Pavlović, Vladimir B.

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Authority KeyName Variants
orcid::0000-0002-1138-0331
  • Pavlović, Vladimir B. (275)
  • Pavlović, Vladimir (1)
Projects
Directed synthesis, structure and properties of multifunctional materials Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200175 (Institute of Technical Sciences of SASA, Belgrade)
United States National Aeronautics and Space Administration (NASA), Grant NNX09AV07A United States National Science Foundation (NSF) / Centers of Research Excellence in Science and Technology (CREST), Grant HRD-0833184
Investigation of the relation in triad: Synthesis structure-properties for functional materials Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200116 (University of Belgrade, Faculty of Agriculture)
United States National Science Foundation (NSF) / Partnerships for Research and Education in Materials (PREM), Grant 1523617 Development and application of multifunctional materials using domestic raw materials in upgraded processing lines
Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing
Lithium-ion batteries and fuel cells - research and development Synthesis, processing and applications of nanostructured multifunctional materials with defined properties
Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200135 (University of Belgrade, Faculty of Technology and Metallurgy) Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them
Functional, Functionalized and Advanced Nanomaterials Ministry of Education, Youth and Sports (MEYS) of Czech Republic - CEITEC 2020 [LQ1601]
Serbian Academy of Sciences and Arts, Project F-198 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)
Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion Bilateral cooperation between Serbia and France, No. 4510339/2016/09/03 “Inteligent econanomaterials and nanocomposites”
Grant Agency of the Czech Republic, Project 15-06390S Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200168 (University of Belgrade, Faculty of Chemistry)
National Science Foundation, North Carolina State University, Project No. HRD-1345219 Czech Science Foundation (GACR) - 17-05620S
Investigation of intermetallics and semiconductors and possible application in renewable energy sources Investigation of the effect of parameters of synthesis and processing on dielectric, optical and magnetic properties, both bulk and surface of crystal and polymeric systems
Geologic and ecotoxicologic research in identification of geopathogen zones of toxic elements in drinking water reservoirs- research into methods and procedures for reduction of biochemical anomalies Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200053 (University of Belgrade, Institute for Multidisciplinary Research)

Author's Bibliography

Nanomechanical properties of PVDF–ZnO polymer nanocomposite

Peleš Tadić, Adriana; Blagojević, Vladimir A.; Stojanović, Dušica; Ostojić, Sanja B.; Tasić, Nikola; Kosanović, Darko; Uskoković, Petar; Pavlović, Vladimir B.

(Elsevier BV, 2023)

TY  - JOUR
AU  - Peleš Tadić, Adriana
AU  - Blagojević, Vladimir A.
AU  - Stojanović, Dušica
AU  - Ostojić, Sanja B.
AU  - Tasić, Nikola
AU  - Kosanović, Darko
AU  - Uskoković, Petar
AU  - Pavlović, Vladimir B.
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/13560
AB  - Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF.
PB  - Elsevier BV
T2  - Materials Science and Engineering: B
T1  - Nanomechanical properties of PVDF–ZnO polymer nanocomposite
SP  - 116126
VL  - 287
DO  - 10.1016/j.mseb.2022.116126
UR  - https://hdl.handle.net/21.15107/rcub_dais_13436
ER  - 
@article{
author = "Peleš Tadić, Adriana and Blagojević, Vladimir A. and Stojanović, Dušica and Ostojić, Sanja B. and Tasić, Nikola and Kosanović, Darko and Uskoković, Petar and Pavlović, Vladimir B.",
year = "2023",
abstract = "Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF.",
publisher = "Elsevier BV",
journal = "Materials Science and Engineering: B",
title = "Nanomechanical properties of PVDF–ZnO polymer nanocomposite",
pages = "116126",
volume = "287",
doi = "10.1016/j.mseb.2022.116126",
url = "https://hdl.handle.net/21.15107/rcub_dais_13436"
}
Peleš Tadić, A., Blagojević, V. A., Stojanović, D., Ostojić, S. B., Tasić, N., Kosanović, D., Uskoković, P.,& Pavlović, V. B.. (2023). Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering: B
Elsevier BV., 287, 116126.
https://doi.org/10.1016/j.mseb.2022.116126
https://hdl.handle.net/21.15107/rcub_dais_13436
Peleš Tadić A, Blagojević VA, Stojanović D, Ostojić SB, Tasić N, Kosanović D, Uskoković P, Pavlović VB. Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering: B. 2023;287:116126.
doi:10.1016/j.mseb.2022.116126
https://hdl.handle.net/21.15107/rcub_dais_13436 .
Peleš Tadić, Adriana, Blagojević, Vladimir A., Stojanović, Dušica, Ostojić, Sanja B., Tasić, Nikola, Kosanović, Darko, Uskoković, Petar, Pavlović, Vladimir B., "Nanomechanical properties of PVDF–ZnO polymer nanocomposite" in Materials Science and Engineering: B, 287 (2023):116126,
https://doi.org/10.1016/j.mseb.2022.116126 .,
https://hdl.handle.net/21.15107/rcub_dais_13436 .

Nanomechanical properties of PVDF–ZnO polymer nanocomposite

Peleš Tadić, Adriana; Blagojević, Vladimir A.; Stojanović, Dušica; Ostojić, Sanja B.; Tasić, Nikola; Kosanović, Darko; Uskoković, Petar; Pavlović, Vladimir B.

(Elsevier BV, 2023)

TY  - JOUR
AU  - Peleš Tadić, Adriana
AU  - Blagojević, Vladimir A.
AU  - Stojanović, Dušica
AU  - Ostojić, Sanja B.
AU  - Tasić, Nikola
AU  - Kosanović, Darko
AU  - Uskoković, Petar
AU  - Pavlović, Vladimir B.
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/13436
AB  - Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF.
PB  - Elsevier BV
T2  - Materials Science and Engineering: B
T1  - Nanomechanical properties of PVDF–ZnO polymer nanocomposite
SP  - 116126
VL  - 287
DO  - 10.1016/j.mseb.2022.116126
UR  - https://hdl.handle.net/21.15107/rcub_dais_13436
ER  - 
@article{
author = "Peleš Tadić, Adriana and Blagojević, Vladimir A. and Stojanović, Dušica and Ostojić, Sanja B. and Tasić, Nikola and Kosanović, Darko and Uskoković, Petar and Pavlović, Vladimir B.",
year = "2023",
abstract = "Poly(vinylidenefluoride)–ZnO (PVDF–ZnO) nanocomposites with mechanically activated ZnO nanoparticle fillers were investigated using thermal and mechanical analysis and AFM and PFM. Differential scanning calorimetry (DSC) investigated the effect of ZnO nanoparticles on the crystallinity of the polymer, under controlled heating and cooling. Atomic force (AFM) microscopy was used to record the surfaces of the samples. Nanocomposite surface roughness shows the presence of the different phases inside of the matrix, where rough samples contain a higher proportion of the β phase. PFM was performed to investigate the piezoresponse of the composites. Nanoidentation showed that the mechanical activation of the filler (ZnO) increases the Young modulus with the activation time. Molecular simulations in periodic systems (PVDF–ZnO spherical nanocluster and nanocylinder composite) were used to investigate the influence of particle size and shape on the Young modulus of different phases of PVDF.",
publisher = "Elsevier BV",
journal = "Materials Science and Engineering: B",
title = "Nanomechanical properties of PVDF–ZnO polymer nanocomposite",
pages = "116126",
volume = "287",
doi = "10.1016/j.mseb.2022.116126",
url = "https://hdl.handle.net/21.15107/rcub_dais_13436"
}
Peleš Tadić, A., Blagojević, V. A., Stojanović, D., Ostojić, S. B., Tasić, N., Kosanović, D., Uskoković, P.,& Pavlović, V. B.. (2023). Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering: B
Elsevier BV., 287, 116126.
https://doi.org/10.1016/j.mseb.2022.116126
https://hdl.handle.net/21.15107/rcub_dais_13436
Peleš Tadić A, Blagojević VA, Stojanović D, Ostojić SB, Tasić N, Kosanović D, Uskoković P, Pavlović VB. Nanomechanical properties of PVDF–ZnO polymer nanocomposite. in Materials Science and Engineering: B. 2023;287:116126.
doi:10.1016/j.mseb.2022.116126
https://hdl.handle.net/21.15107/rcub_dais_13436 .
Peleš Tadić, Adriana, Blagojević, Vladimir A., Stojanović, Dušica, Ostojić, Sanja B., Tasić, Nikola, Kosanović, Darko, Uskoković, Petar, Pavlović, Vladimir B., "Nanomechanical properties of PVDF–ZnO polymer nanocomposite" in Materials Science and Engineering: B, 287 (2023):116126,
https://doi.org/10.1016/j.mseb.2022.116126 .,
https://hdl.handle.net/21.15107/rcub_dais_13436 .

Structural properties of FeCoV alloys produced by PIM / MIM technology

Nedeljković, Borivoje; Pavlović, Vladimir B.; Obradović, Nina; Mitrović, Nebojša S.

(Belgrade : Serbian Ceramic Society, 2022)

TY  - CONF
AU  - Nedeljković, Borivoje
AU  - Pavlović, Vladimir B.
AU  - Obradović, Nina
AU  - Mitrović, Nebojša S.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13620
AB  - FeCoV alloys with high saturation magnetization and high Curie temperature, making them useful for high-temperature and power-dense applications (e. g. aviation device). In this study, we report the results of observing the structural properties of 49Fe49Co2V alloy produced by PIM / MIM technology. The starting granulate was prepared by mixing FeCoV powder with a low-viscosity binder. After injection, the raw “green” samples were first treated with a solvent and then thermally with the same aim of removing the binder. MIM technology is completed by high-temperature sintering of “brown” samples for 3.5 hours at temperatures from 1370 OC to 1460 OC in a hydrogen atmosphere, which provides the necessary magnetic and mechanical characteristics. Depending on the sintering temperature, structural parameters of particle size Dmax, Feret X, Feret Y were investigated and analysed.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
T1  - Structural properties of FeCoV alloys produced by PIM / MIM technology
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_dais_13620
ER  - 
@conference{
author = "Nedeljković, Borivoje and Pavlović, Vladimir B. and Obradović, Nina and Mitrović, Nebojša S.",
year = "2022",
abstract = "FeCoV alloys with high saturation magnetization and high Curie temperature, making them useful for high-temperature and power-dense applications (e. g. aviation device). In this study, we report the results of observing the structural properties of 49Fe49Co2V alloy produced by PIM / MIM technology. The starting granulate was prepared by mixing FeCoV powder with a low-viscosity binder. After injection, the raw “green” samples were first treated with a solvent and then thermally with the same aim of removing the binder. MIM technology is completed by high-temperature sintering of “brown” samples for 3.5 hours at temperatures from 1370 OC to 1460 OC in a hydrogen atmosphere, which provides the necessary magnetic and mechanical characteristics. Depending on the sintering temperature, structural parameters of particle size Dmax, Feret X, Feret Y were investigated and analysed.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.",
title = "Structural properties of FeCoV alloys produced by PIM / MIM technology",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_dais_13620"
}
Nedeljković, B., Pavlović, V. B., Obradović, N.,& Mitrović, N. S.. (2022). Structural properties of FeCoV alloys produced by PIM / MIM technology. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
Belgrade : Serbian Ceramic Society., 57-57.
https://hdl.handle.net/21.15107/rcub_dais_13620
Nedeljković B, Pavlović VB, Obradović N, Mitrović NS. Structural properties of FeCoV alloys produced by PIM / MIM technology. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.. 2022;:57-57.
https://hdl.handle.net/21.15107/rcub_dais_13620 .
Nedeljković, Borivoje, Pavlović, Vladimir B., Obradović, Nina, Mitrović, Nebojša S., "Structural properties of FeCoV alloys produced by PIM / MIM technology" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022. (2022):57-57,
https://hdl.handle.net/21.15107/rcub_dais_13620 .

Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3

Vujančević, Jelena; Blagojević, Vladimir A.; Andričević, Pavao; Pavlović, Vera P.; Horváth, Endre; Forró, László; Vlahović, Branislav; Pavlović, Vladimir B.; Janaćković, Đorđe

(Belgrade : Serbian Ceramic Society, 2022)

TY  - CONF
AU  - Vujančević, Jelena
AU  - Blagojević, Vladimir A.
AU  - Andričević, Pavao
AU  - Pavlović, Vera P.
AU  - Horváth, Endre
AU  - Forró, László
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13627
AB  - The aim of this study was to investigate the influence of the deposition of vanadium oxide epitaxial layer on the photoresponse of TiO2/CH3NH3PbI3 heterojunction. TiO2 nanotube array was synthesized via anodization of titanium foil at three different voltages. After annealing at 450 °C, vanadium oxide was deposited by direct deposition from vanadyl(IV) sulfate solution. Microstructure analysis has been used for the investigation of the influence of different voltages of anodization on tube diameter. Spectroscopy measurements pointed out the red shift in diffusion reflectance spectra after deposition of vanadium oxide. The presence of V5+ oxidation state has been detected on the surface of nanotube arrays by chemical analysis. CH3NH3PbI3 monocrystal was dry pressed on top of the nanotubes in order to make a photodiode. The current-voltage characteristics of the photodiode were recorded and it was observed that the sample with the smallest wall thickness and higher amount of vanadium has the best photocurrent response.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
T1  - Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3
SP  - 90
EP  - 90
UR  - https://hdl.handle.net/21.15107/rcub_dais_13627
ER  - 
@conference{
author = "Vujančević, Jelena and Blagojević, Vladimir A. and Andričević, Pavao and Pavlović, Vera P. and Horváth, Endre and Forró, László and Vlahović, Branislav and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2022",
abstract = "The aim of this study was to investigate the influence of the deposition of vanadium oxide epitaxial layer on the photoresponse of TiO2/CH3NH3PbI3 heterojunction. TiO2 nanotube array was synthesized via anodization of titanium foil at three different voltages. After annealing at 450 °C, vanadium oxide was deposited by direct deposition from vanadyl(IV) sulfate solution. Microstructure analysis has been used for the investigation of the influence of different voltages of anodization on tube diameter. Spectroscopy measurements pointed out the red shift in diffusion reflectance spectra after deposition of vanadium oxide. The presence of V5+ oxidation state has been detected on the surface of nanotube arrays by chemical analysis. CH3NH3PbI3 monocrystal was dry pressed on top of the nanotubes in order to make a photodiode. The current-voltage characteristics of the photodiode were recorded and it was observed that the sample with the smallest wall thickness and higher amount of vanadium has the best photocurrent response.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.",
title = "Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3",
pages = "90-90",
url = "https://hdl.handle.net/21.15107/rcub_dais_13627"
}
Vujančević, J., Blagojević, V. A., Andričević, P., Pavlović, V. P., Horváth, E., Forró, L., Vlahović, B., Pavlović, V. B.,& Janaćković, Đ.. (2022). Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
Belgrade : Serbian Ceramic Society., 90-90.
https://hdl.handle.net/21.15107/rcub_dais_13627
Vujančević J, Blagojević VA, Andričević P, Pavlović VP, Horváth E, Forró L, Vlahović B, Pavlović VB, Janaćković Đ. Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.. 2022;:90-90.
https://hdl.handle.net/21.15107/rcub_dais_13627 .
Vujančević, Jelena, Blagojević, Vladimir A., Andričević, Pavao, Pavlović, Vera P., Horváth, Endre, Forró, László, Vlahović, Branislav, Pavlović, Vladimir B., Janaćković, Đorđe, "Characteristic of photodiode based on vanadium oxide-TiO2 nanotubes/CH3NH3PbI3" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022. (2022):90-90,
https://hdl.handle.net/21.15107/rcub_dais_13627 .

Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites

Peleš Tadić, Adriana; Obradović, Nina; Kosanović, Darko; Blagojević, Vladimir A.; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2022)

TY  - CONF
AU  - Peleš Tadić, Adriana
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13601
AB  - The research is based on the synthesis and characterization of polymer nanocomposites based on Poly(vinylidene fluoride) (PVDF) polymer and mechanically activated zinc oxide powder. In order to produce the polymer nanocomposite with enchanced electrical and mechanical properties different amount of the mechanicaly activated zinc oxide powder was used as a filler in PVDF polymer. PVDF (Mw∼530 000) was used without further purification. Mechanical activation of the powder was performed in a planetary mechanochemical activator (mill) with tungsten carbide balls. Activation times were 10 and 30 minutes. Ball to sample mass ratio was 40:1, while the rotation speed was 390 rpm. After the mentioned procedure, PVDF and nanocomposite films (50 μm) were obtained by casting the solutions into Petri dishes. The percentage of ZnO powder inside the polymer matrix was 5% for powder mechanically activated for 30 minutes, while for powders activated for 10 minutes the percentages were 2.5%, 5% and 10%. From the obtained results it can be concluded that the bigger amount of powder as a filler inside polymer matrix can be substituted with the prolonged time of mechanical activation time and have enhanced electrical properties also saving material and making the production of nanocomposites more economical.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor
T1  - Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_dais_13601
ER  - 
@conference{
author = "Peleš Tadić, Adriana and Obradović, Nina and Kosanović, Darko and Blagojević, Vladimir A. and Pavlović, Vladimir B.",
year = "2022",
abstract = "The research is based on the synthesis and characterization of polymer nanocomposites based on Poly(vinylidene fluoride) (PVDF) polymer and mechanically activated zinc oxide powder. In order to produce the polymer nanocomposite with enchanced electrical and mechanical properties different amount of the mechanicaly activated zinc oxide powder was used as a filler in PVDF polymer. PVDF (Mw∼530 000) was used without further purification. Mechanical activation of the powder was performed in a planetary mechanochemical activator (mill) with tungsten carbide balls. Activation times were 10 and 30 minutes. Ball to sample mass ratio was 40:1, while the rotation speed was 390 rpm. After the mentioned procedure, PVDF and nanocomposite films (50 μm) were obtained by casting the solutions into Petri dishes. The percentage of ZnO powder inside the polymer matrix was 5% for powder mechanically activated for 30 minutes, while for powders activated for 10 minutes the percentages were 2.5%, 5% and 10%. From the obtained results it can be concluded that the bigger amount of powder as a filler inside polymer matrix can be substituted with the prolonged time of mechanical activation time and have enhanced electrical properties also saving material and making the production of nanocomposites more economical.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor",
title = "Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_dais_13601"
}
Peleš Tadić, A., Obradović, N., Kosanović, D., Blagojević, V. A.,& Pavlović, V. B.. (2022). Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites. in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 86-86.
https://hdl.handle.net/21.15107/rcub_dais_13601
Peleš Tadić A, Obradović N, Kosanović D, Blagojević VA, Pavlović VB. Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites. in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor. 2022;:86-86.
https://hdl.handle.net/21.15107/rcub_dais_13601 .
Peleš Tadić, Adriana, Obradović, Nina, Kosanović, Darko, Blagojević, Vladimir A., Pavlović, Vladimir B., "Influence of mechanically activated ZnO powder content as a filler of polymer nanocomposites" in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor (2022):86-86,
https://hdl.handle.net/21.15107/rcub_dais_13601 .

Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders

Živojinović, Jelena; Kosanović, Darko; Blagojević, Vladimir A.; Pavlović, Vera P.; Ćirković, Jovana; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2022)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vera P.
AU  - Ćirković, Jovana
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13600
AB  - Manganese doped SrTiO3 powders with various manganese dioxide weight percentages in the range of 1.5, 3 and 6 wp% were prepared by a solid-state method in the presence of mechanical activation (10, 30 and 120 minutes). A systematic investigation by X-ray diffraction (XRD), scanning electron microscopy (SEM), particle size analisys (PSA), Brunauer-Emmett-Teller (BET) methods and Raman spectroscopy has been undertaken to evaluate the role of dopants on the microstructural and morphological study of the perovskite oxide obtained. The optical properties of the different manganese doped and activated SrTiO3 powders have been also evaluated. Mn insertion in SrTiO3 is discussed considering the possibility for Mn ions to occupy both Ti4+ and Sr2+ sites as well as manganese segregation and Mn incorporation-related non-homogeneities. The results demonstrated that Mn has substituted into the lattice and surface layers of the particles of SrTiO3 powders and the absorption onset shifted to higher values of wavelengths with increasing time of activation and dopant concentration. The lowest value of the band gap (Eg=3.10 eV) was registered with the longest activation for 120 minutes and the highest concentration of dopant (6 wp%). Combining doping with mechanical activation lower values of band gap can be achieved and that fact could be used in subsequent studies to make Mn-SrTiO3 more suitable visible-light photocatalysts.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor, Serbia
T1  - Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders
SP  - 82
EP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_dais_13600
ER  - 
@conference{
author = "Živojinović, Jelena and Kosanović, Darko and Blagojević, Vladimir A. and Pavlović, Vera P. and Ćirković, Jovana and Pavlović, Vladimir B.",
year = "2022",
abstract = "Manganese doped SrTiO3 powders with various manganese dioxide weight percentages in the range of 1.5, 3 and 6 wp% were prepared by a solid-state method in the presence of mechanical activation (10, 30 and 120 minutes). A systematic investigation by X-ray diffraction (XRD), scanning electron microscopy (SEM), particle size analisys (PSA), Brunauer-Emmett-Teller (BET) methods and Raman spectroscopy has been undertaken to evaluate the role of dopants on the microstructural and morphological study of the perovskite oxide obtained. The optical properties of the different manganese doped and activated SrTiO3 powders have been also evaluated. Mn insertion in SrTiO3 is discussed considering the possibility for Mn ions to occupy both Ti4+ and Sr2+ sites as well as manganese segregation and Mn incorporation-related non-homogeneities. The results demonstrated that Mn has substituted into the lattice and surface layers of the particles of SrTiO3 powders and the absorption onset shifted to higher values of wavelengths with increasing time of activation and dopant concentration. The lowest value of the band gap (Eg=3.10 eV) was registered with the longest activation for 120 minutes and the highest concentration of dopant (6 wp%). Combining doping with mechanical activation lower values of band gap can be achieved and that fact could be used in subsequent studies to make Mn-SrTiO3 more suitable visible-light photocatalysts.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor, Serbia",
title = "Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders",
pages = "82-82",
url = "https://hdl.handle.net/21.15107/rcub_dais_13600"
}
Živojinović, J., Kosanović, D., Blagojević, V. A., Pavlović, V. P., Ćirković, J.,& Pavlović, V. B.. (2022). Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders. in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 82-82.
https://hdl.handle.net/21.15107/rcub_dais_13600
Živojinović J, Kosanović D, Blagojević VA, Pavlović VP, Ćirković J, Pavlović VB. Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders. in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor, Serbia. 2022;:82-82.
https://hdl.handle.net/21.15107/rcub_dais_13600 .
Živojinović, Jelena, Kosanović, Darko, Blagojević, Vladimir A., Pavlović, Vera P., Ćirković, Jovana, Pavlović, Vladimir B., "Influence of MN doping on the evolution of microstructure and optical properties of mechanically activated SrTiO3 powders" in Programme [Elektronski izvor] ; and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2022, 05-08 July 2022, Zlatibor, Serbia (2022):82-82,
https://hdl.handle.net/21.15107/rcub_dais_13600 .

Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD

Vujančević, Jelena; Bjelajac, Anđelika; Horváth, Endre; Forró, Laszlo; Pavlović, Vladimir B.; Janaćković, Đorđe

(Belgrade : Materials Research Society of Serbia, 2022)

TY  - CONF
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Horváth, Endre
AU  - Forró, Laszlo
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13597
AB  - The negative consequences of the modern world are environmental pollution. To decrease it, a lot of research is focused on finding solution for its remediation. Photoactive materials have ability to utilize solar energy for the degradation of organic and inorganic pollutants. Among different photoactive material TiO2 has advantages due to its non-toxicity, chemical stability and corrosion resistance. The aim of this study was to investigate the synergetic effect of nitrogen incorporation into crystal structure of TiO2 and deposition of CdS onto amelioration of the photocatalytic degradation of methylen orange compared to the pristine TiO2. For that purpose TiO2 nanotubes were obtained by anodization of titanium foil in HF containing electrolyte. To achieve crystal structure and at the same time to introduce nitrogen in TiO2, the samples were annealed in ammonia atmosphere at 450 °C, for different time of annealing. The highest amount of nitrogen was achieved for the shortest time of annealing (30 min). Beside that, it was observed that the highest level of interstitial nitrogen was also achieved for the shortest time of annealing. Further, CdS quantum dots (QDs) were deposited on the nitrogen doped TiO2 nanotubes via an ex-situ method (using binding reagent). According to the FESEM micrographs, a partial agglomeration of CdS QDs on some domaines on top of the nanotubes was observed. By performing the DRS, the improvement of the optical response after nitrogen doping and deposition of CdS was demonstrated. The sample with the highest amount of total nitrogen and interstitial nitrogen in combination with deposition CdS QDs exhibited the highest photocatalytic efficiency.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
T1  - Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD
SP  - 140
EP  - 140
UR  - https://hdl.handle.net/21.15107/rcub_dais_13597
ER  - 
@conference{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Horváth, Endre and Forró, Laszlo and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2022",
abstract = "The negative consequences of the modern world are environmental pollution. To decrease it, a lot of research is focused on finding solution for its remediation. Photoactive materials have ability to utilize solar energy for the degradation of organic and inorganic pollutants. Among different photoactive material TiO2 has advantages due to its non-toxicity, chemical stability and corrosion resistance. The aim of this study was to investigate the synergetic effect of nitrogen incorporation into crystal structure of TiO2 and deposition of CdS onto amelioration of the photocatalytic degradation of methylen orange compared to the pristine TiO2. For that purpose TiO2 nanotubes were obtained by anodization of titanium foil in HF containing electrolyte. To achieve crystal structure and at the same time to introduce nitrogen in TiO2, the samples were annealed in ammonia atmosphere at 450 °C, for different time of annealing. The highest amount of nitrogen was achieved for the shortest time of annealing (30 min). Beside that, it was observed that the highest level of interstitial nitrogen was also achieved for the shortest time of annealing. Further, CdS quantum dots (QDs) were deposited on the nitrogen doped TiO2 nanotubes via an ex-situ method (using binding reagent). According to the FESEM micrographs, a partial agglomeration of CdS QDs on some domaines on top of the nanotubes was observed. By performing the DRS, the improvement of the optical response after nitrogen doping and deposition of CdS was demonstrated. The sample with the highest amount of total nitrogen and interstitial nitrogen in combination with deposition CdS QDs exhibited the highest photocatalytic efficiency.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022",
title = "Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD",
pages = "140-140",
url = "https://hdl.handle.net/21.15107/rcub_dais_13597"
}
Vujančević, J., Bjelajac, A., Horváth, E., Forró, L., Pavlović, V. B.,& Janaćković, Đ.. (2022). Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
Belgrade : Materials Research Society of Serbia., 140-140.
https://hdl.handle.net/21.15107/rcub_dais_13597
Vujančević J, Bjelajac A, Horváth E, Forró L, Pavlović VB, Janaćković Đ. Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022. 2022;:140-140.
https://hdl.handle.net/21.15107/rcub_dais_13597 .
Vujančević, Jelena, Bjelajac, Anđelika, Horváth, Endre, Forró, Laszlo, Pavlović, Vladimir B., Janaćković, Đorđe, "Photocatalytic activity of N-TiO2 nanotubes decorated with CdS QD" in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022 (2022):140-140,
https://hdl.handle.net/21.15107/rcub_dais_13597 .

Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics

Živojinović, Jelena; Kosanović, Darko; Pavlović, Vera P.; Tadić, Nenad; Pavlović, Vladimir B.

(Belgrade : Materials Research Society of Serbia, 2022)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Kosanović, Darko
AU  - Pavlović, Vera P.
AU  - Tadić, Nenad
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13596
AB  - The influence of Mn incorporation into the Sr and Ti sites of SrTiO3 ceramics on the structure, microstructure and dielectric tunability was studied. Manganese doped SrTiO3 ceramics with various manganese dioxide weight percentages (1.5, 3 and 6 wt %) were prepared by a solid-state method in the presence of mechanical activation (10, 30 and 120 minutes). According to Ritveld's analysis it was found that the size of the crystallite in doped activated SrTiO3 ceramics is smaller than the size of the crystallite in undoped ceramics. This lower degree of crystallinity is a consequence of additional distortion of the crystal structure due to ion substitution. SEM analysis showed that with increasing dopant concentration in the sample, at the same time as a time of mechanical activation, the grain size decreases, which is explained by the increasingly dominant incorporation of Mn4+ ions at sites of Ti4+ ions. On the Raman spectra of doped ceramic samples, the appearance of a peak at 750 cm-1 was observed, its change in intensity with the increase of dopant concentration indicates the incorporation of dopant in the SrTiO3 lattice. It was stated that mechanical activation leads to a more pronounced increase in the intensity of the mentioned peak, i.e. that activation leads to effectively higher incorporation of dopant into the strontium-titanate lattice. Higher values of relative dielectric permittivity of doped SrTiO3 ceramics were observed for 1.5 wt %, in relation to inactivated and activated undoped ceramics. Based on all previous analysis, it is estimated that this can be related not only to higher sample densities but also to the contribution of Mn2+ ion incorporation at Sr2+ ion positions in the lattice. Based on all the above, the optimal electrical properties of SrTiO3 ceramics can be achieved by the appropriate choice of mechanical activation time and dopant concentration.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
T1  - Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics
SP  - 131
EP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_dais_13596
ER  - 
@conference{
author = "Živojinović, Jelena and Kosanović, Darko and Pavlović, Vera P. and Tadić, Nenad and Pavlović, Vladimir B.",
year = "2022",
abstract = "The influence of Mn incorporation into the Sr and Ti sites of SrTiO3 ceramics on the structure, microstructure and dielectric tunability was studied. Manganese doped SrTiO3 ceramics with various manganese dioxide weight percentages (1.5, 3 and 6 wt %) were prepared by a solid-state method in the presence of mechanical activation (10, 30 and 120 minutes). According to Ritveld's analysis it was found that the size of the crystallite in doped activated SrTiO3 ceramics is smaller than the size of the crystallite in undoped ceramics. This lower degree of crystallinity is a consequence of additional distortion of the crystal structure due to ion substitution. SEM analysis showed that with increasing dopant concentration in the sample, at the same time as a time of mechanical activation, the grain size decreases, which is explained by the increasingly dominant incorporation of Mn4+ ions at sites of Ti4+ ions. On the Raman spectra of doped ceramic samples, the appearance of a peak at 750 cm-1 was observed, its change in intensity with the increase of dopant concentration indicates the incorporation of dopant in the SrTiO3 lattice. It was stated that mechanical activation leads to a more pronounced increase in the intensity of the mentioned peak, i.e. that activation leads to effectively higher incorporation of dopant into the strontium-titanate lattice. Higher values of relative dielectric permittivity of doped SrTiO3 ceramics were observed for 1.5 wt %, in relation to inactivated and activated undoped ceramics. Based on all previous analysis, it is estimated that this can be related not only to higher sample densities but also to the contribution of Mn2+ ion incorporation at Sr2+ ion positions in the lattice. Based on all the above, the optimal electrical properties of SrTiO3 ceramics can be achieved by the appropriate choice of mechanical activation time and dopant concentration.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022",
title = "Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics",
pages = "131-131",
url = "https://hdl.handle.net/21.15107/rcub_dais_13596"
}
Živojinović, J., Kosanović, D., Pavlović, V. P., Tadić, N.,& Pavlović, V. B.. (2022). Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
Belgrade : Materials Research Society of Serbia., 131-131.
https://hdl.handle.net/21.15107/rcub_dais_13596
Živojinović J, Kosanović D, Pavlović VP, Tadić N, Pavlović VB. Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022. 2022;:131-131.
https://hdl.handle.net/21.15107/rcub_dais_13596 .
Živojinović, Jelena, Kosanović, Darko, Pavlović, Vera P., Tadić, Nenad, Pavlović, Vladimir B., "Study of influence of Mn dopant on dielectric response of SrTiO3 ceramics" in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022 (2022):131-131,
https://hdl.handle.net/21.15107/rcub_dais_13596 .

Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration

Kilanski, Lukasz; Lewinska, Sabina; Slawska-Waniewska, Anna; Pavlović, Vladimir B.; Filipović, Suzana

(2022)

TY  - JOUR
AU  - Kilanski, Lukasz
AU  - Lewinska, Sabina
AU  - Slawska-Waniewska, Anna
AU  - Pavlović, Vladimir B.
AU  - Filipović, Suzana
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13561
AB  - The manuscript shows the studies of structural and magnetic properties of BaTiO3/Fe2O3 samples prepared using five different chemical routes. We show that the undertaken processes leaded to the decoration of BaTiO3 grains with hematite nanoparticles, but not to a creation of a well-defined core-shell structure. These studies revealed that a strong tendency of the iron-oxide nanoparticles to form agglomerates, significantly reduces the possibility of a continuous shell formation around the core, and at the same time it promotes inter-particle interactions between magnetic nanoparticles. A detailed analysis of the results obtained in the structural and magnetic studies, allowed to state that magnetic properties of these composites are dominated by the properties of fine iron-oxide nanopowder. The collected isothermal magnetization curves clearly indicate the canted antiferromagnetic properties characteristic for hematite, while the ac magnetization results exhibit the collective freezing process to the cluster glass like state (characteristic for interacting system of magnetic nanoparticles). This work provides detailed studies of systems prepared under different conditions and methods, which can serve as an important step towards obtaining well defined BaTiO3/Fe2O3 core-shell structures. © 2022 Elsevier B.V.
T2  - Inorganic Chemistry Communications
T1  - Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration
SP  - 109960
VL  - 145
DO  - 10.1016/j.inoche.2022.109960
UR  - https://hdl.handle.net/21.15107/rcub_dais_13561
ER  - 
@article{
author = "Kilanski, Lukasz and Lewinska, Sabina and Slawska-Waniewska, Anna and Pavlović, Vladimir B. and Filipović, Suzana",
year = "2022",
abstract = "The manuscript shows the studies of structural and magnetic properties of BaTiO3/Fe2O3 samples prepared using five different chemical routes. We show that the undertaken processes leaded to the decoration of BaTiO3 grains with hematite nanoparticles, but not to a creation of a well-defined core-shell structure. These studies revealed that a strong tendency of the iron-oxide nanoparticles to form agglomerates, significantly reduces the possibility of a continuous shell formation around the core, and at the same time it promotes inter-particle interactions between magnetic nanoparticles. A detailed analysis of the results obtained in the structural and magnetic studies, allowed to state that magnetic properties of these composites are dominated by the properties of fine iron-oxide nanopowder. The collected isothermal magnetization curves clearly indicate the canted antiferromagnetic properties characteristic for hematite, while the ac magnetization results exhibit the collective freezing process to the cluster glass like state (characteristic for interacting system of magnetic nanoparticles). This work provides detailed studies of systems prepared under different conditions and methods, which can serve as an important step towards obtaining well defined BaTiO3/Fe2O3 core-shell structures. © 2022 Elsevier B.V.",
journal = "Inorganic Chemistry Communications",
title = "Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration",
pages = "109960",
volume = "145",
doi = "10.1016/j.inoche.2022.109960",
url = "https://hdl.handle.net/21.15107/rcub_dais_13561"
}
Kilanski, L., Lewinska, S., Slawska-Waniewska, A., Pavlović, V. B.,& Filipović, S.. (2022). Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration. in Inorganic Chemistry Communications, 145, 109960.
https://doi.org/10.1016/j.inoche.2022.109960
https://hdl.handle.net/21.15107/rcub_dais_13561
Kilanski L, Lewinska S, Slawska-Waniewska A, Pavlović VB, Filipović S. Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration. in Inorganic Chemistry Communications. 2022;145:109960.
doi:10.1016/j.inoche.2022.109960
https://hdl.handle.net/21.15107/rcub_dais_13561 .
Kilanski, Lukasz, Lewinska, Sabina, Slawska-Waniewska, Anna, Pavlović, Vladimir B., Filipović, Suzana, "Attempts to obtain BaTiO3/Fe2O3 core-shell type structures: The role of iron oxide nanoparticle formation and agglomeration" in Inorganic Chemistry Communications, 145 (2022):109960,
https://doi.org/10.1016/j.inoche.2022.109960 .,
https://hdl.handle.net/21.15107/rcub_dais_13561 .
1

Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics

Živojinović, Jelena; Kosanović, Darko; Blagojević, Vladimir A.; Pavlović, Vera P.; Tadić, Nenad; Vlahović, Branislav; Pavlović, Vladimir B.

(2022)

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vera P.
AU  - Tadić, Nenad
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13510
AB  - In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.
T2  - Science of Sintering
T1  - Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics
SP  - 401
EP  - 414
VL  - 54
IS  - 4
DO  - 10.2298/SOS2204401Z
UR  - https://hdl.handle.net/21.15107/rcub_dais_13510
ER  - 
@article{
author = "Živojinović, Jelena and Kosanović, Darko and Blagojević, Vladimir A. and Pavlović, Vera P. and Tadić, Nenad and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2022",
abstract = "In this study, microstructure evolution and dielectric properties of SrTiO3 ceramic have been investigated, whereby mechanical activation of SrTiO3 powders was used to modify the functional properties of ceramic materials. Microstructural SEM analysis of SrTiO3 ceramics showed that the increase in mechanical activation time results in less porous samples. Raman spectroscopy indicated changes in the broadening and asymmetry of the TO2 mode with a change in the time of mechanical activation. TO2 mode showed a Fano asymmetry due to its interaction with polarization fluctuations in polar micro-regions, which are a consequence of the presence of oxygen vacancies caused by activation. The maximum value of dielectric permittivity was observed in the sample activated for 10 min. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.",
journal = "Science of Sintering",
title = "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics",
pages = "401-414",
volume = "54",
number = "4",
doi = "10.2298/SOS2204401Z",
url = "https://hdl.handle.net/21.15107/rcub_dais_13510"
}
Živojinović, J., Kosanović, D., Blagojević, V. A., Pavlović, V. P., Tadić, N., Vlahović, B.,& Pavlović, V. B.. (2022). Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering, 54(4), 401-414.
https://doi.org/10.2298/SOS2204401Z
https://hdl.handle.net/21.15107/rcub_dais_13510
Živojinović J, Kosanović D, Blagojević VA, Pavlović VP, Tadić N, Vlahović B, Pavlović VB. Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics. in Science of Sintering. 2022;54(4):401-414.
doi:10.2298/SOS2204401Z
https://hdl.handle.net/21.15107/rcub_dais_13510 .
Živojinović, Jelena, Kosanović, Darko, Blagojević, Vladimir A., Pavlović, Vera P., Tadić, Nenad, Vlahović, Branislav, Pavlović, Vladimir B., "Dielectric Properties of Mechanically Activated Strontium Titanate Ceramics" in Science of Sintering, 54, no. 4 (2022):401-414,
https://doi.org/10.2298/SOS2204401Z .,
https://hdl.handle.net/21.15107/rcub_dais_13510 .

Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent

Popović, Mina; Veličković, Zlate S.; Bogdanov, Jovica; Marinković, Aleksandar D.; Luna, Mariano Casas; Trajković, Isaak; Obradović, Nina; Pavlović, Vladimir B.

(International Institute for the Science of Sintering (IISS), 2022)

TY  - JOUR
AU  - Popović, Mina
AU  - Veličković, Zlate S.
AU  - Bogdanov, Jovica
AU  - Marinković, Aleksandar D.
AU  - Luna, Mariano Casas
AU  - Trajković, Isaak
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/12955
AB  - In this study, the structure, morphology and composition of the synthesized magnetite/3D-printed wollastonite (3D_W/M) composite were characterized, and its adsorption performance with respect to As(V) and Cr(VI) were studied. Magnetite (MG) modified 3D printed wollastonite was obtained by two step procedure: modification of 3D_W with 3-aminoproylsilane (APTES) followed by controlled magnetite (MG) deposition to obtain 3D_W/M adsorbent. The structure/properties of 3D_W/M were confirmed by applying FTIR, XRD, TGD/DTA, and SEM analysis. The adsorption properties of hybrid adsorbents were carried out for As(V) and Cr(VI) removal-one relative to the initial pH value, the adsorbent mass, the temperature, and the adsorption time. Time-dependent adsorption study was best described by pseudo-second order equation, while Weber Morris analysis showed that intraparticle diffusion controled diffusional transport. Similar activation energy, 17.44 and 14.49 kJ•mol-1 for adsorption As(V) and Cr(VI) on 3D_W/M, respectively, indicated main contribution of physical adsorption. Determination of adsorption parameters was performed by applying different adsorption isotherm models, and the best fit was obtained using Freundlich model. The adsorption capacity of 24.16 and 29.6 mg g-1 for As(V) and Cr(VI) at 2o C, Co = 5.5 and 5.3 mg L-1, respectively, were obtained. Thermodynamic study indicated favourable process at a higher temperature. Preliminary fixed-bed column study and results fitting with Bohart-Adams, Yoon-Nelson, Thomas, and Modified dose-response model showed good agreement with results from the batch study.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent
SP  - 105
EP  - 124
VL  - 54
IS  - 1
DO  - 10.2298/SOS2201105P
UR  - https://hdl.handle.net/21.15107/rcub_dais_12955
ER  - 
@article{
author = "Popović, Mina and Veličković, Zlate S. and Bogdanov, Jovica and Marinković, Aleksandar D. and Luna, Mariano Casas and Trajković, Isaak and Obradović, Nina and Pavlović, Vladimir B.",
year = "2022",
abstract = "In this study, the structure, morphology and composition of the synthesized magnetite/3D-printed wollastonite (3D_W/M) composite were characterized, and its adsorption performance with respect to As(V) and Cr(VI) were studied. Magnetite (MG) modified 3D printed wollastonite was obtained by two step procedure: modification of 3D_W with 3-aminoproylsilane (APTES) followed by controlled magnetite (MG) deposition to obtain 3D_W/M adsorbent. The structure/properties of 3D_W/M were confirmed by applying FTIR, XRD, TGD/DTA, and SEM analysis. The adsorption properties of hybrid adsorbents were carried out for As(V) and Cr(VI) removal-one relative to the initial pH value, the adsorbent mass, the temperature, and the adsorption time. Time-dependent adsorption study was best described by pseudo-second order equation, while Weber Morris analysis showed that intraparticle diffusion controled diffusional transport. Similar activation energy, 17.44 and 14.49 kJ•mol-1 for adsorption As(V) and Cr(VI) on 3D_W/M, respectively, indicated main contribution of physical adsorption. Determination of adsorption parameters was performed by applying different adsorption isotherm models, and the best fit was obtained using Freundlich model. The adsorption capacity of 24.16 and 29.6 mg g-1 for As(V) and Cr(VI) at 2o C, Co = 5.5 and 5.3 mg L-1, respectively, were obtained. Thermodynamic study indicated favourable process at a higher temperature. Preliminary fixed-bed column study and results fitting with Bohart-Adams, Yoon-Nelson, Thomas, and Modified dose-response model showed good agreement with results from the batch study.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent",
pages = "105-124",
volume = "54",
number = "1",
doi = "10.2298/SOS2201105P",
url = "https://hdl.handle.net/21.15107/rcub_dais_12955"
}
Popović, M., Veličković, Z. S., Bogdanov, J., Marinković, A. D., Luna, M. C., Trajković, I., Obradović, N.,& Pavlović, V. B.. (2022). Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 54(1), 105-124.
https://doi.org/10.2298/SOS2201105P
https://hdl.handle.net/21.15107/rcub_dais_12955
Popović M, Veličković ZS, Bogdanov J, Marinković AD, Luna MC, Trajković I, Obradović N, Pavlović VB. Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent. in Science of Sintering. 2022;54(1):105-124.
doi:10.2298/SOS2201105P
https://hdl.handle.net/21.15107/rcub_dais_12955 .
Popović, Mina, Veličković, Zlate S., Bogdanov, Jovica, Marinković, Aleksandar D., Luna, Mariano Casas, Trajković, Isaak, Obradović, Nina, Pavlović, Vladimir B., "Removal of the As(V) and Cr(VI) from the Water Using Magnetite/3D-Printed Wollastonite Hybrid Adsorbent" in Science of Sintering, 54, no. 1 (2022):105-124,
https://doi.org/10.2298/SOS2201105P .,
https://hdl.handle.net/21.15107/rcub_dais_12955 .
1
1

Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties

Mirković, Miljana; Filipović, Suzana; Kalijadis, Ana; Mašković, Pavle; Mašković, Jelena; Vlahović, Branislav; Pavlović, Vladimir B.

(2022)

TY  - JOUR
AU  - Mirković, Miljana
AU  - Filipović, Suzana
AU  - Kalijadis, Ana
AU  - Mašković, Pavle
AU  - Mašković, Jelena
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13153
AB  - Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.
T2  - Antibiotics
T1  - Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties
SP  - 592
VL  - 11
IS  - 5
DO  - 10.3390/antibiotics11050592
UR  - https://hdl.handle.net/21.15107/rcub_dais_13153
ER  - 
@article{
author = "Mirković, Miljana and Filipović, Suzana and Kalijadis, Ana and Mašković, Pavle and Mašković, Jelena and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2022",
abstract = "Due to the growing number of people infected with the new coronavirus globally, which weakens immunity, there has been an increase in bacterial infections. Hence, knowledge about simple and low-cost synthesis methods of materials with good structural and antimicrobial properties is of great importance. A material obtained through the combination of a nanoscale hydroxyapatite material (with good biocompatibility) and titanium dioxide (with good degradation properties of organic molecules) can absorb and decompose bacteria. In this investigation, three different synthesis routes used to prepare hydroxyapatite/titanium dioxide nanomaterials are examined. The morphology and semiquantitative chemical composition are characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). The obtained materials’ phase and structural characterization are determined using the X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials are in the range of 8 nm to 15 nm. Based on XRD peak positions, the hexagonal hydroxyapatite phases are formed in all samples along with TiO2 anatase and rutile phases. According to SEM and TEM analyses, the morphology of the prepared samples differs depending on the synthesis route. The EDX analysis confirmed the presence of Ti, Ca, P, and O in the obtained materials. The IR spectroscopy verified the vibration bands characteristic for HAp and titanium. The investigated materials show excellent antimicrobial and photocatalytic properties.",
journal = "Antibiotics",
title = "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties",
pages = "592",
volume = "11",
number = "5",
doi = "10.3390/antibiotics11050592",
url = "https://hdl.handle.net/21.15107/rcub_dais_13153"
}
Mirković, M., Filipović, S., Kalijadis, A., Mašković, P., Mašković, J., Vlahović, B.,& Pavlović, V. B.. (2022). Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics, 11(5), 592.
https://doi.org/10.3390/antibiotics11050592
https://hdl.handle.net/21.15107/rcub_dais_13153
Mirković M, Filipović S, Kalijadis A, Mašković P, Mašković J, Vlahović B, Pavlović VB. Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties. in Antibiotics. 2022;11(5):592.
doi:10.3390/antibiotics11050592
https://hdl.handle.net/21.15107/rcub_dais_13153 .
Mirković, Miljana, Filipović, Suzana, Kalijadis, Ana, Mašković, Pavle, Mašković, Jelena, Vlahović, Branislav, Pavlović, Vladimir B., "Hydroxyapatite/TiO2 Nanomaterial with Defined Microstructural and Good Antimicrobial Properties" in Antibiotics, 11, no. 5 (2022):592,
https://doi.org/10.3390/antibiotics11050592 .,
https://hdl.handle.net/21.15107/rcub_dais_13153 .
1

Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials

Janićijević, Aleksandra; Pavlović, Vera P.; Kovačević, Danijela; Perić, Marko; Vlahović, Branislav; Pavlović, Vladimir B.; Filipović, Suzana

(2022)

TY  - JOUR
AU  - Janićijević, Aleksandra
AU  - Pavlović, Vera P.
AU  - Kovačević, Danijela
AU  - Perić, Marko
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
AU  - Filipović, Suzana
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13152
AB  - The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.
T2  - Polymers
T1  - Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials
SP  - 1819
VL  - 14
IS  - 9
DO  - 10.3390/polym14091819
UR  - https://hdl.handle.net/21.15107/rcub_dais_13152
ER  - 
@article{
author = "Janićijević, Aleksandra and Pavlović, Vera P. and Kovačević, Danijela and Perić, Marko and Vlahović, Branislav and Pavlović, Vladimir B. and Filipović, Suzana",
year = "2022",
abstract = "The rise of innovation in the electrical industry is driven by the controlled design of new materials. The hybrid materials based on magnetite/nanocellulose are highly interesting due to their various applications in medicine, ecology, catalysis and electronics. In this study, the structure and morphology of nanocellulose/magnetite hybrid nanomaterials were investigated. The effect of nanocellulose loading on the crystal structure of synthesized composites was investigated by XRD and FTIR methods. The presented study reveals that the interaction between the cellulose and magnetic nanoparticles depends on the nanocellulose content. Further, a transition from cellulose II to cellulose I allomorph is observed. SEM and EDS are employed to determine the variation in morphology with changes in component concentrations. By the calculation of magnetic interactions between adjacent Fe3+ and Fe2+ ions within composites, it is determined that ferromagnetic coupling predominates.",
journal = "Polymers",
title = "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials",
pages = "1819",
volume = "14",
number = "9",
doi = "10.3390/polym14091819",
url = "https://hdl.handle.net/21.15107/rcub_dais_13152"
}
Janićijević, A., Pavlović, V. P., Kovačević, D., Perić, M., Vlahović, B., Pavlović, V. B.,& Filipović, S.. (2022). Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers, 14(9), 1819.
https://doi.org/10.3390/polym14091819
https://hdl.handle.net/21.15107/rcub_dais_13152
Janićijević A, Pavlović VP, Kovačević D, Perić M, Vlahović B, Pavlović VB, Filipović S. Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials. in Polymers. 2022;14(9):1819.
doi:10.3390/polym14091819
https://hdl.handle.net/21.15107/rcub_dais_13152 .
Janićijević, Aleksandra, Pavlović, Vera P., Kovačević, Danijela, Perić, Marko, Vlahović, Branislav, Pavlović, Vladimir B., Filipović, Suzana, "Structural Characterization of Nanocellulose/Fe3O4 Hybrid Nanomaterials" in Polymers, 14, no. 9 (2022):1819,
https://doi.org/10.3390/polym14091819 .,
https://hdl.handle.net/21.15107/rcub_dais_13152 .

TiO2 nanotubes film/FTO glass interface: Thermal treatment effects

Vujančević, Jelena; Bjelajac, Anđelika; Veltruska, Katerina; Matolin, Vladimir; Siketić, Zdravko; Provatas, Georgios; Jakšić, Milko; Stan, George; Socol, Gabriel; Mihailescu, Ion; Pavlović, Vladimir B.; Janaćkovic, Đorđe

(ETRAN, 2022)

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, Georgios
AU  - Jakšić, Milko
AU  - Stan, George
AU  - Socol, Gabriel
AU  - Mihailescu, Ion
AU  - Pavlović, Vladimir B.
AU  - Janaćkovic, Đorđe
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13160
AB  - Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.
PB  - ETRAN
T2  - Science of Sintering
T1  - TiO2 nanotubes film/FTO glass interface: Thermal treatment effects
SP  - 235
EP  - 248
VL  - 54
IS  - 2
DO  - 10.2298/SOS2202235V
UR  - https://hdl.handle.net/21.15107/rcub_dais_13160
ER  - 
@article{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, Georgios and Jakšić, Milko and Stan, George and Socol, Gabriel and Mihailescu, Ion and Pavlović, Vladimir B. and Janaćkovic, Đorđe",
year = "2022",
abstract = "Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.",
publisher = "ETRAN",
journal = "Science of Sintering",
title = "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects",
pages = "235-248",
volume = "54",
number = "2",
doi = "10.2298/SOS2202235V",
url = "https://hdl.handle.net/21.15107/rcub_dais_13160"
}
Vujančević, J., Bjelajac, A., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G., Socol, G., Mihailescu, I., Pavlović, V. B.,& Janaćkovic, Đ.. (2022). TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering
ETRAN., 54(2), 235-248.
https://doi.org/10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160
Vujančević J, Bjelajac A, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan G, Socol G, Mihailescu I, Pavlović VB, Janaćkovic Đ. TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering. 2022;54(2):235-248.
doi:10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160 .
Vujančević, Jelena, Bjelajac, Anđelika, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, Georgios, Jakšić, Milko, Stan, George, Socol, Gabriel, Mihailescu, Ion, Pavlović, Vladimir B., Janaćkovic, Đorđe, "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects" in Science of Sintering, 54, no. 2 (2022):235-248,
https://doi.org/10.2298/SOS2202235V .,
https://hdl.handle.net/21.15107/rcub_dais_13160 .

Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study

Bosnar, Sanja; Rac, Vladislav; Stošić, Dušan; Travert, Arnaud; Postole, Georgeta; Auroux, Aline; Škapin, Srečo Davor; Damjanović-Vasilić, Ljiljana S.; Bronić, Josip; Du, Xuesen; Marković, Smilja; Pavlović, Vladimir B.; Rakić, Vesna M.

(2021)

TY  - JOUR
AU  - Bosnar, Sanja
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Travert, Arnaud
AU  - Postole, Georgeta
AU  - Auroux, Aline
AU  - Škapin, Srečo Davor
AU  - Damjanović-Vasilić, Ljiljana S.
AU  - Bronić, Josip
AU  - Du, Xuesen
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
AU  - Rakić, Vesna M.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/13631
AB  - Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.
T2  - Microporous and Mesoporous Materials
T1  - Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study
SP  - 111534
VL  - 329
DO  - 10.1016/j.micromeso.2021.111534
UR  - https://hdl.handle.net/21.15107/rcub_dais_13631
ER  - 
@article{
author = "Bosnar, Sanja and Rac, Vladislav and Stošić, Dušan and Travert, Arnaud and Postole, Georgeta and Auroux, Aline and Škapin, Srečo Davor and Damjanović-Vasilić, Ljiljana S. and Bronić, Josip and Du, Xuesen and Marković, Smilja and Pavlović, Vladimir B. and Rakić, Vesna M.",
year = "2021",
abstract = "Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.",
journal = "Microporous and Mesoporous Materials",
title = "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study",
pages = "111534",
volume = "329",
doi = "10.1016/j.micromeso.2021.111534",
url = "https://hdl.handle.net/21.15107/rcub_dais_13631"
}
Bosnar, S., Rac, V., Stošić, D., Travert, A., Postole, G., Auroux, A., Škapin, S. D., Damjanović-Vasilić, L. S., Bronić, J., Du, X., Marković, S., Pavlović, V. B.,& Rakić, V. M.. (2021). Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials, 329, 111534.
https://doi.org/10.1016/j.micromeso.2021.111534
https://hdl.handle.net/21.15107/rcub_dais_13631
Bosnar S, Rac V, Stošić D, Travert A, Postole G, Auroux A, Škapin SD, Damjanović-Vasilić LS, Bronić J, Du X, Marković S, Pavlović VB, Rakić VM. Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials. 2021;329:111534.
doi:10.1016/j.micromeso.2021.111534
https://hdl.handle.net/21.15107/rcub_dais_13631 .
Bosnar, Sanja, Rac, Vladislav, Stošić, Dušan, Travert, Arnaud, Postole, Georgeta, Auroux, Aline, Škapin, Srečo Davor, Damjanović-Vasilić, Ljiljana S., Bronić, Josip, Du, Xuesen, Marković, Smilja, Pavlović, Vladimir B., Rakić, Vesna M., "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study" in Microporous and Mesoporous Materials, 329 (2021):111534,
https://doi.org/10.1016/j.micromeso.2021.111534 .,
https://hdl.handle.net/21.15107/rcub_dais_13631 .
7
1
4

Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder

Peleš Tadić, Adriana; Obradović, Nina; Kosanović, Darko; Petrović, J.; Blagojević, Vladimir A.; Đorđević, Antonije; Pavlović, Vladimir B.

(Belgrade : Serbian Ceramic Society, 2021)

TY  - CONF
AU  - Peleš Tadić, Adriana
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Petrović, J.
AU  - Blagojević, Vladimir A.
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11903
AB  - ZnO powder was mechanically activated for 10 and 30 minutes in a high energy planetary ball mill, and mixed with 2 wt% PVDF solution to obtain nanocomposite films (50 μm) by casting. ZnO powder activated for 10 and 30 minutes was used as filler. The difference in the dielectric properties for composites with the powder with prolonged time of mechanical activation was investigated, as well as the influence of ageing using dielectric measurements at higher frequencies. Dielectric measurement showed that the ageing process does not significantly affect the properties of the composites, while the prolonged activation times can be correlated with the changes in the values of the dielectric constant. The introduction of mechanically activated ZnO powders into the matrix leads to an increase in the dielectric permittivity of the polymer. Values of dielectric permittivity for different frequencies at 300 K decrease from approximately 3.1 (60 Hz) to 1.8 (30 MHz) for nanocomposite with ZnO activated for 10 minutes, while the permittivity for nanocopomosite with ZnO activated for 30 minutes permittivity was 2.6.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_dais_11903
ER  - 
@conference{
author = "Peleš Tadić, Adriana and Obradović, Nina and Kosanović, Darko and Petrović, J. and Blagojević, Vladimir A. and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2021",
abstract = "ZnO powder was mechanically activated for 10 and 30 minutes in a high energy planetary ball mill, and mixed with 2 wt% PVDF solution to obtain nanocomposite films (50 μm) by casting. ZnO powder activated for 10 and 30 minutes was used as filler. The difference in the dielectric properties for composites with the powder with prolonged time of mechanical activation was investigated, as well as the influence of ageing using dielectric measurements at higher frequencies. Dielectric measurement showed that the ageing process does not significantly affect the properties of the composites, while the prolonged activation times can be correlated with the changes in the values of the dielectric constant. The introduction of mechanically activated ZnO powders into the matrix leads to an increase in the dielectric permittivity of the polymer. Values of dielectric permittivity for different frequencies at 300 K decrease from approximately 3.1 (60 Hz) to 1.8 (30 MHz) for nanocomposite with ZnO activated for 10 minutes, while the permittivity for nanocopomosite with ZnO activated for 30 minutes permittivity was 2.6.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_dais_11903"
}
Peleš Tadić, A., Obradović, N., Kosanović, D., Petrović, J., Blagojević, V. A., Đorđević, A.,& Pavlović, V. B.. (2021). Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 57-57.
https://hdl.handle.net/21.15107/rcub_dais_11903
Peleš Tadić A, Obradović N, Kosanović D, Petrović J, Blagojević VA, Đorđević A, Pavlović VB. Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:57-57.
https://hdl.handle.net/21.15107/rcub_dais_11903 .
Peleš Tadić, Adriana, Obradović, Nina, Kosanović, Darko, Petrović, J., Blagojević, Vladimir A., Đorđević, Antonije, Pavlović, Vladimir B., "Dielectric characteristics of polymer nanocomposites based on PVDF and mechanically activated ZnO powder" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):57-57,
https://hdl.handle.net/21.15107/rcub_dais_11903 .

Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software

Obradović, Nina; Peleš, Adriana; Olćan, Dragan; Fahrenholtz, William G.; Đorđević, Antonije; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2021)

TY  - CONF
AU  - Obradović, Nina
AU  - Peleš, Adriana
AU  - Olćan, Dragan
AU  - Fahrenholtz, William G.
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12351
AB  - Our research group has developed a method for measurement of complex relative permittivity of various dielectric materials in the frequency range from around 1 kHz up to several GHz. Material samples have preferably a disk shape. The thicknesses of the samples can be in a wide range, from about 10 μm (thick films) up to several mm. We have designed and manufactured a set of coaxial chambers, which we use as test fixtures. We have also developed two numerical-simulation programs for the electromagnetic analysis of bodies with rotational symmetry. One program is suitable for the low-frequency analysis. It is based on an electrostatic approach. The other program is based on an electrodynamic approach and it is tailored for microwave frequencies. In measurements, we use impedance meters and network analyzers to obtain the input impedance of a chamber with a sample. Thereafter, we implement our software for the electromagnetic modeling to extract the relative permittivity of the measured sample. As examples of verification of our method, we present here results for the relative permittivities of two sets of samples whose sizes are on the extreme limits of the method. The first set comprises poly (vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films, whose relative permittivities are around 1.8. The second set comprises large, high-density samples of spinel (aluminum magnesium oxide) ceramics, sintered under various conditions. The measured relative permittivities of these samples are around 7.5. In all cases, good agreement with other available data has been obtained.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software
SP  - 82
EP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_dais_12351
ER  - 
@conference{
author = "Obradović, Nina and Peleš, Adriana and Olćan, Dragan and Fahrenholtz, William G. and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2021",
abstract = "Our research group has developed a method for measurement of complex relative permittivity of various dielectric materials in the frequency range from around 1 kHz up to several GHz. Material samples have preferably a disk shape. The thicknesses of the samples can be in a wide range, from about 10 μm (thick films) up to several mm. We have designed and manufactured a set of coaxial chambers, which we use as test fixtures. We have also developed two numerical-simulation programs for the electromagnetic analysis of bodies with rotational symmetry. One program is suitable for the low-frequency analysis. It is based on an electrostatic approach. The other program is based on an electrodynamic approach and it is tailored for microwave frequencies. In measurements, we use impedance meters and network analyzers to obtain the input impedance of a chamber with a sample. Thereafter, we implement our software for the electromagnetic modeling to extract the relative permittivity of the measured sample. As examples of verification of our method, we present here results for the relative permittivities of two sets of samples whose sizes are on the extreme limits of the method. The first set comprises poly (vinylidene fluoride) and mechanically activated ZnO nanoparticle composite films, whose relative permittivities are around 1.8. The second set comprises large, high-density samples of spinel (aluminum magnesium oxide) ceramics, sintered under various conditions. The measured relative permittivities of these samples are around 7.5. In all cases, good agreement with other available data has been obtained.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software",
pages = "82-82",
url = "https://hdl.handle.net/21.15107/rcub_dais_12351"
}
Obradović, N., Peleš, A., Olćan, D., Fahrenholtz, W. G., Đorđević, A.,& Pavlović, V. B.. (2021). Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 82-82.
https://hdl.handle.net/21.15107/rcub_dais_12351
Obradović N, Peleš A, Olćan D, Fahrenholtz WG, Đorđević A, Pavlović VB. Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:82-82.
https://hdl.handle.net/21.15107/rcub_dais_12351 .
Obradović, Nina, Peleš, Adriana, Olćan, Dragan, Fahrenholtz, William G., Đorđević, Antonije, Pavlović, Vladimir B., "Measurement of dielectric permitivity using coaxial chambers and electromagnetic-modeling software" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):82-82,
https://hdl.handle.net/21.15107/rcub_dais_12351 .

Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4

Janićijević, Aleksandra; Sknepnek, Aleksandra; Mirković, Miljana; Pavlović, Vladimir; Filipović, Suzana

(Beograd : Savez inženjera i tehničara Srbije, 2021)

TY  - JOUR
AU  - Janićijević, Aleksandra
AU  - Sknepnek, Aleksandra
AU  - Mirković, Miljana
AU  - Pavlović, Vladimir
AU  - Filipović, Suzana
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12342
AB  - Napredak u mnogim oblastima tehnike i tehnologije je blisko povezan sa razvojem novih ili unapređenjem postojećih materijala. Imajući u vidu široku primenu bakterijske nanoceluloze (BNC) u raznim oblastima svakodnevnog života, od biomedicine, ekologije do elektronike, kompoziti na bazi BNC su sve rasprostranjeniji i privlače pažnju naučne zajednice. Posebno je značajno detaljno ispitati parametre sinteze koji utiču na promene u kristalnoj strukturi i morfologiji dobijenih kompozita, imajući u vidu da ove promene imaju značajan uticaj na krajnja funkcionalna svojstva. U ovom radu je proučavan kompozitni materijal zasnovan na bakterijskoj nanocelulozi BNC (kao početnoj komponenti) i feromagnetnom Fe3O4. BNC je dobijena aktivnošću bakterija sirćetnog vrenja nakon 7 dana rasta u odgovarajućem medijuma. Istraživanje je usmereno na optimizaciju uslova precipitacije Fe3O4, koji se odnose na promenu intervala stajanja BNC filmova u rastvoru soli gvožđa. Uticaj različitih uslova sinteze je analiziran metodama SEM-EDS, FTIR i XRD.
AB  - Development in many areas of engineering and technology are closely linked to the development of new or improvement of existing materials. Having in mind wide use of bacterial nanocellulose (BNC) in various areas of everyday life, from biomedicine, ecology to electronics, BNC-based composites are becoming widely used and attracting the attention of the scientific community. It is especially important to examine in detail the synthesis parameters that affect the changes in the crystal structure and morphology of the obtained composites, having in mind that these changes have a crucial influence on their final functional properties. In this paper, a composite material based on bacterial nanocellulose BNC (as the matrix) and ferromagnetic Fe3O4 was studied. BNC was obtained by the activity of acetic fermentation bacteria after 7 days of growth in a suitable medium. The research is aimed to optimization of the Fe3O4 precipitation conditions. It's especially considering the time interval of BNC films spend in the iron salt solution. The influence of the performed synthesis conditions was considered by the SEMEDS, FTIR and XRD methods.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4
SP  - 273
EP  - 278
VL  - 76
IS  - 3
DO  - 10.5937/tehnika2103273J
UR  - https://hdl.handle.net/21.15107/rcub_dais_12342
ER  - 
@article{
author = "Janićijević, Aleksandra and Sknepnek, Aleksandra and Mirković, Miljana and Pavlović, Vladimir and Filipović, Suzana",
year = "2021",
abstract = "Napredak u mnogim oblastima tehnike i tehnologije je blisko povezan sa razvojem novih ili unapređenjem postojećih materijala. Imajući u vidu široku primenu bakterijske nanoceluloze (BNC) u raznim oblastima svakodnevnog života, od biomedicine, ekologije do elektronike, kompoziti na bazi BNC su sve rasprostranjeniji i privlače pažnju naučne zajednice. Posebno je značajno detaljno ispitati parametre sinteze koji utiču na promene u kristalnoj strukturi i morfologiji dobijenih kompozita, imajući u vidu da ove promene imaju značajan uticaj na krajnja funkcionalna svojstva. U ovom radu je proučavan kompozitni materijal zasnovan na bakterijskoj nanocelulozi BNC (kao početnoj komponenti) i feromagnetnom Fe3O4. BNC je dobijena aktivnošću bakterija sirćetnog vrenja nakon 7 dana rasta u odgovarajućem medijuma. Istraživanje je usmereno na optimizaciju uslova precipitacije Fe3O4, koji se odnose na promenu intervala stajanja BNC filmova u rastvoru soli gvožđa. Uticaj različitih uslova sinteze je analiziran metodama SEM-EDS, FTIR i XRD., Development in many areas of engineering and technology are closely linked to the development of new or improvement of existing materials. Having in mind wide use of bacterial nanocellulose (BNC) in various areas of everyday life, from biomedicine, ecology to electronics, BNC-based composites are becoming widely used and attracting the attention of the scientific community. It is especially important to examine in detail the synthesis parameters that affect the changes in the crystal structure and morphology of the obtained composites, having in mind that these changes have a crucial influence on their final functional properties. In this paper, a composite material based on bacterial nanocellulose BNC (as the matrix) and ferromagnetic Fe3O4 was studied. BNC was obtained by the activity of acetic fermentation bacteria after 7 days of growth in a suitable medium. The research is aimed to optimization of the Fe3O4 precipitation conditions. It's especially considering the time interval of BNC films spend in the iron salt solution. The influence of the performed synthesis conditions was considered by the SEMEDS, FTIR and XRD methods.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4",
pages = "273-278",
volume = "76",
number = "3",
doi = "10.5937/tehnika2103273J",
url = "https://hdl.handle.net/21.15107/rcub_dais_12342"
}
Janićijević, A., Sknepnek, A., Mirković, M., Pavlović, V.,& Filipović, S.. (2021). Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 76(3), 273-278.
https://doi.org/10.5937/tehnika2103273J
https://hdl.handle.net/21.15107/rcub_dais_12342
Janićijević A, Sknepnek A, Mirković M, Pavlović V, Filipović S. Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4. in Tehnika. 2021;76(3):273-278.
doi:10.5937/tehnika2103273J
https://hdl.handle.net/21.15107/rcub_dais_12342 .
Janićijević, Aleksandra, Sknepnek, Aleksandra, Mirković, Miljana, Pavlović, Vladimir, Filipović, Suzana, "Optimizacija parametara sinteze nanokompozita na bazi bakterijske nanoceluloze/Fe3O4" in Tehnika, 76, no. 3 (2021):273-278,
https://doi.org/10.5937/tehnika2103273J .,
https://hdl.handle.net/21.15107/rcub_dais_12342 .

Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route

Mirković, Miljana; Filipović, Suzana; Masković, Pavle; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2021)

TY  - CONF
AU  - Mirković, Miljana
AU  - Filipović, Suzana
AU  - Masković, Pavle
AU  - Pavlović, Vladimir B.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12346
AB  - Due to the growing number of people infected with the new corona virus in the world, there is an increase in bacterial infections, which weakens the immunity. New knowledge about simple and low cost synthesis methods of materials with good structural and antimicrobial properties are of great importance nowadays. Combination of bio ceramic Hydroxyapatite material with good biocompatible characteristics and Titanium dioxide material with good degradation properties of organic molecules when combine together has ability to absorb and decompose the bacteria. Hydroxyapatite/titanium dioxide nanomaterials have been prepared by tree different synthesis route. The morphology and semi quantitative chemical analysis were characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). Phase and structural characterization of obtained materials were determined using X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials were evaluated in the average range from 8 nm to 15 nm. Due to phase analysis by XRD characterization the peak shows presence of anatase phase with hydroxyapatite. Based on XRD peaks positions the hexagonal hydroxyapatite phases are formed in every synthesis route with TiO2 anatase phase. The microstructural studies confirmed that the nanosized HAp coated in a different way with TiO2 depending on a synthesis route. EDX analysis confirmed presence of Ti, Ca, P, O in obtained materials. The IR spectroscopy confirmed vibrational bands characteristic for HAp and titanium with anatase phase. The investigated materials show satisfactory antimicrobial properties.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route
SP  - 14
EP  - 14
UR  - https://hdl.handle.net/21.15107/rcub_dais_12346
ER  - 
@conference{
author = "Mirković, Miljana and Filipović, Suzana and Masković, Pavle and Pavlović, Vladimir B.",
year = "2021",
abstract = "Due to the growing number of people infected with the new corona virus in the world, there is an increase in bacterial infections, which weakens the immunity. New knowledge about simple and low cost synthesis methods of materials with good structural and antimicrobial properties are of great importance nowadays. Combination of bio ceramic Hydroxyapatite material with good biocompatible characteristics and Titanium dioxide material with good degradation properties of organic molecules when combine together has ability to absorb and decompose the bacteria. Hydroxyapatite/titanium dioxide nanomaterials have been prepared by tree different synthesis route. The morphology and semi quantitative chemical analysis were characterized by scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX). Phase and structural characterization of obtained materials were determined using X-ray powder diffraction method (XRD). The crystallite sizes of the obtained materials were evaluated in the average range from 8 nm to 15 nm. Due to phase analysis by XRD characterization the peak shows presence of anatase phase with hydroxyapatite. Based on XRD peaks positions the hexagonal hydroxyapatite phases are formed in every synthesis route with TiO2 anatase phase. The microstructural studies confirmed that the nanosized HAp coated in a different way with TiO2 depending on a synthesis route. EDX analysis confirmed presence of Ti, Ca, P, O in obtained materials. The IR spectroscopy confirmed vibrational bands characteristic for HAp and titanium with anatase phase. The investigated materials show satisfactory antimicrobial properties.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route",
pages = "14-14",
url = "https://hdl.handle.net/21.15107/rcub_dais_12346"
}
Mirković, M., Filipović, S., Masković, P.,& Pavlović, V. B.. (2021). Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 14-14.
https://hdl.handle.net/21.15107/rcub_dais_12346
Mirković M, Filipović S, Masković P, Pavlović VB. Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:14-14.
https://hdl.handle.net/21.15107/rcub_dais_12346 .
Mirković, Miljana, Filipović, Suzana, Masković, Pavle, Pavlović, Vladimir B., "Phase morphological and antimicrobial properties of HAp-TiO2 nanomaterials obtained by different synthesis route" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):14-14,
https://hdl.handle.net/21.15107/rcub_dais_12346 .

Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes

Vujančević, Jelena; Ćirković, Jovana; Horváth, Endre; Forró, László; Pavlović, Vladimir B.; Janaćković, Đorđe

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2021)

TY  - CONF
AU  - Vujančević, Jelena
AU  - Ćirković, Jovana
AU  - Horváth, Endre
AU  - Forró, László
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12347
AB  - TiO2 under UV light generates charge carriers (electrons and holes) that take part in the process of decomposition of pollutants, which is a well-known fact for the past few decades. For this reason, TiO2 is used for photocatalytic purification water and air. Photoactivity of TiO2 depends on the amount of generated charge carriers, and one part of those carriers are lost through the process of recombination. In order to improve photoactivity, it is necessary to speed up transport of electrons and holes. For better and faster charge carrier transport a unidirectional path is desired, which can be obtained by synthesizing 1D morphology. Anodization of titanium foil is a good way to obtain perpendicular nanotubular morphology onto a substrate. Nanotubular morphology can be optimized via operative conditions of anodization: applied voltage, anodization time and type of electrolyte. In this work, TiO2 nanotube arrays were synthesized by anodization of titanium foil at different voltages: 10 V, 15 V, 20 V and 25 V. Based on FESEM (Field Emission Scanning Electron Microscopy) micrographs, the microstructure of nanotubes was analysed and data concerning wall thickness, outer diameter of nanotubes and active surface were considered. Also, the influence of nanotube morphology on optical properties was determined. Results of our research show that the increasement in anodization voltage influenced on the appearance of redshift in the absorption spectrum. The sample synthesized at 20 V showed the highest photocatalytic activity due to the optimal nanotube length and nanotube diameter.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes
SP  - 23
EP  - 23
UR  - https://hdl.handle.net/21.15107/rcub_dais_12347
ER  - 
@conference{
author = "Vujančević, Jelena and Ćirković, Jovana and Horváth, Endre and Forró, László and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2021",
abstract = "TiO2 under UV light generates charge carriers (electrons and holes) that take part in the process of decomposition of pollutants, which is a well-known fact for the past few decades. For this reason, TiO2 is used for photocatalytic purification water and air. Photoactivity of TiO2 depends on the amount of generated charge carriers, and one part of those carriers are lost through the process of recombination. In order to improve photoactivity, it is necessary to speed up transport of electrons and holes. For better and faster charge carrier transport a unidirectional path is desired, which can be obtained by synthesizing 1D morphology. Anodization of titanium foil is a good way to obtain perpendicular nanotubular morphology onto a substrate. Nanotubular morphology can be optimized via operative conditions of anodization: applied voltage, anodization time and type of electrolyte. In this work, TiO2 nanotube arrays were synthesized by anodization of titanium foil at different voltages: 10 V, 15 V, 20 V and 25 V. Based on FESEM (Field Emission Scanning Electron Microscopy) micrographs, the microstructure of nanotubes was analysed and data concerning wall thickness, outer diameter of nanotubes and active surface were considered. Also, the influence of nanotube morphology on optical properties was determined. Results of our research show that the increasement in anodization voltage influenced on the appearance of redshift in the absorption spectrum. The sample synthesized at 20 V showed the highest photocatalytic activity due to the optimal nanotube length and nanotube diameter.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes",
pages = "23-23",
url = "https://hdl.handle.net/21.15107/rcub_dais_12347"
}
Vujančević, J., Ćirković, J., Horváth, E., Forró, L., Pavlović, V. B.,& Janaćković, Đ.. (2021). Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 23-23.
https://hdl.handle.net/21.15107/rcub_dais_12347
Vujančević J, Ćirković J, Horváth E, Forró L, Pavlović VB, Janaćković Đ. Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:23-23.
https://hdl.handle.net/21.15107/rcub_dais_12347 .
Vujančević, Jelena, Ćirković, Jovana, Horváth, Endre, Forró, László, Pavlović, Vladimir B., Janaćković, Đorđe, "Influence of anodization voltage on photocatalztic activity of TiO2 nanotubes" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):23-23,
https://hdl.handle.net/21.15107/rcub_dais_12347 .

Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose

Sknepnek, Aleksandra; Filipović, Suzana; Masković, Pavle; Mirković, Miljana; Miletić, Dunja; Nikšić, Miomir; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2021)

TY  - CONF
AU  - Sknepnek, Aleksandra
AU  - Filipović, Suzana
AU  - Masković, Pavle
AU  - Mirković, Miljana
AU  - Miletić, Dunja
AU  - Nikšić, Miomir
AU  - Pavlović, Vladimir B.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12348
AB  - Cellulose, as the main constituent of plants, is the most common natural material that is widely used. Bacterial cellulose (BC) is a polymer of β-1,4-glucan chains, extracellularly attached to bacterial cells. It possesses the same structure as plant cellulose but its application has many advantages. BC has tinner threads, better crystallinity, mechanical strength and higher purity. By the means of micro- and nano-pores in the structure, it is possible to retain nano particles and enhance the application of obtained nanostructures. BC lacks antibacterial and antioxidative activity, conductivity and magnetic properties, which lowers the possibility of its application in biomedicine and electronics. To overcome previously mentioned deficiency, it is possible to apply bioactive polymers, nanomaterials or solid particles into the structure. High biocidal potential of TiO2 originates from its photocatalytic properties, and the generation of reactive oxygen species (ROS). At the first site of action, they cause cell membrane damage and afterwards, they attack intracellular components causing cell death. Hydroxyapatite (HAp) is capable to act synergistically with TiO2 and to accelerate its efficiency. Having in mind all characteristics of previously mentioned components, we have investigated the structure, morphology, mechanical properties and antimicrobial activity of advanced ceramics/polymer films. The influence of synthesis duration on BC structure, produced by Komagataeibacter xylinus species, was investigated. Thereafter, the possibility of TiO2/HAp ceramic nanocomposite application in BC was examined. The developed structures were analyzed by SEM and EDS analyzes, as well as XRD and FTIR spectroscopy. Mechanical properties were investigated as well.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose
SP  - 78
EP  - 78
UR  - https://hdl.handle.net/21.15107/rcub_dais_12348
ER  - 
@conference{
author = "Sknepnek, Aleksandra and Filipović, Suzana and Masković, Pavle and Mirković, Miljana and Miletić, Dunja and Nikšić, Miomir and Pavlović, Vladimir B.",
year = "2021",
abstract = "Cellulose, as the main constituent of plants, is the most common natural material that is widely used. Bacterial cellulose (BC) is a polymer of β-1,4-glucan chains, extracellularly attached to bacterial cells. It possesses the same structure as plant cellulose but its application has many advantages. BC has tinner threads, better crystallinity, mechanical strength and higher purity. By the means of micro- and nano-pores in the structure, it is possible to retain nano particles and enhance the application of obtained nanostructures. BC lacks antibacterial and antioxidative activity, conductivity and magnetic properties, which lowers the possibility of its application in biomedicine and electronics. To overcome previously mentioned deficiency, it is possible to apply bioactive polymers, nanomaterials or solid particles into the structure. High biocidal potential of TiO2 originates from its photocatalytic properties, and the generation of reactive oxygen species (ROS). At the first site of action, they cause cell membrane damage and afterwards, they attack intracellular components causing cell death. Hydroxyapatite (HAp) is capable to act synergistically with TiO2 and to accelerate its efficiency. Having in mind all characteristics of previously mentioned components, we have investigated the structure, morphology, mechanical properties and antimicrobial activity of advanced ceramics/polymer films. The influence of synthesis duration on BC structure, produced by Komagataeibacter xylinus species, was investigated. Thereafter, the possibility of TiO2/HAp ceramic nanocomposite application in BC was examined. The developed structures were analyzed by SEM and EDS analyzes, as well as XRD and FTIR spectroscopy. Mechanical properties were investigated as well.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose",
pages = "78-78",
url = "https://hdl.handle.net/21.15107/rcub_dais_12348"
}
Sknepnek, A., Filipović, S., Masković, P., Mirković, M., Miletić, D., Nikšić, M.,& Pavlović, V. B.. (2021). Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 78-78.
https://hdl.handle.net/21.15107/rcub_dais_12348
Sknepnek A, Filipović S, Masković P, Mirković M, Miletić D, Nikšić M, Pavlović VB. Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:78-78.
https://hdl.handle.net/21.15107/rcub_dais_12348 .
Sknepnek, Aleksandra, Filipović, Suzana, Masković, Pavle, Mirković, Miljana, Miletić, Dunja, Nikšić, Miomir, Pavlović, Vladimir B., "Effects of synthesis parameters on structure and properties of the ceramic/polymer films based on bacterial cellulose" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):78-78,
https://hdl.handle.net/21.15107/rcub_dais_12348 .

The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics

Živojinović, Jelena; Blagojević, Vladimir A.; Pavlović, Vera P.; Kosanović, Darko; Tadić, Nenad B.; Pavlović, Vladimir B.

(Belgrade : Innovation Center of Faculty of Mechanical Engineering, 2021)

TY  - CONF
AU  - Živojinović, Jelena
AU  - Blagojević, Vladimir A.
AU  - Pavlović, Vera P.
AU  - Kosanović, Darko
AU  - Tadić, Nenad B.
AU  - Pavlović, Vladimir B.
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12349
AB  - In recent years, a lot of interest has been shown in obtaining materials with predetermined properties. The aim is to establish a functional dependence between the synthesis parameters, structural characteristics, and properties of the material. Ceramic materials based on strontium titanate (SrTiO3) are of special interest due to their unique physical-chemical properties. Having in mind the importance of examining the influence of synthesis parameters on the process of obtaining and properties of functional electroceramic materials, and the importance of SrTiO3 as a perovskite material, the motive was to analyze and consider the influence of mechanical activation. It has been established that the time of mechanical activation (0, 10, 30, 60, 90, and 120 minutes) of SrTiO3 powders indirectly affects on electrical properties of SrTiO3 ceramics. It was noticed that in SrTiO3 ceramics the values of relative dielectric permittivity in the radio frequency range (0,3 MHz-3 GHz) are stable, which is important for the fabrication of electronic components. Microstructural SEM analysis showed that the increase in mechanical activation time results in less porous samples. It was found that the value of the relative dielectric permittivity of ceramic samples at room temperature changes following the combined effect of changes in sample density, grain size, as well as changes in the grain boundary region. The maximum value of dielectric permittivity was observed in the sample activated for 10 minutes. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics
SP  - 80
EP  - 80
UR  - https://hdl.handle.net/21.15107/rcub_dais_12349
ER  - 
@conference{
author = "Živojinović, Jelena and Blagojević, Vladimir A. and Pavlović, Vera P. and Kosanović, Darko and Tadić, Nenad B. and Pavlović, Vladimir B.",
year = "2021",
abstract = "In recent years, a lot of interest has been shown in obtaining materials with predetermined properties. The aim is to establish a functional dependence between the synthesis parameters, structural characteristics, and properties of the material. Ceramic materials based on strontium titanate (SrTiO3) are of special interest due to their unique physical-chemical properties. Having in mind the importance of examining the influence of synthesis parameters on the process of obtaining and properties of functional electroceramic materials, and the importance of SrTiO3 as a perovskite material, the motive was to analyze and consider the influence of mechanical activation. It has been established that the time of mechanical activation (0, 10, 30, 60, 90, and 120 minutes) of SrTiO3 powders indirectly affects on electrical properties of SrTiO3 ceramics. It was noticed that in SrTiO3 ceramics the values of relative dielectric permittivity in the radio frequency range (0,3 MHz-3 GHz) are stable, which is important for the fabrication of electronic components. Microstructural SEM analysis showed that the increase in mechanical activation time results in less porous samples. It was found that the value of the relative dielectric permittivity of ceramic samples at room temperature changes following the combined effect of changes in sample density, grain size, as well as changes in the grain boundary region. The maximum value of dielectric permittivity was observed in the sample activated for 10 minutes. Also, the sample activated for 10 min exhibits relatively low values of loss tangent, compared to the other mechanically activated samples, providing the best overall dielectric performance compared to other samples.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics",
pages = "80-80",
url = "https://hdl.handle.net/21.15107/rcub_dais_12349"
}
Živojinović, J., Blagojević, V. A., Pavlović, V. P., Kosanović, D., Tadić, N. B.,& Pavlović, V. B.. (2021). The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 80-80.
https://hdl.handle.net/21.15107/rcub_dais_12349
Živojinović J, Blagojević VA, Pavlović VP, Kosanović D, Tadić NB, Pavlović VB. The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:80-80.
https://hdl.handle.net/21.15107/rcub_dais_12349 .
Živojinović, Jelena, Blagojević, Vladimir A., Pavlović, Vera P., Kosanović, Darko, Tadić, Nenad B., Pavlović, Vladimir B., "The influence of mechanical activation on microstructure and dielectric properties of SrTiO3 ceramics" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):80-80,
https://hdl.handle.net/21.15107/rcub_dais_12349 .

Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja

Janićijević, Aleksandra; Filipović, Suzana; Pavlović, Vladimir B.; Sknepnek, Aleksandra; Kovačević, Danijela; Đorđević, Nenad; Mirković, Miljana; Živković, Predrag

(Čačak : Univerzitet u Kragujevcu, Agronomski fakultet, 2021)

TY  - CONF
AU  - Janićijević, Aleksandra
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir B.
AU  - Sknepnek, Aleksandra
AU  - Kovačević, Danijela
AU  - Đorđević, Nenad
AU  - Mirković, Miljana
AU  - Živković, Predrag
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12356
AB  - Kao jedan od najzastupljenijih biopolimera na Zemlji, celuloza je našla primenu u prehrambenoj industriji, biomedicini i biotehnologiji. Dobijanje celuloznih vlakana iz biljaka je praćeno prisustvom nusproizvoda, čije je uklanjanje zahtevan proces. Stoga, materijali na bazi bakterijske nanoceluloze (BCN), nalaze sve širu primenu u svakodnevnici. Imajući u vidu prednosti BCN, u ovom radu su ispitivane promene u strukturi i morfologiji BCN u funkciji parametara sinteze. Analiziran je uticaj vrste i zapremine medijuma, kao i dužine prečišćavanja u NaOH, na promene u prinosu i strukturi BCN. Navedene promene su ispitivane metodama XRD, FTIR, kao i primenom SEM i EDS analize.
AB  - As one of the most common biopolymers on Earth, cellulose has found an important role in food industry, biomedicine andbiotechnology. The process of obtaining cellulose fibers is often followed with the presence of the byproduct, whose removal is required procedure. From that reason, the process of obtaining material on a bacterial cellulose (BC) basis,finds wide application in everyday life. Having in mind her many features, we have investigated the change in structure and morphology of BC depending on the synthesis parameters. The influence of the medium volume and different time intervals of NaOH treatment relative to different BCN yields and structure. The mentioned changes were examined by XRD, FTIR spectroscopy, as well as SEM and EDS analyzes.
PB  - Čačak : Univerzitet u Kragujevcu, Agronomski fakultet
C3  - Zbornik radova [Elektronski izvor] / XXVI savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 12 - 13. mart 2021. godine
T1  - Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja
SP  - 281
EP  - 289
DO  - 10.46793/SBT26.281J
UR  - https://hdl.handle.net/21.15107/rcub_dais_12356
ER  - 
@conference{
author = "Janićijević, Aleksandra and Filipović, Suzana and Pavlović, Vladimir B. and Sknepnek, Aleksandra and Kovačević, Danijela and Đorđević, Nenad and Mirković, Miljana and Živković, Predrag",
year = "2021",
abstract = "Kao jedan od najzastupljenijih biopolimera na Zemlji, celuloza je našla primenu u prehrambenoj industriji, biomedicini i biotehnologiji. Dobijanje celuloznih vlakana iz biljaka je praćeno prisustvom nusproizvoda, čije je uklanjanje zahtevan proces. Stoga, materijali na bazi bakterijske nanoceluloze (BCN), nalaze sve širu primenu u svakodnevnici. Imajući u vidu prednosti BCN, u ovom radu su ispitivane promene u strukturi i morfologiji BCN u funkciji parametara sinteze. Analiziran je uticaj vrste i zapremine medijuma, kao i dužine prečišćavanja u NaOH, na promene u prinosu i strukturi BCN. Navedene promene su ispitivane metodama XRD, FTIR, kao i primenom SEM i EDS analize., As one of the most common biopolymers on Earth, cellulose has found an important role in food industry, biomedicine andbiotechnology. The process of obtaining cellulose fibers is often followed with the presence of the byproduct, whose removal is required procedure. From that reason, the process of obtaining material on a bacterial cellulose (BC) basis,finds wide application in everyday life. Having in mind her many features, we have investigated the change in structure and morphology of BC depending on the synthesis parameters. The influence of the medium volume and different time intervals of NaOH treatment relative to different BCN yields and structure. The mentioned changes were examined by XRD, FTIR spectroscopy, as well as SEM and EDS analyzes.",
publisher = "Čačak : Univerzitet u Kragujevcu, Agronomski fakultet",
journal = "Zbornik radova [Elektronski izvor] / XXVI savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 12 - 13. mart 2021. godine",
title = "Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja",
pages = "281-289",
doi = "10.46793/SBT26.281J",
url = "https://hdl.handle.net/21.15107/rcub_dais_12356"
}
Janićijević, A., Filipović, S., Pavlović, V. B., Sknepnek, A., Kovačević, D., Đorđević, N., Mirković, M.,& Živković, P.. (2021). Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja. in Zbornik radova [Elektronski izvor] / XXVI savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 12 - 13. mart 2021. godine
Čačak : Univerzitet u Kragujevcu, Agronomski fakultet., 281-289.
https://doi.org/10.46793/SBT26.281J
https://hdl.handle.net/21.15107/rcub_dais_12356
Janićijević A, Filipović S, Pavlović VB, Sknepnek A, Kovačević D, Đorđević N, Mirković M, Živković P. Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja. in Zbornik radova [Elektronski izvor] / XXVI savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 12 - 13. mart 2021. godine. 2021;:281-289.
doi:10.46793/SBT26.281J
https://hdl.handle.net/21.15107/rcub_dais_12356 .
Janićijević, Aleksandra, Filipović, Suzana, Pavlović, Vladimir B., Sknepnek, Aleksandra, Kovačević, Danijela, Đorđević, Nenad, Mirković, Miljana, Živković, Predrag, "Sinteza i struktura bakterijske celuloze primenom bakterija sirćetnog vrenja" in Zbornik radova [Elektronski izvor] / XXVI savetovanje o biotehnologiji sa međunarodnim učešćem, Čačak, 12 - 13. mart 2021. godine (2021):281-289,
https://doi.org/10.46793/SBT26.281J .,
https://hdl.handle.net/21.15107/rcub_dais_12356 .
1

Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite

Janićijević, Aleksandra; Pavlović, Vladimir B.; Sknepnek, A.; Mirković, M.; Kovačević, D.; Đorđević, Nataša; Filipović, Suzana

(Belgrade : Serbian Ceramic Society, 2021)

TY  - CONF
AU  - Janićijević, Aleksandra
AU  - Pavlović, Vladimir B.
AU  - Sknepnek, A.
AU  - Mirković, M.
AU  - Kovačević, D.
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11905
AB  - Cellulose is a biopolymer with a wide range of properties like biocompatibility, hydrophilicity, porosity, good mechanical properties, biodegradability and non-toxicity. The properties and application of cellulose based materials are related to the source of the cellulose production. Despite the fact that the plant cellulose is playing a leading role in obtaining cellulose fibers, it has been found that ecologically and economically, a better source for obtaining cellulose is by fermenting a particular strain of bacteria. Although bacterial nano cellulose (BCN) based materials can be used in numerous industries, from the paper and food industries to biomedicine, their application in electronics is limited because bacterial cellulose does not have conductive and ferromagnetic properties. Having this in mind in this research, the results of the development of nanocomposite materials based on BCN modified with Fe3O4 has been presented. The differences in the interaction of Fe3O4 nanoparticles and BCN obtained by varying precipitation parameters were investigated and the effect of reaction time was followed by SEM-EDS, XRD, and FTIR analysis. It has been found that this type of modifications of the initial BCN, enables development of new composite materials with superior properties, which can be used in various fields of electronics.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite
SP  - 55
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_dais_11905
ER  - 
@conference{
author = "Janićijević, Aleksandra and Pavlović, Vladimir B. and Sknepnek, A. and Mirković, M. and Kovačević, D. and Đorđević, Nataša and Filipović, Suzana",
year = "2021",
abstract = "Cellulose is a biopolymer with a wide range of properties like biocompatibility, hydrophilicity, porosity, good mechanical properties, biodegradability and non-toxicity. The properties and application of cellulose based materials are related to the source of the cellulose production. Despite the fact that the plant cellulose is playing a leading role in obtaining cellulose fibers, it has been found that ecologically and economically, a better source for obtaining cellulose is by fermenting a particular strain of bacteria. Although bacterial nano cellulose (BCN) based materials can be used in numerous industries, from the paper and food industries to biomedicine, their application in electronics is limited because bacterial cellulose does not have conductive and ferromagnetic properties. Having this in mind in this research, the results of the development of nanocomposite materials based on BCN modified with Fe3O4 has been presented. The differences in the interaction of Fe3O4 nanoparticles and BCN obtained by varying precipitation parameters were investigated and the effect of reaction time was followed by SEM-EDS, XRD, and FTIR analysis. It has been found that this type of modifications of the initial BCN, enables development of new composite materials with superior properties, which can be used in various fields of electronics.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite",
pages = "55-56",
url = "https://hdl.handle.net/21.15107/rcub_dais_11905"
}
Janićijević, A., Pavlović, V. B., Sknepnek, A., Mirković, M., Kovačević, D., Đorđević, N.,& Filipović, S.. (2021). Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 55-56.
https://hdl.handle.net/21.15107/rcub_dais_11905
Janićijević A, Pavlović VB, Sknepnek A, Mirković M, Kovačević D, Đorđević N, Filipović S. Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:55-56.
https://hdl.handle.net/21.15107/rcub_dais_11905 .
Janićijević, Aleksandra, Pavlović, Vladimir B., Sknepnek, A., Mirković, M., Kovačević, D., Đorđević, Nataša, Filipović, Suzana, "Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):55-56,
https://hdl.handle.net/21.15107/rcub_dais_11905 .

PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix

Pavlović, Vera P.; Tošić, Dragana; Dojčilović, Radovan; Dudić, Duško; Dramićanin, Miroslav D.; Medić, Mina; McPherson, Michael M.; Pavlović, Vladimir B.; Vlahović, Branislav; Đoković, Vladimir

(Elsevier BV, 2021)

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Tošić, Dragana
AU  - Dojčilović, Radovan
AU  - Dudić, Duško
AU  - Dramićanin, Miroslav D.
AU  - Medić, Mina
AU  - McPherson, Michael M.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/10535
AB  - Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz.
PB  - Elsevier BV
T2  - Polymer Testing
T1  - PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix
SP  - 107093
VL  - 96
DO  - 10.1016/j.polymertesting.2021.107093
UR  - https://hdl.handle.net/21.15107/rcub_dais_10535
ER  - 
@article{
author = "Pavlović, Vera P. and Tošić, Dragana and Dojčilović, Radovan and Dudić, Duško and Dramićanin, Miroslav D. and Medić, Mina and McPherson, Michael M. and Pavlović, Vladimir B. and Vlahović, Branislav and Đoković, Vladimir",
year = "2021",
abstract = "Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz.",
publisher = "Elsevier BV",
journal = "Polymer Testing",
title = "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix",
pages = "107093",
volume = "96",
doi = "10.1016/j.polymertesting.2021.107093",
url = "https://hdl.handle.net/21.15107/rcub_dais_10535"
}
Pavlović, V. P., Tošić, D., Dojčilović, R., Dudić, D., Dramićanin, M. D., Medić, M., McPherson, M. M., Pavlović, V. B., Vlahović, B.,& Đoković, V.. (2021). PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing
Elsevier BV., 96, 107093.
https://doi.org/10.1016/j.polymertesting.2021.107093
https://hdl.handle.net/21.15107/rcub_dais_10535
Pavlović VP, Tošić D, Dojčilović R, Dudić D, Dramićanin MD, Medić M, McPherson MM, Pavlović VB, Vlahović B, Đoković V. PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing. 2021;96:107093.
doi:10.1016/j.polymertesting.2021.107093
https://hdl.handle.net/21.15107/rcub_dais_10535 .
Pavlović, Vera P., Tošić, Dragana, Dojčilović, Radovan, Dudić, Duško, Dramićanin, Miroslav D., Medić, Mina, McPherson, Michael M., Pavlović, Vladimir B., Vlahović, Branislav, Đoković, Vladimir, "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix" in Polymer Testing, 96 (2021):107093,
https://doi.org/10.1016/j.polymertesting.2021.107093 .,
https://hdl.handle.net/21.15107/rcub_dais_10535 .
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