Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM)

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Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (en)
Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije, Ugovor br. 451-03-68/2020-14/200026 (Univerzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju - IHTM) (sr_RS)
Министарство просвете, науке и технолошког развоја Републике Србије, Уговор бр. 451-03-68/2020-14/200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (sr)
Authors

Publications

The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods

Šuljagić, Marija; Vulić, Predrag; Jeremić, Dejan; Pavlović, Vladimir B.; Filipović, Suzana; Kilanski, Lukasz; Lewinska, Sabina; Slawska-Waniewska, Anna; Milenković, Milica; Nikolić, Aleksandar S.; Anđelković, Ljubica

(Elsevier, 2021)

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Vulić, Predrag
AU  - Jeremić, Dejan
AU  - Pavlović, Vladimir B.
AU  - Filipović, Suzana
AU  - Kilanski, Lukasz
AU  - Lewinska, Sabina
AU  - Slawska-Waniewska, Anna
AU  - Milenković, Milica
AU  - Nikolić, Aleksandar S.
AU  - Anđelković, Ljubica
PY  - 2021
AB  - To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.
PB  - Elsevier
T2  - Materials Research Bulletin
T1  - The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods
SP  - 111117
VL  - 134
DO  - 10.1016/j.materresbull.2020.111117
UR  - https://hdl.handle.net/21.15107/rcub_dais_9514
ER  - 
@article{
author = "Šuljagić, Marija and Vulić, Predrag and Jeremić, Dejan and Pavlović, Vladimir B. and Filipović, Suzana and Kilanski, Lukasz and Lewinska, Sabina and Slawska-Waniewska, Anna and Milenković, Milica and Nikolić, Aleksandar S. and Anđelković, Ljubica",
year = "2021",
abstract = "To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.",
publisher = "Elsevier",
journal = "Materials Research Bulletin",
title = "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods",
pages = "111117",
volume = "134",
doi = "10.1016/j.materresbull.2020.111117",
url = "https://hdl.handle.net/21.15107/rcub_dais_9514"
}
Šuljagić, M., Vulić, P., Jeremić, D., Pavlović, V. B., Filipović, S., Kilanski, L., Lewinska, S., Slawska-Waniewska, A., Milenković, M., Nikolić, A. S.,& Anđelković, L. (2021). The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods.
Materials Research Bulletin
Elsevier., 134, 111117.
https://doi.org/10.1016/j.materresbull.2020.111117
Šuljagić M, Vulić P, Jeremić D, Pavlović VB, Filipović S, Kilanski L, Lewinska S, Slawska-Waniewska A, Milenković M, Nikolić AS, Anđelković L. The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. Materials Research Bulletin. 2021;134:111117.
doi:10.1016/j.materresbull.2020.111117.
Šuljagić Marija, Vulić Predrag, Jeremić Dejan, Pavlović Vladimir B., Filipović Suzana, Kilanski Lukasz, Lewinska Sabina, Slawska-Waniewska Anna, Milenković Milica, Nikolić Aleksandar S., Anđelković Ljubica, "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods" Materials Research Bulletin, 134 (2021):111117,
https://doi.org/10.1016/j.materresbull.2020.111117 .
2
1
1

The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods

Šuljagić, Marija; Vulić, Predrag; Jeremić, Dejan; Pavlović, Vladimir B.; Filipović, Suzana; Kilanski, Lukasz; Lewinska, Sabina; Slawska-Waniewska, Anna; Milenković, Milica; Nikolić, Aleksandar S.; Anđelković, Ljubica

(Elsevier, 2021)

TY  - JOUR
AU  - Šuljagić, Marija
AU  - Vulić, Predrag
AU  - Jeremić, Dejan
AU  - Pavlović, Vladimir B.
AU  - Filipović, Suzana
AU  - Kilanski, Lukasz
AU  - Lewinska, Sabina
AU  - Slawska-Waniewska, Anna
AU  - Milenković, Milica
AU  - Nikolić, Aleksandar S.
AU  - Anđelković, Ljubica
PY  - 2021
AB  - To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.
PB  - Elsevier
T2  - Materials Research Bulletin
T1  - The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods
SP  - 111117
VL  - 134
DO  - 10.1016/j.materresbull.2020.111117
UR  - https://hdl.handle.net/21.15107/rcub_dais_9515
ER  - 
@article{
author = "Šuljagić, Marija and Vulić, Predrag and Jeremić, Dejan and Pavlović, Vladimir B. and Filipović, Suzana and Kilanski, Lukasz and Lewinska, Sabina and Slawska-Waniewska, Anna and Milenković, Milica and Nikolić, Aleksandar S. and Anđelković, Ljubica",
year = "2021",
abstract = "To investigate the magnetic behavior of starch-coated cobalt ferrites, well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses were chosen for their preparation. The obtained materials had pure single-phase spinel structures. Scanning and transmission electron microscopy analyses revealed that the morphology of the samples is not uniform, and particle aggregation is a dominant process. Fourier transform infrared spectra and thermogravimetric analysis confirmed the presence of starch in all–coated samples. The unusually higher saturation magnetization of starch-coated samples than their as-prepared analogs, obtained by coprecipitation, ultrasonically assisted coprecipitation, and microwave-assisted hydrothermal methods, might be explained by the Ostwald ripening mechanism induced by the coating process. A decrease in magnetization was noticed for the starch-functionalized nanomaterials synthesized by mechanochemical and microemulsion methods, in comparison to their as-prepared analogs, i.e., the size distribution of such nanoparticles is narrow, and the average diameter of the grains is near critical for the Ostwald ripening process.",
publisher = "Elsevier",
journal = "Materials Research Bulletin",
title = "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods",
pages = "111117",
volume = "134",
doi = "10.1016/j.materresbull.2020.111117",
url = "https://hdl.handle.net/21.15107/rcub_dais_9515"
}
Šuljagić, M., Vulić, P., Jeremić, D., Pavlović, V. B., Filipović, S., Kilanski, L., Lewinska, S., Slawska-Waniewska, A., Milenković, M., Nikolić, A. S.,& Anđelković, L. (2021). The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods.
Materials Research Bulletin
Elsevier., 134, 111117.
https://doi.org/10.1016/j.materresbull.2020.111117
Šuljagić M, Vulić P, Jeremić D, Pavlović VB, Filipović S, Kilanski L, Lewinska S, Slawska-Waniewska A, Milenković M, Nikolić AS, Anđelković L. The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods. Materials Research Bulletin. 2021;134:111117.
doi:10.1016/j.materresbull.2020.111117.
Šuljagić Marija, Vulić Predrag, Jeremić Dejan, Pavlović Vladimir B., Filipović Suzana, Kilanski Lukasz, Lewinska Sabina, Slawska-Waniewska Anna, Milenković Milica, Nikolić Aleksandar S., Anđelković Ljubica, "The influence of the starch coating on the magnetic properties of nanosized cobalt ferrites obtained by different synthetic methods" Materials Research Bulletin, 134 (2021):111117,
https://doi.org/10.1016/j.materresbull.2020.111117 .
2
1
1

Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction

Filipović, Suzana; Obradović, Nina; Anđelković, Ljubica; Olćan, Dragan; Petrović, Jovana; Mirković, Miljana; Pavlović, Vladimir B.; Jeremić, Dejan; Vlahović, Branislav; Đorđević, Antonije

(Belgrade : International Institute for the Science of Sintering, 2021)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Anđelković, Ljubica
AU  - Olćan, Dragan
AU  - Petrović, Jovana
AU  - Mirković, Miljana
AU  - Pavlović, Vladimir B.
AU  - Jeremić, Dejan
AU  - Vlahović, Branislav
AU  - Đorđević, Antonije
PY  - 2021
AB  - Solid-state reaction between BaTiO3 and Fe2O3 was used to produce a multiferroic heterostructure composite. Commercial BaTiO3 and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300 oC for 6 h. Sintering at 1300 oC for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19 and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3 phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3 with Fe2O3 resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction
SP  - 1
EP  - 8
VL  - 53
DO  - 10.2298/SOS2101001F
UR  - https://hdl.handle.net/21.15107/rcub_dais_11230
ER  - 
@article{
author = "Filipović, Suzana and Obradović, Nina and Anđelković, Ljubica and Olćan, Dragan and Petrović, Jovana and Mirković, Miljana and Pavlović, Vladimir B. and Jeremić, Dejan and Vlahović, Branislav and Đorđević, Antonije",
year = "2021",
abstract = "Solid-state reaction between BaTiO3 and Fe2O3 was used to produce a multiferroic heterostructure composite. Commercial BaTiO3 and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300 oC for 6 h. Sintering at 1300 oC for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19 and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3 phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3 with Fe2O3 resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction",
pages = "1-8",
volume = "53",
doi = "10.2298/SOS2101001F",
url = "https://hdl.handle.net/21.15107/rcub_dais_11230"
}
Filipović, S., Obradović, N., Anđelković, L., Olćan, D., Petrović, J., Mirković, M., Pavlović, V. B., Jeremić, D., Vlahović, B.,& Đorđević, A. (2021). Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction.
Science of Sintering
Belgrade : International Institute for the Science of Sintering., 53, 1-8.
https://doi.org/10.2298/SOS2101001F
Filipović S, Obradović N, Anđelković L, Olćan D, Petrović J, Mirković M, Pavlović VB, Jeremić D, Vlahović B, Đorđević A. Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction. Science of Sintering. 2021;53:1-8.
doi:10.2298/SOS2101001F.
Filipović Suzana, Obradović Nina, Anđelković Ljubica, Olćan Dragan, Petrović Jovana, Mirković Miljana, Pavlović Vladimir B., Jeremić Dejan, Vlahović Branislav, Đorđević Antonije, "Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction" Science of Sintering, 53 (2021):1-8,
https://doi.org/10.2298/SOS2101001F .

Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors

Jokić, Ivana; Đurić, Zoran G.; Radulović, Katarina; Frantlović, Miloš; Milovanović, Gradimir V.; Krstajić, Predrag M.

(Basel : MDPI AG, 2021)

TY  - JOUR
AU  - Jokić, Ivana
AU  - Đurić, Zoran G.
AU  - Radulović, Katarina
AU  - Frantlović, Miloš
AU  - Milovanović, Gradimir V.
AU  - Krstajić, Predrag M.
PY  - 2021
AB  - In order to improve the interpretation of measurement results and to achieve the optimal performance of microfluidic biosensors, advanced mathematical models of their time response and noise are needed. The random nature of adsorption–desorption and mass transfer (MT) processes that generate the sensor response makes the sensor output signal inherently stochastic and necessitates the use of a stochastic approach in sensor response analysis. We present a stochastic model of the sensor time response, which takes into account the coupling of adsorption–desorption and MT processes. It is used for the analysis of response kinetics and ultimate noise performance of protein biosensors. We show that slow MT not only decelerates the response kinetics, but also increases the noise and decreases the sensor’s maximal achievable signal-to-noise ratio, thus degrading the ultimate sensor performance, including the minimal detectable/quantifiable analyte concentration. The results illustrate the significance of the presented model for the correct interpretation of measurement data, for the estimation of sensors’ noise performance metrics important for reliable analyte detection/quantification, as well as for sensor optimization in terms of the lower detection/quantification limit. They are also incentives for the further investigation of the MT influence in nanoscale sensors, as a possible cause of false-negative results in analyte detection experiments.
PB  - Basel : MDPI AG
T2  - Biosensors
T1  - Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors
SP  - 194
VL  - 11
IS  - 6
DO  - 10.3390/bios11060194
UR  - https://hdl.handle.net/21.15107/rcub_dais_11638
ER  - 
@article{
author = "Jokić, Ivana and Đurić, Zoran G. and Radulović, Katarina and Frantlović, Miloš and Milovanović, Gradimir V. and Krstajić, Predrag M.",
year = "2021",
abstract = "In order to improve the interpretation of measurement results and to achieve the optimal performance of microfluidic biosensors, advanced mathematical models of their time response and noise are needed. The random nature of adsorption–desorption and mass transfer (MT) processes that generate the sensor response makes the sensor output signal inherently stochastic and necessitates the use of a stochastic approach in sensor response analysis. We present a stochastic model of the sensor time response, which takes into account the coupling of adsorption–desorption and MT processes. It is used for the analysis of response kinetics and ultimate noise performance of protein biosensors. We show that slow MT not only decelerates the response kinetics, but also increases the noise and decreases the sensor’s maximal achievable signal-to-noise ratio, thus degrading the ultimate sensor performance, including the minimal detectable/quantifiable analyte concentration. The results illustrate the significance of the presented model for the correct interpretation of measurement data, for the estimation of sensors’ noise performance metrics important for reliable analyte detection/quantification, as well as for sensor optimization in terms of the lower detection/quantification limit. They are also incentives for the further investigation of the MT influence in nanoscale sensors, as a possible cause of false-negative results in analyte detection experiments.",
publisher = "Basel : MDPI AG",
journal = "Biosensors",
title = "Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors",
pages = "194",
volume = "11",
number = "6",
doi = "10.3390/bios11060194",
url = "https://hdl.handle.net/21.15107/rcub_dais_11638"
}
Jokić, I., Đurić, Z. G., Radulović, K., Frantlović, M., Milovanović, G. V.,& Krstajić, P. M. (2021). Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors.
Biosensors
Basel : MDPI AG., 11(6), 194.
https://doi.org/10.3390/bios11060194
Jokić I, Đurić ZG, Radulović K, Frantlović M, Milovanović GV, Krstajić PM. Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors. Biosensors. 2021;11(6):194.
doi:10.3390/bios11060194.
Jokić Ivana, Đurić Zoran G., Radulović Katarina, Frantlović Miloš, Milovanović Gradimir V., Krstajić Predrag M., "Stochastic Time Response and Ultimate Noise Performance of Adsorption-Based Microfluidic Biosensors" Biosensors, 11, no. 6 (2021):194,
https://doi.org/10.3390/bios11060194 .

Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja

Mihailović, Marija; Jegdić, Bore; Jugović, Branimir; Kovačina, Jovanka; Radojković, Bojana; Patarić, Aleksandra; Jokić, Bojan

(Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy, 2021)

TY  - BOOK
AU  - Mihailović, Marija
AU  - Jegdić, Bore
AU  - Jugović, Branimir
AU  - Kovačina, Jovanka
AU  - Radojković, Bojana
AU  - Patarić, Aleksandra
AU  - Jokić, Bojan
PY  - 2021
AB  - Praćenje pojave i brzine korozije, nastanak termičkih oksida na površini metalnih delova eletroenergetskog postrojenјa, kao i način njihovog otklanjanja na način koji je tehnološki pogodan, ekonomski pristupačan i ekološki opravdan prikazan je u ovom tehničkom rešenju Ispitivanjem je ustanovljeno da su metalni delovi na kojima se javlja korozija izrađeni od na nerđajućeg čelika AISI 304, pa je pojava korozije i termičkih oksida praćena je u odnosu na to, kao i sastav prašine sa kojom su metalni delovi u kontaktu. Pojava termičkih oksida na površini nerđajućih čelika posledica je povišene temperature na mestu zavarivanja metalnih delova.
Merena je vrednost pH oba rastvora: etalonskog i zasićenog rastvoru prašine iz pogona.
Sastav uzoraka prašine određen je FTIR metodom, pa su na osnovu prisutnih jona u rastvoru definisana ostala ispitivanja.
Određivan je korozioni potencijal Ekor, vrednost otpora polarizacije Rp, kao i gustina struje korozije jkor. Sva ispitivanja nerđajućeg čelika u etalonskom rastvoru i u zasićenom rastvoru prašine iz pogona firme naručioca, rađena su za 1 sat i u toku 25 dana.
Kao rezultat svih istražoivanja, date su tehnološke preporuke i način otklanjanja korozije i termičkih oksida.
Rešenje je prodato naručuicu u toku 2020.godine, a od januara 2021.godine primenjeno u postrojenju naručioca, ELNOS BL d.o.o., koji su izjavom potvrdili primenu ovog tehničkog rešenja u svom poslovanju.
AB  - Monitoring the occurrence and rate of corrosion, the formation of thermal oxides on the surface of metal parts of the power plant, as well as the method of their elimination in a way that is technologically suitable, economically affordable and environmentally justified is shown in this technical solution. It has been established that the metal elements affected by corrosion were made from stainless steel AISI 304. Accordingly, the occurrence of corrosion and thermal oxides was monitored based on the material and the composition of the dust with which the metal parts are in contact. The emergence of thermal oxides on the surface of stainless steels is a consequence of the elevated temperature at the welding site.
The pH value of both solutions was measured: standard and saturated solution of dust from the plant. The composition of the dust samples was determined by FTIR. The other tests were defined based on the ions present in the solution.
The corrosion potential, the value of the polarization resistance, as well as the corrosion current density were determined. All tests of stainless steel in the standard solution and in the saturated solution of dust were performed for one hour within a span of 25 days.
Technological recommendations on how to eliminate corrosion and thermal oxides are provided.
The solution has been applied since January 2021 by ELNOS BL d.o.o.
PB  - Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy
T1  - Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja
T1  - Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant
UR  - https://hdl.handle.net/21.15107/rcub_dais_11630
ER  - 
@book{
author = "Mihailović, Marija and Jegdić, Bore and Jugović, Branimir and Kovačina, Jovanka and Radojković, Bojana and Patarić, Aleksandra and Jokić, Bojan",
year = "2021",
abstract = "Praćenje pojave i brzine korozije, nastanak termičkih oksida na površini metalnih delova eletroenergetskog postrojenјa, kao i način njihovog otklanjanja na način koji je tehnološki pogodan, ekonomski pristupačan i ekološki opravdan prikazan je u ovom tehničkom rešenju Ispitivanjem je ustanovljeno da su metalni delovi na kojima se javlja korozija izrađeni od na nerđajućeg čelika AISI 304, pa je pojava korozije i termičkih oksida praćena je u odnosu na to, kao i sastav prašine sa kojom su metalni delovi u kontaktu. Pojava termičkih oksida na površini nerđajućih čelika posledica je povišene temperature na mestu zavarivanja metalnih delova.
Merena je vrednost pH oba rastvora: etalonskog i zasićenog rastvoru prašine iz pogona.
Sastav uzoraka prašine određen je FTIR metodom, pa su na osnovu prisutnih jona u rastvoru definisana ostala ispitivanja.
Određivan je korozioni potencijal Ekor, vrednost otpora polarizacije Rp, kao i gustina struje korozije jkor. Sva ispitivanja nerđajućeg čelika u etalonskom rastvoru i u zasićenom rastvoru prašine iz pogona firme naručioca, rađena su za 1 sat i u toku 25 dana.
Kao rezultat svih istražoivanja, date su tehnološke preporuke i način otklanjanja korozije i termičkih oksida.
Rešenje je prodato naručuicu u toku 2020.godine, a od januara 2021.godine primenjeno u postrojenju naručioca, ELNOS BL d.o.o., koji su izjavom potvrdili primenu ovog tehničkog rešenja u svom poslovanju., Monitoring the occurrence and rate of corrosion, the formation of thermal oxides on the surface of metal parts of the power plant, as well as the method of their elimination in a way that is technologically suitable, economically affordable and environmentally justified is shown in this technical solution. It has been established that the metal elements affected by corrosion were made from stainless steel AISI 304. Accordingly, the occurrence of corrosion and thermal oxides was monitored based on the material and the composition of the dust with which the metal parts are in contact. The emergence of thermal oxides on the surface of stainless steels is a consequence of the elevated temperature at the welding site.
The pH value of both solutions was measured: standard and saturated solution of dust from the plant. The composition of the dust samples was determined by FTIR. The other tests were defined based on the ions present in the solution.
The corrosion potential, the value of the polarization resistance, as well as the corrosion current density were determined. All tests of stainless steel in the standard solution and in the saturated solution of dust were performed for one hour within a span of 25 days.
Technological recommendations on how to eliminate corrosion and thermal oxides are provided.
The solution has been applied since January 2021 by ELNOS BL d.o.o.",
publisher = "Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy",
title = "Ispitivanje i otklanјanјe pojave korozije i termičkih oksida na metalnim delovima elektroenergetskog postojenja, Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant",
url = "https://hdl.handle.net/21.15107/rcub_dais_11630"
}
Mihailović, M., Jegdić, B., Jugović, B., Kovačina, J., Radojković, B., Patarić, A.,& Jokić, B. (2021). Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant.

Belgrade : University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
Mihailović M, Jegdić B, Jugović B, Kovačina J, Radojković B, Patarić A, Jokić B. Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant. 2021;.
Mihailović Marija, Jegdić Bore, Jugović Branimir, Kovačina Jovanka, Radojković Bojana, Patarić Aleksandra, Jokić Bojan, "Possibility of removal of corrosion and thermal oxides on metal parts of electric power plant" (2021)

The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries

Rakočević, Lazar; Štrbac, Svetlana; Potočnik, Jelena; Popović, Maja; Jugović, Dragana; Stojković Šimatović, Ivana

(Elsevier, 2021)

TY  - JOUR
AU  - Rakočević, Lazar
AU  - Štrbac, Svetlana
AU  - Potočnik, Jelena
AU  - Popović, Maja
AU  - Jugović, Dragana
AU  - Stojković Šimatović, Ivana
PY  - 2021
AB  - Cathodic material for sodium-ion rechargeable batteries based on NaxMnO2 were synthesized by glycine nitrate method and subsequent annealing at high temperatures. Different crystal structures with different morphologies were obtained depending on the annealing temperature: hexagonal layeredα-Na0.7MnO2.05 nanoplates were obtained at 850 ◦C, while 3-D tunnel structured Na0⋅4MnO2 and Na0⋅44MnO2, both with rod-like morphology, were obtained at 800 ◦C and 900 ◦C, respectively. The investigations of the electrochemical behavior of obtained cathodic materials in aqueous NaNO3 solution have shown that Na0⋅44MnO2 obtained at 900 ◦C has shown the best battery performance. Its initial discharge capacities are 123.5 mA h/g, 113.2 mA h/g, and 102.0 mA h/g at the high current densities of 1000, 2000 and 5000 mA/g, respectively.
PB  - Elsevier
T2  - Ceramics International
T1  - The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries
SP  - 4595
EP  - 4603
VL  - 47
IS  - 4
DO  - 10.1016/j.ceramint.2020.10.025
UR  - https://hdl.handle.net/21.15107/rcub_dais_11229
ER  - 
@article{
author = "Rakočević, Lazar and Štrbac, Svetlana and Potočnik, Jelena and Popović, Maja and Jugović, Dragana and Stojković Šimatović, Ivana",
year = "2021",
abstract = "Cathodic material for sodium-ion rechargeable batteries based on NaxMnO2 were synthesized by glycine nitrate method and subsequent annealing at high temperatures. Different crystal structures with different morphologies were obtained depending on the annealing temperature: hexagonal layeredα-Na0.7MnO2.05 nanoplates were obtained at 850 ◦C, while 3-D tunnel structured Na0⋅4MnO2 and Na0⋅44MnO2, both with rod-like morphology, were obtained at 800 ◦C and 900 ◦C, respectively. The investigations of the electrochemical behavior of obtained cathodic materials in aqueous NaNO3 solution have shown that Na0⋅44MnO2 obtained at 900 ◦C has shown the best battery performance. Its initial discharge capacities are 123.5 mA h/g, 113.2 mA h/g, and 102.0 mA h/g at the high current densities of 1000, 2000 and 5000 mA/g, respectively.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries",
pages = "4595-4603",
volume = "47",
number = "4",
doi = "10.1016/j.ceramint.2020.10.025",
url = "https://hdl.handle.net/21.15107/rcub_dais_11229"
}
Rakočević, L., Štrbac, S., Potočnik, J., Popović, M., Jugović, D.,& Stojković Šimatović, I. (2021). The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries.
Ceramics International
Elsevier., 47(4), 4595-4603.
https://doi.org/10.1016/j.ceramint.2020.10.025
Rakočević L, Štrbac S, Potočnik J, Popović M, Jugović D, Stojković Šimatović I. The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries. Ceramics International. 2021;47(4):4595-4603.
doi:10.1016/j.ceramint.2020.10.025.
Rakočević Lazar, Štrbac Svetlana, Potočnik Jelena, Popović Maja, Jugović Dragana, Stojković Šimatović Ivana, "The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries" Ceramics International, 47, no. 4 (2021):4595-4603,
https://doi.org/10.1016/j.ceramint.2020.10.025 .

The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries

Rakočević, Lazar; Štrbac, Svetlana; Potočnik, Jelena; Popović, Maja; Jugović, Dragana; Stojković Simatović, Ivana

(Elsevier BV, 2021)

TY  - JOUR
AU  - Rakočević, Lazar
AU  - Štrbac, Svetlana
AU  - Potočnik, Jelena
AU  - Popović, Maja
AU  - Jugović, Dragana
AU  - Stojković Simatović, Ivana
PY  - 2021
AB  - Cathodic material for sodium-ion rechargeable batteries based on NaxMnO2 were synthesized by glycine nitrate method and subsequent annealing at high temperatures. Different crystal structures with different morphologies were obtained depending on the annealing temperature: hexagonal layeredα-Na0.7MnO2.05 nanoplates were obtained at 850 °C, while 3-D tunnel structured Na0·4MnO2 and Na0·44MnO2, both with rod-like morphology, were obtained at 800 °C and 900 °C, respectively. The investigations of the electrochemical behavior of obtained cathodic materials in aqueous NaNO3 solution have shown that Na0·44MnO2 obtained at 900 °C has shown the best battery performance. Its initial discharge capacities are 123.5 mA h/g, 113.2 mA h/g, and 102.0 mA h/g at the high current densities of 1000, 2000 and 5000 mA/g, respectively.
PB  - Elsevier BV
T2  - Ceramics International
T1  - The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries
SP  - 4595
EP  - 4603
VL  - 47
IS  - 4
DO  - 10.1016/j.ceramint.2020.10.025
UR  - https://hdl.handle.net/21.15107/rcub_dais_10035
ER  - 
@article{
author = "Rakočević, Lazar and Štrbac, Svetlana and Potočnik, Jelena and Popović, Maja and Jugović, Dragana and Stojković Simatović, Ivana",
year = "2021",
abstract = "Cathodic material for sodium-ion rechargeable batteries based on NaxMnO2 were synthesized by glycine nitrate method and subsequent annealing at high temperatures. Different crystal structures with different morphologies were obtained depending on the annealing temperature: hexagonal layeredα-Na0.7MnO2.05 nanoplates were obtained at 850 °C, while 3-D tunnel structured Na0·4MnO2 and Na0·44MnO2, both with rod-like morphology, were obtained at 800 °C and 900 °C, respectively. The investigations of the electrochemical behavior of obtained cathodic materials in aqueous NaNO3 solution have shown that Na0·44MnO2 obtained at 900 °C has shown the best battery performance. Its initial discharge capacities are 123.5 mA h/g, 113.2 mA h/g, and 102.0 mA h/g at the high current densities of 1000, 2000 and 5000 mA/g, respectively.",
publisher = "Elsevier BV",
journal = "Ceramics International",
title = "The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries",
pages = "4595-4603",
volume = "47",
number = "4",
doi = "10.1016/j.ceramint.2020.10.025",
url = "https://hdl.handle.net/21.15107/rcub_dais_10035"
}
Rakočević, L., Štrbac, S., Potočnik, J., Popović, M., Jugović, D.,& Stojković Simatović, I. (2021). The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries.
Ceramics International
Elsevier BV., 47(4), 4595-4603.
https://doi.org/10.1016/j.ceramint.2020.10.025
Rakočević L, Štrbac S, Potočnik J, Popović M, Jugović D, Stojković Simatović I. The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries. Ceramics International. 2021;47(4):4595-4603.
doi:10.1016/j.ceramint.2020.10.025.
Rakočević Lazar, Štrbac Svetlana, Potočnik Jelena, Popović Maja, Jugović Dragana, Stojković Simatović Ivana, "The NaxMnO2 materials prepared by a glycine-nitrate method as advanced cathode materials for aqueous sodium-ion rechargeable batteries" Ceramics International, 47, no. 4 (2021):4595-4603,
https://doi.org/10.1016/j.ceramint.2020.10.025 .

Solvent effects on structural changes in self-healing epoxy composites

Radović, Ivana; Stajčić, Aleksandar; Radisavljević, Andjela; Veljković, Filip; Čebela, Maria; Mitić, Vojislav V.; Radojević, Vesna

(Elsevier, 2020)

TY  - JOUR
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Radisavljević, Andjela
AU  - Veljković, Filip
AU  - Čebela, Maria
AU  - Mitić, Vojislav V.
AU  - Radojević, Vesna
PY  - 2020
AB  - Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/ healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - Solvent effects on structural changes in self-healing epoxy composites
SP  - 123761
VL  - 256
DO  - 10.1016/j.matchemphys.2020.123761
UR  - https://hdl.handle.net/21.15107/rcub_dais_9539
ER  - 
@article{
author = "Radović, Ivana and Stajčić, Aleksandar and Radisavljević, Andjela and Veljković, Filip and Čebela, Maria and Mitić, Vojislav V. and Radojević, Vesna",
year = "2020",
abstract = "Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/ healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "Solvent effects on structural changes in self-healing epoxy composites",
pages = "123761",
volume = "256",
doi = "10.1016/j.matchemphys.2020.123761",
url = "https://hdl.handle.net/21.15107/rcub_dais_9539"
}
Radović, I., Stajčić, A., Radisavljević, A., Veljković, F., Čebela, M., Mitić, V. V.,& Radojević, V. (2020). Solvent effects on structural changes in self-healing epoxy composites.
Materials Chemistry and Physics
Elsevier., 256, 123761.
https://doi.org/10.1016/j.matchemphys.2020.123761
Radović I, Stajčić A, Radisavljević A, Veljković F, Čebela M, Mitić VV, Radojević V. Solvent effects on structural changes in self-healing epoxy composites. Materials Chemistry and Physics. 2020;256:123761.
doi:10.1016/j.matchemphys.2020.123761.
Radović Ivana, Stajčić Aleksandar, Radisavljević Andjela, Veljković Filip, Čebela Maria, Mitić Vojislav V., Radojević Vesna, "Solvent effects on structural changes in self-healing epoxy composites" Materials Chemistry and Physics, 256 (2020):123761,
https://doi.org/10.1016/j.matchemphys.2020.123761 .
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