2  - Advances in Applied Ceramics
T1  - Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering
SP  - 241
EP  - 248
VL  - 118
IS  - 5
DO  - 10.1080/17436753.2018.1548150
UR  - https://hdl.handle.net/21.15107/rcub_dais_4557
ER  - 
@article{
author = "Obradović, Nina and Pavlović, Vera P. and Kachlik, Martin and Maca, Karel and Olćan, Dragan and Đorđević, Antonije and Tshantshapanyan, Ani and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2019",
abstract = "Sintering of pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with the addition of 5 mass % TeO2 was studied. Green bodies were prepared from powder mixtures mechanically activated in a high-energy planetary mill, shaped by uniaxial (20 MPa) and cold isostatic pressing (1000 MPa). The pressure-less sintering of these specimens was performed at 1350°C for 1 h. High relative density over 95% of the theoretical value was obtained through solid-state reaction and pressure-less sintering of powder activated for 40 min, and for the first time reported in the literature. Phase composition and microstructures of sintered samples were determined by XRD and SEM, coupled with EDS mapping. The real part of the complex relative permittivity of the samples was measured at 200 MHz. The loss tangent of all samples was below the resolution of the measurement setup. A strong correlation between the relative permittivity and the density agrees with previously published data.",
publisher = "Taylor and Francis",
journal = "Advances in Applied Ceramics",
title = "Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering",
pages = "241-248",
volume = "118",
number = "5",
doi = "10.1080/17436753.2018.1548150",
url = "https://hdl.handle.net/21.15107/rcub_dais_4557"
}
Obradović, N., Pavlović, V. P., Kachlik, M., Maca, K., Olćan, D., Đorđević, A., Tshantshapanyan, A., Vlahović, B.,& Pavlović, V. B. (2019). Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering.
Advances in Applied Ceramics
Taylor and Francis., 118(5), 241-248.
https://doi.org/10.1080/17436753.2018.1548150
Obradović N, Pavlović VP, Kachlik M, Maca K, Olćan D, Đorđević A, Tshantshapanyan A, Vlahović B, Pavlović VB. Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering. Advances in Applied Ceramics. 2019;118(5):241-248.
doi:10.1080/17436753.2018.1548150.
Obradović Nina, Pavlović Vera P., Kachlik Martin, Maca Karel, Olćan Dragan, Đorđević Antonije, Tshantshapanyan Ani, Vlahović Branislav, Pavlović Vladimir B., "Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering" Advances in Applied Ceramics, 118, no. 5 (2019):241-248,
https://doi.org/10.1080/17436753.2018.1548150 .
3
3
3

Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure

Filipović, Suzana; Pavlović, Vera P.; Mitrić, Miodrag; Lević, Steva; Mitrović, Nebojša; Maričić, Aleksa; Vlahović, Branislav; Pavlović, Vladimir B.

(Springer, 2019)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Pavlović, Vera P.
AU  - Mitrić, Miodrag
AU  - Lević, Steva
AU  - Mitrović, Nebojša
AU  - Maričić, Aleksa
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Multiferroic materials attracted a lot of attention in recent years because of their significant scientific interest and technological applications. The multiferroic core/shell powders have a better connectivity between the phases, resulting in superior dielectric and magneto electric properties. In this study, the influence of preparation condition on structure and properties of BaTiO3/α-Fe2O3 core/shell composite materials was examined. The five samples were obtained by varying synthesis conditions, such as synthesized method (co-precipitation and sonochemical method) and pH values of solution. XRD and Raman spectroscopy analyses were performed in order to determine phase composition and structural changes within samples. Morphology modifications were examined by SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and electrical properties was detected and explained.
PB  - Springer
T2  - Journal of Advanced Ceramics
T1  - Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure
SP  - 133
EP  - 147
VL  - 8
IS  - 1
DO  - 10.1007/s40145-018-0301-5
UR  - https://hdl.handle.net/21.15107/rcub_dais_5271
ER  - 
@article{
author = "Filipović, Suzana and Pavlović, Vera P. and Mitrić, Miodrag and Lević, Steva and Mitrović, Nebojša and Maričić, Aleksa and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2019",
abstract = "Multiferroic materials attracted a lot of attention in recent years because of their significant scientific interest and technological applications. The multiferroic core/shell powders have a better connectivity between the phases, resulting in superior dielectric and magneto electric properties. In this study, the influence of preparation condition on structure and properties of BaTiO3/α-Fe2O3 core/shell composite materials was examined. The five samples were obtained by varying synthesis conditions, such as synthesized method (co-precipitation and sonochemical method) and pH values of solution. XRD and Raman spectroscopy analyses were performed in order to determine phase composition and structural changes within samples. Morphology modifications were examined by SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and electrical properties was detected and explained.",
publisher = "Springer",
journal = "Journal of Advanced Ceramics",
title = "Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure",
pages = "133-147",
volume = "8",
number = "1",
doi = "10.1007/s40145-018-0301-5",
url = "https://hdl.handle.net/21.15107/rcub_dais_5271"
}
Filipović, S., Pavlović, V. P., Mitrić, M., Lević, S., Mitrović, N., Maričić, A., Vlahović, B.,& Pavlović, V. B. (2019). Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure.
Journal of Advanced Ceramics
Springer., 8(1), 133-147.
https://doi.org/10.1007/s40145-018-0301-5
Filipović S, Pavlović VP, Mitrić M, Lević S, Mitrović N, Maričić A, Vlahović B, Pavlović VB. Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure. Journal of Advanced Ceramics. 2019;8(1):133-147.
doi:10.1007/s40145-018-0301-5.
Filipović Suzana, Pavlović Vera P., Mitrić Miodrag, Lević Steva, Mitrović Nebojša, Maričić Aleksa, Vlahović Branislav, Pavlović Vladimir B., "Synthesis and characterization of BaTiO3/α-Fe2O3 core/shell structure" Journal of Advanced Ceramics, 8, no. 1 (2019):133-147,
https://doi.org/10.1007/s40145-018-0301-5 .
1
4
3
6

Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal

Rusmirović, Jelena; Obradović, Nina; Perendija, Jovana; Umićević, Ana; Kapidžić, Ana; Vlahović, Branislav; Pavlović, Vera; Marinković, Aleksandar D.; Pavlović, Vladimir B.

(Springer, 2019)

TY  - JOUR
AU  - Rusmirović, Jelena
AU  - Obradović, Nina
AU  - Perendija, Jovana
AU  - Umićević, Ana
AU  - Kapidžić, Ana
AU  - Vlahović, Branislav
AU  - Pavlović, Vera
AU  - Marinković, Aleksandar D.
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Iron oxide, in the form of magnetite (MG)–functionalized porous wollastonite (WL), was used as an adsorbent for heavy metal ions (cadmium and nickel) and oxyanions (chromate and phosphate) removal from water. The porous WL was synthesized from calcium carbonate and siloxane by controlled sintering process using low molecular weight submicrosized poly(methyl methacrylate) as a pore-forming agent. The precipitation of MG nanoparticles was carried out directly by a polyol-medium solvothermal method or via branched amino/carboxylic acid cross-linker by solvent/nonsolvent method producing WL/MG and WL-γ-APS/MG adsorbents, respectively. The structure/properties of MG functionalized WL was confirmed by applying FTIR, Raman, XRD, Mössbauer, and SEM analysis. Higher adsorption capacities of 73.126, 66.144, 64.168, and 63.456 mg g−1 for WL-γ-APS/MG in relation to WL/MG of 55.450, 52.019, 48.132, and 47.382 mg g−1 for Cd2+, Ni2+, phosphate, and chromate, respectively, were obtained using nonlinear Langmuir model fitting. Adsorption phenomena were analyzed using monolayer statistical physics model for single adsorption with one energy. Kinetic study showed exceptionally higher pseudo-second-order rate constants for WL-γ-APS/MG, e.g., 1.17–13.4 times, with respect to WL/MG indicating importance of both WL surface modification and controllable precipitation of MG on WL-γ-APS.
PB  - Springer
T2  - Environmental Science and Pollution Research
T1  - Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal
SP  - 12379
EP  - 12398
VL  - 26
IS  - 12
DO  - 10.1007/s11356-019-04625-0
UR  - https://hdl.handle.net/21.15107/rcub_dais_5273
ER  - 
@article{
author = "Rusmirović, Jelena and Obradović, Nina and Perendija, Jovana and Umićević, Ana and Kapidžić, Ana and Vlahović, Branislav and Pavlović, Vera and Marinković, Aleksandar D. and Pavlović, Vladimir B.",
year = "2019",
abstract = "Iron oxide, in the form of magnetite (MG)–functionalized porous wollastonite (WL), was used as an adsorbent for heavy metal ions (cadmium and nickel) and oxyanions (chromate and phosphate) removal from water. The porous WL was synthesized from calcium carbonate and siloxane by controlled sintering process using low molecular weight submicrosized poly(methyl methacrylate) as a pore-forming agent. The precipitation of MG nanoparticles was carried out directly by a polyol-medium solvothermal method or via branched amino/carboxylic acid cross-linker by solvent/nonsolvent method producing WL/MG and WL-γ-APS/MG adsorbents, respectively. The structure/properties of MG functionalized WL was confirmed by applying FTIR, Raman, XRD, Mössbauer, and SEM analysis. Higher adsorption capacities of 73.126, 66.144, 64.168, and 63.456 mg g−1 for WL-γ-APS/MG in relation to WL/MG of 55.450, 52.019, 48.132, and 47.382 mg g−1 for Cd2+, Ni2+, phosphate, and chromate, respectively, were obtained using nonlinear Langmuir model fitting. Adsorption phenomena were analyzed using monolayer statistical physics model for single adsorption with one energy. Kinetic study showed exceptionally higher pseudo-second-order rate constants for WL-γ-APS/MG, e.g., 1.17–13.4 times, with respect to WL/MG indicating importance of both WL surface modification and controllable precipitation of MG on WL-γ-APS.",
publisher = "Springer",
journal = "Environmental Science and Pollution Research",
title = "Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal",
pages = "12379-12398",
volume = "26",
number = "12",
doi = "10.1007/s11356-019-04625-0",
url = "https://hdl.handle.net/21.15107/rcub_dais_5273"
}
Rusmirović, J., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A. D.,& Pavlović, V. B. (2019). Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal.
Environmental Science and Pollution Research
Springer., 26(12), 12379-12398.
https://doi.org/10.1007/s11356-019-04625-0
Rusmirović J, Obradović N, Perendija J, Umićević A, Kapidžić A, Vlahović B, Pavlović V, Marinković AD, Pavlović VB. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environmental Science and Pollution Research. 2019;26(12):12379-12398.
doi:10.1007/s11356-019-04625-0.
Rusmirović Jelena, Obradović Nina, Perendija Jovana, Umićević Ana, Kapidžić Ana, Vlahović Branislav, Pavlović Vera, Marinković Aleksandar D., Pavlović Vladimir B., "Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal" Environmental Science and Pollution Research, 26, no. 12 (2019):12379-12398,
https://doi.org/10.1007/s11356-019-04625-0 .
1
4
6
6

Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal

Rusmirović, Jelena; Obradović, Nina; Perendija, Jovana; Umićević, Ana; Kapidžić, Ana; Vlahović, Branislav; Pavlović, Vera P.; Marinković, Aleksandar D.; Pavlović, Vladimir B.

(Springer, 2019)

TY  - JOUR
AU  - Rusmirović, Jelena
AU  - Obradović, Nina
AU  - Perendija, Jovana
AU  - Umićević, Ana
AU  - Kapidžić, Ana
AU  - Vlahović, Branislav
AU  - Pavlović, Vera P.
AU  - Marinković, Aleksandar D.
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Iron oxide, in the form of magnetite (MG)–functionalized porous wollastonite (WL), was used as an adsorbent for heavy metal ions (cadmium and nickel) and oxyanions (chromate and phosphate) removal from water. The porous WL was synthesized from calcium carbonate and siloxane by controlled sintering process using low molecular weight submicrosized poly(methyl methacrylate) as a pore-forming agent. The precipitation of MG nanoparticles was carried out directly by a polyol-medium solvothermal method or via branched amino/carboxylic acid cross-linker by solvent/nonsolvent method producing WL/MG and WL-γ-APS/MG adsorbents, respectively. The structure/properties of MG functionalized WL was confirmed by applying FTIR, Raman, XRD, Mössbauer, and SEM analysis. Higher adsorption capacities of 73.126, 66.144, 64.168, and 63.456 mg g−1 for WL-γ-APS/MG in relation to WL/MG of 55.450, 52.019, 48.132, and 47.382 mg g−1 for Cd2+, Ni2+, phosphate, and chromate, respectively, were obtained using nonlinear Langmuir model fitting. Adsorption phenomena were analyzed using monolayer statistical physics model for single adsorption with one energy. Kinetic study showed exceptionally higher pseudo-second-order rate constants for WL-γ-APS/MG, e.g., 1.17–13.4 times, with respect to WL/MG indicating importance of both WL surface modification and controllable precipitation of MG on WL-γ-APS.
PB  - Springer
T2  - Environmental Science and Pollution Research
T1  - Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal
SP  - 12379
EP  - 12398
VL  - 26
IS  - 12
DO  - 10.1007/s11356-019-04625-0
UR  - https://hdl.handle.net/21.15107/rcub_dais_5764
ER  - 
@article{
author = "Rusmirović, Jelena and Obradović, Nina and Perendija, Jovana and Umićević, Ana and Kapidžić, Ana and Vlahović, Branislav and Pavlović, Vera P. and Marinković, Aleksandar D. and Pavlović, Vladimir B.",
year = "2019",
abstract = "Iron oxide, in the form of magnetite (MG)–functionalized porous wollastonite (WL), was used as an adsorbent for heavy metal ions (cadmium and nickel) and oxyanions (chromate and phosphate) removal from water. The porous WL was synthesized from calcium carbonate and siloxane by controlled sintering process using low molecular weight submicrosized poly(methyl methacrylate) as a pore-forming agent. The precipitation of MG nanoparticles was carried out directly by a polyol-medium solvothermal method or via branched amino/carboxylic acid cross-linker by solvent/nonsolvent method producing WL/MG and WL-γ-APS/MG adsorbents, respectively. The structure/properties of MG functionalized WL was confirmed by applying FTIR, Raman, XRD, Mössbauer, and SEM analysis. Higher adsorption capacities of 73.126, 66.144, 64.168, and 63.456 mg g−1 for WL-γ-APS/MG in relation to WL/MG of 55.450, 52.019, 48.132, and 47.382 mg g−1 for Cd2+, Ni2+, phosphate, and chromate, respectively, were obtained using nonlinear Langmuir model fitting. Adsorption phenomena were analyzed using monolayer statistical physics model for single adsorption with one energy. Kinetic study showed exceptionally higher pseudo-second-order rate constants for WL-γ-APS/MG, e.g., 1.17–13.4 times, with respect to WL/MG indicating importance of both WL surface modification and controllable precipitation of MG on WL-γ-APS.",
publisher = "Springer",
journal = "Environmental Science and Pollution Research",
title = "Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal",
pages = "12379-12398",
volume = "26",
number = "12",
doi = "10.1007/s11356-019-04625-0",
url = "https://hdl.handle.net/21.15107/rcub_dais_5764"
}
Rusmirović, J., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V. P., Marinković, A. D.,& Pavlović, V. B. (2019). Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal.
Environmental Science and Pollution Research
Springer., 26(12), 12379-12398.
https://doi.org/10.1007/s11356-019-04625-0
Rusmirović J, Obradović N, Perendija J, Umićević A, Kapidžić A, Vlahović B, Pavlović VP, Marinković AD, Pavlović VB. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environmental Science and Pollution Research. 2019;26(12):12379-12398.
doi:10.1007/s11356-019-04625-0.
Rusmirović Jelena, Obradović Nina, Perendija Jovana, Umićević Ana, Kapidžić Ana, Vlahović Branislav, Pavlović Vera P., Marinković Aleksandar D., Pavlović Vladimir B., "Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal" Environmental Science and Pollution Research, 26, no. 12 (2019):12379-12398,
https://doi.org/10.1007/s11356-019-04625-0 .
1
4
6
6

Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0

Rusmirović, Jelena; Obradović, Nina; Perendija, Jovana; Umićević, Ana; Kapidžić, Ana; Vlahović, Branislav; Pavlović, Vera P.; Marinković, Aleksandar D.; Pavlović, Vladimir B.

(Springer, 2019)

TY  - BOOK
AU  - Rusmirović, Jelena
AU  - Obradović, Nina
AU  - Perendija, Jovana
AU  - Umićević, Ana
AU  - Kapidžić, Ana
AU  - Vlahović, Branislav
AU  - Pavlović, Vera P.
AU  - Marinković, Aleksandar D.
AU  - Pavlović, Vladimir B.
PY  - 2019
PB  - Springer
T2  - Environmental Science and Pollution Research
T1  - Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0
UR  - https://hdl.handle.net/21.15107/rcub_dais_5805
ER  - 
@book{
author = "Rusmirović, Jelena and Obradović, Nina and Perendija, Jovana and Umićević, Ana and Kapidžić, Ana and Vlahović, Branislav and Pavlović, Vera P. and Marinković, Aleksandar D. and Pavlović, Vladimir B.",
year = "2019",
publisher = "Springer",
journal = "Environmental Science and Pollution Research",
title = "Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0",
url = "https://hdl.handle.net/21.15107/rcub_dais_5805"
}
Rusmirović, J., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V. P., Marinković, A. D.,& Pavlović, V. B. (2019). Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0.
Environmental Science and Pollution Research
Springer..
Rusmirović J, Obradović N, Perendija J, Umićević A, Kapidžić A, Vlahović B, Pavlović VP, Marinković AD, Pavlović VB. Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0. Environmental Science and Pollution Research. 2019;.
Rusmirović Jelena, Obradović Nina, Perendija Jovana, Umićević Ana, Kapidžić Ana, Vlahović Branislav, Pavlović Vera P., Marinković Aleksandar D., Pavlović Vladimir B., "Supplementary material for the article: Rusmirović, J.D., Obradović, N., Perendija, J., Umićević, A., Kapidžić, A., Vlahović, B., Pavlović, V., Marinković, A.D., Pavlović, V.B., 2019. Controllable synthesis of Fe3O4-wollastonite adsorbents for efficient heavy metal ions/oxyanions removal. Environ Sci Pollut Res 26, 12379–12398. https://doi.org/10.1007/s11356-019-04625-0" Environmental Science and Pollution Research (2019)

Structure and enhanced antimicrobial activity of mechanically activated nano TiO2

Pavlović, Vera P.; Vujančević, Jelena; Mašković, Pavle; Ćirković, Jovana; Papan, Jelena M.; Kosanović, Darko; Dramićanin, Miroslav; Petrović, Predrag B.; Vlahović, Branislav; Pavlović, Vladimir B.

(Wiley, 2019)

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Vujančević, Jelena
AU  - Mašković, Pavle
AU  - Ćirković, Jovana
AU  - Papan, Jelena M.
AU  - Kosanović, Darko
AU  - Dramićanin, Miroslav
AU  - Petrović, Predrag B.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Titanium dioxide is a photocatalyst, known not only for its ability to oxidize organic contaminants, but also for its antimicrobial properties. In this article, significant enhancement of the antimicrobial activity of TiO2 (up to 32 times) was demonstrated after its activation by ball milling. The antimicrobial activity was analyzed for one fungal and 13 bacterial ATCC strains using the microdilution method and recording the minimum inhibitory concentration (MIC) values. In order to further investigate the correlation between the mechanical activation of TiO2 and its antimicrobial activity, the structure, morphology and phase composition of the material were studied by means of Electron Microscopy, X-ray diffraction and nitrogen adsorption-desorption measurements. UV-Vis diffuse reflectance spectra were recorded and the Kubelka-Munk function was applied to convert reflectance into the equivalent band gap energy (Eg) and, consequently, to investigate changes in the Eg value. X-ray photoelectron spectroscopy was used to analyze the influence of mechanical activation on the Ti 2p and O 1s spectra. The presented results are expected to enable the development of more sustainable and effective advanced TiO2-based materials with antimicrobial properties that could be used in numerous green technology applications.
PB  - Wiley
T2  - Journal of the American Ceramic Society
T1  - Structure and enhanced antimicrobial activity of mechanically activated nano TiO2
SP  - 7735
EP  - 7745
VL  - 102
IS  - 12
DO  - 10.1111/jace.16668
UR  - https://hdl.handle.net/21.15107/rcub_dais_6453
ER  - 
@article{
author = "Pavlović, Vera P. and Vujančević, Jelena and Mašković, Pavle and Ćirković, Jovana and Papan, Jelena M. and Kosanović, Darko and Dramićanin, Miroslav and Petrović, Predrag B. and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2019",
abstract = "Titanium dioxide is a photocatalyst, known not only for its ability to oxidize organic contaminants, but also for its antimicrobial properties. In this article, significant enhancement of the antimicrobial activity of TiO2 (up to 32 times) was demonstrated after its activation by ball milling. The antimicrobial activity was analyzed for one fungal and 13 bacterial ATCC strains using the microdilution method and recording the minimum inhibitory concentration (MIC) values. In order to further investigate the correlation between the mechanical activation of TiO2 and its antimicrobial activity, the structure, morphology and phase composition of the material were studied by means of Electron Microscopy, X-ray diffraction and nitrogen adsorption-desorption measurements. UV-Vis diffuse reflectance spectra were recorded and the Kubelka-Munk function was applied to convert reflectance into the equivalent band gap energy (Eg) and, consequently, to investigate changes in the Eg value. X-ray photoelectron spectroscopy was used to analyze the influence of mechanical activation on the Ti 2p and O 1s spectra. The presented results are expected to enable the development of more sustainable and effective advanced TiO2-based materials with antimicrobial properties that could be used in numerous green technology applications.",
publisher = "Wiley",
journal = "Journal of the American Ceramic Society",
title = "Structure and enhanced antimicrobial activity of mechanically activated nano TiO2",
pages = "7735-7745",
volume = "102",
number = "12",
doi = "10.1111/jace.16668",
url = "https://hdl.handle.net/21.15107/rcub_dais_6453"
}
Pavlović, V. P., Vujančević, J., Mašković, P., Ćirković, J., Papan, J. M., Kosanović, D., Dramićanin, M., Petrović, P. B., Vlahović, B.,& Pavlović, V. B. (2019). Structure and enhanced antimicrobial activity of mechanically activated nano TiO2.
Journal of the American Ceramic Society
Wiley., 102(12), 7735-7745.
https://doi.org/10.1111/jace.16668
Pavlović VP, Vujančević J, Mašković P, Ćirković J, Papan JM, Kosanović D, Dramićanin M, Petrović PB, Vlahović B, Pavlović VB. Structure and enhanced antimicrobial activity of mechanically activated nano TiO2. Journal of the American Ceramic Society. 2019;102(12):7735-7745.
doi:10.1111/jace.16668.
Pavlović Vera P., Vujančević Jelena, Mašković Pavle, Ćirković Jovana, Papan Jelena M., Kosanović Darko, Dramićanin Miroslav, Petrović Predrag B., Vlahović Branislav, Pavlović Vladimir B., "Structure and enhanced antimicrobial activity of mechanically activated nano TiO2" Journal of the American Ceramic Society, 102, no. 12 (2019):7735-7745,
https://doi.org/10.1111/jace.16668 .
7
2
3

Structure and enhanced antimicrobial activity of mechanically activated nano TiO2

Pavlović, Vera P.; Vujančević, Jelena; Mašković, Pavle; Ćirković, Jovana; Papan, Jelena M.; Kosanović, Darko; Dramićanin, Miroslav; Petrović, Predrag B.; Vlahović, Branislav; Pavlović, Vladimir B.

(Wiley, 2019)

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Vujančević, Jelena
AU  - Mašković, Pavle
AU  - Ćirković, Jovana
AU  - Papan, Jelena M.
AU  - Kosanović, Darko
AU  - Dramićanin, Miroslav
AU  - Petrović, Predrag B.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Titanium dioxide is a photocatalyst, known not only for its ability to oxidize organic contaminants, but also for its antimicrobial properties. In this article, significant enhancement of the antimicrobial activity of TiO2 (up to 32 times) was demonstrated after its activation by ball milling. The antimicrobial activity was analyzed for one fungal and 13 bacterial ATCC strains using the microdilution method and recording the minimum inhibitory concentration (MIC) values. In order to further investigate the correlation between the mechanical activation of TiO2 and its antimicrobial activity, the structure, morphology and phase composition of the material were studied by means of Electron Microscopy, X-ray diffraction and nitrogen adsorption-desorption measurements. UV-Vis diffuse reflectance spectra were recorded and the Kubelka-Munk function was applied to convert reflectance into the equivalent band gap energy (Eg) and, consequently, to investigate changes in the Eg value. X-ray photoelectron spectroscopy was used to analyze the influence of mechanical activation on the Ti 2p and O 1s spectra. The presented results are expected to enable the development of more sustainable and effective advanced TiO2-based materials with antimicrobial properties that could be used in numerous green technology applications.
PB  - Wiley
T2  - Journal of the American Ceramic Society
T1  - Structure and enhanced antimicrobial activity of mechanically activated nano TiO2
SP  - 7735
EP  - 7745
VL  - 102
IS  - 12
DO  - 10.1111/jace.16668
UR  - https://hdl.handle.net/21.15107/rcub_dais_6454
ER  - 
@article{
author = "Pavlović, Vera P. and Vujančević, Jelena and Mašković, Pavle and Ćirković, Jovana and Papan, Jelena M. and Kosanović, Darko and Dramićanin, Miroslav and Petrović, Predrag B. and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2019",
abstract = "Titanium dioxide is a photocatalyst, known not only for its ability to oxidize organic contaminants, but also for its antimicrobial properties. In this article, significant enhancement of the antimicrobial activity of TiO2 (up to 32 times) was demonstrated after its activation by ball milling. The antimicrobial activity was analyzed for one fungal and 13 bacterial ATCC strains using the microdilution method and recording the minimum inhibitory concentration (MIC) values. In order to further investigate the correlation between the mechanical activation of TiO2 and its antimicrobial activity, the structure, morphology and phase composition of the material were studied by means of Electron Microscopy, X-ray diffraction and nitrogen adsorption-desorption measurements. UV-Vis diffuse reflectance spectra were recorded and the Kubelka-Munk function was applied to convert reflectance into the equivalent band gap energy (Eg) and, consequently, to investigate changes in the Eg value. X-ray photoelectron spectroscopy was used to analyze the influence of mechanical activation on the Ti 2p and O 1s spectra. The presented results are expected to enable the development of more sustainable and effective advanced TiO2-based materials with antimicrobial properties that could be used in numerous green technology applications.",
publisher = "Wiley",
journal = "Journal of the American Ceramic Society",
title = "Structure and enhanced antimicrobial activity of mechanically activated nano TiO2",
pages = "7735-7745",
volume = "102",
number = "12",
doi = "10.1111/jace.16668",
url = "https://hdl.handle.net/21.15107/rcub_dais_6454"
}
Pavlović, V. P., Vujančević, J., Mašković, P., Ćirković, J., Papan, J. M., Kosanović, D., Dramićanin, M., Petrović, P. B., Vlahović, B.,& Pavlović, V. B. (2019). Structure and enhanced antimicrobial activity of mechanically activated nano TiO2.
Journal of the American Ceramic Society
Wiley., 102(12), 7735-7745.
https://doi.org/10.1111/jace.16668
Pavlović VP, Vujančević J, Mašković P, Ćirković J, Papan JM, Kosanović D, Dramićanin M, Petrović PB, Vlahović B, Pavlović VB. Structure and enhanced antimicrobial activity of mechanically activated nano TiO2. Journal of the American Ceramic Society. 2019;102(12):7735-7745.
doi:10.1111/jace.16668.
Pavlović Vera P., Vujančević Jelena, Mašković Pavle, Ćirković Jovana, Papan Jelena M., Kosanović Darko, Dramićanin Miroslav, Petrović Predrag B., Vlahović Branislav, Pavlović Vladimir B., "Structure and enhanced antimicrobial activity of mechanically activated nano TiO2" Journal of the American Ceramic Society, 102, no. 12 (2019):7735-7745,
https://doi.org/10.1111/jace.16668 .
7
2
2

Analysis of the initial-stage sintering of mechanically activated SrTiO3

Živojinović, Jelena; Pavlović, Vera P.; Labus, Nebojša; Blagojević, Vladimir A.; Kosanović, Darko; Pavlović, Vladimir B.

(ETRAN, 2019)

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Pavlović, Vera P.
AU  - Labus, Nebojša
AU  - Blagojević, Vladimir A.
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - The initial-stage of sintering plays a significant role in determining the final microstructure that defines the main characteristics of electroceramics materials such as functional properties. In this article non-isothermal sintering of non-activated and mechanically activated SrTiO3 samples was investigated up to 1300 °C. Dilatometric curves indicate that mechanical activation leads to an earlier onset of sintering, suggesting that it should lead to a more homogenous and denser sintered product. Analysis of the initial stage of sintering reveals that the sintering process of all examinated samples consists of two or three overlapping single-step processes, with a change in the dominant mass transport mechanism. The values of apparent activation energy of the considered single-step process exhibit a significant decrease with an increase in mechanical activation time. The values of the density of samples after isothermal sintering indicate that the final stage of sintering has not been reached by 1300 °C. © 2018 Authors.
PB  - ETRAN
T2  - Science of Sintering
T1  - Analysis of the initial-stage sintering of mechanically activated SrTiO3
SP  - 199
EP  - 208
VL  - 51
IS  - 2
DO  - 10.2298/SOS1902199Z
UR  - https://hdl.handle.net/21.15107/rcub_dais_6885
ER  - 
@article{
author = "Živojinović, Jelena and Pavlović, Vera P. and Labus, Nebojša and Blagojević, Vladimir A. and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2019",
abstract = "The initial-stage of sintering plays a significant role in determining the final microstructure that defines the main characteristics of electroceramics materials such as functional properties. In this article non-isothermal sintering of non-activated and mechanically activated SrTiO3 samples was investigated up to 1300 °C. Dilatometric curves indicate that mechanical activation leads to an earlier onset of sintering, suggesting that it should lead to a more homogenous and denser sintered product. Analysis of the initial stage of sintering reveals that the sintering process of all examinated samples consists of two or three overlapping single-step processes, with a change in the dominant mass transport mechanism. The values of apparent activation energy of the considered single-step process exhibit a significant decrease with an increase in mechanical activation time. The values of the density of samples after isothermal sintering indicate that the final stage of sintering has not been reached by 1300 °C. © 2018 Authors.",
publisher = "ETRAN",
journal = "Science of Sintering",
title = "Analysis of the initial-stage sintering of mechanically activated SrTiO3",
pages = "199-208",
volume = "51",
number = "2",
doi = "10.2298/SOS1902199Z",
url = "https://hdl.handle.net/21.15107/rcub_dais_6885"
}
Živojinović, J., Pavlović, V. P., Labus, N., Blagojević, V. A., Kosanović, D.,& Pavlović, V. B. (2019). Analysis of the initial-stage sintering of mechanically activated SrTiO3.
Science of Sintering
ETRAN., 51(2), 199-208.
https://doi.org/10.2298/SOS1902199Z
Živojinović J, Pavlović VP, Labus N, Blagojević VA, Kosanović D, Pavlović VB. Analysis of the initial-stage sintering of mechanically activated SrTiO3. Science of Sintering. 2019;51(2):199-208.
doi:10.2298/SOS1902199Z.
Živojinović Jelena, Pavlović Vera P., Labus Nebojša, Blagojević Vladimir A., Kosanović Darko, Pavlović Vladimir B., "Analysis of the initial-stage sintering of mechanically activated SrTiO3" Science of Sintering, 51, no. 2 (2019):199-208,
https://doi.org/10.2298/SOS1902199Z .
2
2

Morphological and structural characterization of spinel MgAl2O4

Filipović, Suzana; Obradović, Nina; Fahrenholtz, William G.; Marinković, Bojan A.; Rogan, Jelena; Lević, S.; Pavlović, Vladimir B.

(Belgrade : Serbian Ceramic Society, 2019)

TY  - CONF
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Fahrenholtz, William G.
AU  - Marinković, Bojan A.
AU  - Rogan, Jelena
AU  - Lević, S.
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Magnesium aluminate has spinel structure and very good mechanical, chemical, and thermal properties. Owing to these properties, it has a wide range of applications including refractory ceramics, optically transparent ceramic windows and armors. Its low dielectric permeability and low loss tangent enable its using for integrated electronic devices, as well. Furthermore, as a porous ceramic, magnesium aluminate has important application as humidity sensor, catalyst and filter for waste water purification. In this paper, synthesis and characterization of MgAl2O4 was performed. Stochiometric ratio of MgO and Al2O3powders was mixed and calcined within the temperatures range 1500-1800 oC to produce pure spinel phase. Thereafter pellets were crushed and treated in planetary ball mill for 60 minutes to obtained fine grain. All powders, calcined and milled, were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature denser samples but more fragile have been synthesized. Milling for 1 hour leads to crumble of bigger particles and getting finer, single phase powders. XRPD and Raman spectroscopy showed disorder in crystal structure after milling.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
T1  - Morphological and structural characterization of spinel MgAl2O4
SP  - 32
EP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_dais_6779
ER  - 
@conference{
author = "Filipović, Suzana and Obradović, Nina and Fahrenholtz, William G. and Marinković, Bojan A. and Rogan, Jelena and Lević, S. and Pavlović, Vladimir B.",
year = "2019",
abstract = "Magnesium aluminate has spinel structure and very good mechanical, chemical, and thermal properties. Owing to these properties, it has a wide range of applications including refractory ceramics, optically transparent ceramic windows and armors. Its low dielectric permeability and low loss tangent enable its using for integrated electronic devices, as well. Furthermore, as a porous ceramic, magnesium aluminate has important application as humidity sensor, catalyst and filter for waste water purification. In this paper, synthesis and characterization of MgAl2O4 was performed. Stochiometric ratio of MgO and Al2O3powders was mixed and calcined within the temperatures range 1500-1800 oC to produce pure spinel phase. Thereafter pellets were crushed and treated in planetary ball mill for 60 minutes to obtained fine grain. All powders, calcined and milled, were examined for phase composition, crystal structure, and morphology. The obtained results showed that by increasing the temperature denser samples but more fragile have been synthesized. Milling for 1 hour leads to crumble of bigger particles and getting finer, single phase powders. XRPD and Raman spectroscopy showed disorder in crystal structure after milling.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019",
title = "Morphological and structural characterization of spinel MgAl2O4",
pages = "32-32",
url = "https://hdl.handle.net/21.15107/rcub_dais_6779"
}
Filipović, S., Obradović, N., Fahrenholtz, W. G., Marinković, B. A., Rogan, J., Lević, S.,& Pavlović, V. B. (2019). Morphological and structural characterization of spinel MgAl2O4.
Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019
Belgrade : Serbian Ceramic Society., 32-32.
Filipović S, Obradović N, Fahrenholtz WG, Marinković BA, Rogan J, Lević S, Pavlović VB. Morphological and structural characterization of spinel MgAl2O4. Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019. 2019;:32-32.
Filipović Suzana, Obradović Nina, Fahrenholtz William G., Marinković Bojan A., Rogan Jelena, Lević S., Pavlović Vladimir B., "Morphological and structural characterization of spinel MgAl2O4" Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VIII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 23-25. September 2019 (2019):32-32