TY  - JOUR
AU  - Golubović, A.
AU  - Simović, Bojana
AU  - Šćepanović, Maja
AU  - Mijin, Dušan
AU  - Matković, Aleksandar
AU  - Grujic-Brojcin, M.
AU  - Babić, Biljana M.
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/912
AB  - The titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor, varying the temperature of calcination (from 500 to 550 degrees C with the step of 10 degrees C). XRPD results have shown that all synthesized nanopowders are dominantly in anatase phase. The analysis of the shift and linewidth of the most intensive anatase E-g Raman mode confirmed the XRPD results and added the presence of small amount of highly disordered brookite phase in all samples. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 1.5 and 4.5 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16). The sample calcined at temperature of 510 degrees C showed the best photocatalytic performance.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Synthesis of Anatase Nanopowders by Sol-gel Method and Influence of Temperatures of Calcination to Their Photocatalitic Properties
EP  - 49
IS  - 1
SP  - 41
VL  - 47
DO  - 10.2298/SOS1501041G
ER  - 

@article{
author = "Golubović, A. and Simović, Bojana and Šćepanović, Maja and Mijin, Dušan and Matković, Aleksandar and Grujic-Brojcin, M. and Babić, Biljana M.",
year = "2015",
abstract = "The titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor, varying the temperature of calcination (from 500 to 550 degrees C with the step of 10 degrees C). XRPD results have shown that all synthesized nanopowders are dominantly in anatase phase. The analysis of the shift and linewidth of the most intensive anatase E-g Raman mode confirmed the XRPD results and added the presence of small amount of highly disordered brookite phase in all samples. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 1.5 and 4.5 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16). The sample calcined at temperature of 510 degrees C showed the best photocatalytic performance.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Synthesis of Anatase Nanopowders by Sol-gel Method and Influence of Temperatures of Calcination to Their Photocatalitic Properties",
pages = "49-41",
number = "1",
volume = "47",
doi = "10.2298/SOS1501041G"
}

Golubović, A., Simović, B., Šćepanović, M., Mijin, D., Matković, A., Grujic-Brojcin, M.,& Babić, B. M.. (2015). Synthesis of Anatase Nanopowders by Sol-gel Method and Influence of Temperatures of Calcination to Their Photocatalitic Properties. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 41-49.
https://doi.org/10.2298/SOS1501041G

Golubović A, Simović B, Šćepanović M, Mijin D, Matković A, Grujic-Brojcin M, Babić BM. Synthesis of Anatase Nanopowders by Sol-gel Method and Influence of Temperatures of Calcination to Their Photocatalitic Properties. in Science of Sintering. 2015;47(1):41-49.
doi:10.2298/SOS1501041G .

Golubović, A., Simović, Bojana, Šćepanović, Maja, Mijin, Dušan, Matković, Aleksandar, Grujic-Brojcin, M., Babić, Biljana M., "Synthesis of Anatase Nanopowders by Sol-gel Method and Influence of Temperatures of Calcination to Their Photocatalitic Properties" in Science of Sintering, 47, no. 1 (2015):41-49,
https://doi.org/10.2298/SOS1501041G . .

TY  - JOUR
AU  - Tomic, N.
AU  - Grujic-Brojcin, M.
AU  - Fincur, N.
AU  - Abramović, B.
AU  - Simović, Bojana
AU  - Krstic, J.
AU  - Matović, Branko
AU  - Šćepanović, Maja
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/842
AB  - Two series of nanocrystalline brookite-type powders have been synthesized by using combined sal gel hydrothermal method with titanium tetrachloride (TiCI4) as a precursor and hydrothermal temperature and reaction time varied in the range of 120-200 degrees C and 12-48 h, respectively. The effects of chosen synthesis parameters on structural, morphological and optical properties of synthesized powders have been investigated by the XRPD, SEM, EDS and BET measurements, as well Raman spectroscopy and spectroscopic ellipsometry. The XRPD results have shown that pure brookite phase, with mean crystallite size of -33 nm, has been obtained only in the sample synthesized at 200 degrees C, after 24 h of hydrothermal process. In all other samples anatase phase also appears, whereas rutile and sodium titanate phases have been noticed in the samples synthesized at lower temperatures. The presence of different titania phases has also been confirmed and analyzed by Raman scattering measurements. The SEM measurements have shown spindle-like particles in brookite-rich samples synthesized at 200 degrees C, whereas BET measurements have detected mesoporous structure in these samples. The properties of synthesized powders have been correlated to their photocatalytic efficiency, tested in degradation of alprazolam, one of the 5th generation benzodiazepines. The sample consisted of pure brookite has shown the highest efficiency in the photodegradation of alprazolam, practically equal to the activity of Degussa P25.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Photocatalytic degradation of alprazolam in water suspension of brookite type TiO2 nanopowders prepared using hydrothermal route
EP  - 528
SP  - 518
VL  - 163
DO  - 10.1016/j.matchemphys.2015.08.008
ER  - 

@article{
author = "Tomic, N. and Grujic-Brojcin, M. and Fincur, N. and Abramović, B. and Simović, Bojana and Krstic, J. and Matović, Branko and Šćepanović, Maja",
year = "2015",
abstract = "Two series of nanocrystalline brookite-type powders have been synthesized by using combined sal gel hydrothermal method with titanium tetrachloride (TiCI4) as a precursor and hydrothermal temperature and reaction time varied in the range of 120-200 degrees C and 12-48 h, respectively. The effects of chosen synthesis parameters on structural, morphological and optical properties of synthesized powders have been investigated by the XRPD, SEM, EDS and BET measurements, as well Raman spectroscopy and spectroscopic ellipsometry. The XRPD results have shown that pure brookite phase, with mean crystallite size of -33 nm, has been obtained only in the sample synthesized at 200 degrees C, after 24 h of hydrothermal process. In all other samples anatase phase also appears, whereas rutile and sodium titanate phases have been noticed in the samples synthesized at lower temperatures. The presence of different titania phases has also been confirmed and analyzed by Raman scattering measurements. The SEM measurements have shown spindle-like particles in brookite-rich samples synthesized at 200 degrees C, whereas BET measurements have detected mesoporous structure in these samples. The properties of synthesized powders have been correlated to their photocatalytic efficiency, tested in degradation of alprazolam, one of the 5th generation benzodiazepines. The sample consisted of pure brookite has shown the highest efficiency in the photodegradation of alprazolam, practically equal to the activity of Degussa P25.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Photocatalytic degradation of alprazolam in water suspension of brookite type TiO2 nanopowders prepared using hydrothermal route",
pages = "528-518",
volume = "163",
doi = "10.1016/j.matchemphys.2015.08.008"
}

Tomic, N., Grujic-Brojcin, M., Fincur, N., Abramović, B., Simović, B., Krstic, J., Matović, B.,& Šćepanović, M.. (2015). Photocatalytic degradation of alprazolam in water suspension of brookite type TiO2 nanopowders prepared using hydrothermal route. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 163, 518-528.
https://doi.org/10.1016/j.matchemphys.2015.08.008

Tomic N, Grujic-Brojcin M, Fincur N, Abramović B, Simović B, Krstic J, Matović B, Šćepanović M. Photocatalytic degradation of alprazolam in water suspension of brookite type TiO2 nanopowders prepared using hydrothermal route. in Materials Chemistry and Physics. 2015;163:518-528.
doi:10.1016/j.matchemphys.2015.08.008 .

Tomic, N., Grujic-Brojcin, M., Fincur, N., Abramović, B., Simović, Bojana, Krstic, J., Matović, Branko, Šćepanović, Maja, "Photocatalytic degradation of alprazolam in water suspension of brookite type TiO2 nanopowders prepared using hydrothermal route" in Materials Chemistry and Physics, 163 (2015):518-528,
https://doi.org/10.1016/j.matchemphys.2015.08.008 . .

TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Šćepanović, Maja
AU  - Srećković, Tatjana
AU  - Grujic-Brojcin, M.
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2008
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/268
AB  - Zinc oxide nanoparticles were obtained by milling in a planetary ball mill with a zirconia milling assembly for up to 5 h in air. The samples were characterized by scanning electron microscopy, x-ray diffraction (XRD) and Raman spectroscopy methods. The deviation of the lattice parameters from single crystal values was related to defect creation and increase of strain inside the hexagonal lattice of milled ZnO nanoparticles. The observed redshift and peak broadening of the major first-order Raman modes were ascribed to the formation of intrinsic defects by mechanical milling combined with the effects of phonon confinement in nanosized powders. To investigate the type of intrinsic defects and impurities introduced during milling, it was necessary to analyze both milled and thermally treated ZnO. After thermal treatment, the intensity of the Raman spectra increased and the peak positions reverted to values similar to those in unmilled ZnO powder, pointing to defect annihilation. XRD patterns of sintered samples confirmed the existence of zirconia impurities and the Rietveld analysis revealed a small amount of zirconium introduced in the ZnO crystal lattice on the Zn sites or interstitial sites. The large influence of those impurities on the micro-Raman spectra of thermally treated samples was observed in this study.
PB  - IOP Publishing Ltd, Bristol
T2  - Journal of Physics-Condensed Matter
T1  - Structural characterization of mechanically milled ZnO: influence of zirconia milling media
IS  - 47
VL  - 20
DO  - 10.1088/0953-8984/20/47/475202
ER  - 

@article{
author = "Vojisavljević, Katarina and Šćepanović, Maja and Srećković, Tatjana and Grujic-Brojcin, M. and Branković, Zorica and Branković, Goran",
year = "2008",
abstract = "Zinc oxide nanoparticles were obtained by milling in a planetary ball mill with a zirconia milling assembly for up to 5 h in air. The samples were characterized by scanning electron microscopy, x-ray diffraction (XRD) and Raman spectroscopy methods. The deviation of the lattice parameters from single crystal values was related to defect creation and increase of strain inside the hexagonal lattice of milled ZnO nanoparticles. The observed redshift and peak broadening of the major first-order Raman modes were ascribed to the formation of intrinsic defects by mechanical milling combined with the effects of phonon confinement in nanosized powders. To investigate the type of intrinsic defects and impurities introduced during milling, it was necessary to analyze both milled and thermally treated ZnO. After thermal treatment, the intensity of the Raman spectra increased and the peak positions reverted to values similar to those in unmilled ZnO powder, pointing to defect annihilation. XRD patterns of sintered samples confirmed the existence of zirconia impurities and the Rietveld analysis revealed a small amount of zirconium introduced in the ZnO crystal lattice on the Zn sites or interstitial sites. The large influence of those impurities on the micro-Raman spectra of thermally treated samples was observed in this study.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Journal of Physics-Condensed Matter",
title = "Structural characterization of mechanically milled ZnO: influence of zirconia milling media",
number = "47",
volume = "20",
doi = "10.1088/0953-8984/20/47/475202"
}

Vojisavljević, K., Šćepanović, M., Srećković, T., Grujic-Brojcin, M., Branković, Z.,& Branković, G.. (2008). Structural characterization of mechanically milled ZnO: influence of zirconia milling media. in Journal of Physics-Condensed Matter
IOP Publishing Ltd, Bristol., 20(47).
https://doi.org/10.1088/0953-8984/20/47/475202

Vojisavljević K, Šćepanović M, Srećković T, Grujic-Brojcin M, Branković Z, Branković G. Structural characterization of mechanically milled ZnO: influence of zirconia milling media. in Journal of Physics-Condensed Matter. 2008;20(47).
doi:10.1088/0953-8984/20/47/475202 .

Vojisavljević, Katarina, Šćepanović, Maja, Srećković, Tatjana, Grujic-Brojcin, M., Branković, Zorica, Branković, Goran, "Structural characterization of mechanically milled ZnO: influence of zirconia milling media" in Journal of Physics-Condensed Matter, 20, no. 47 (2008),
https://doi.org/10.1088/0953-8984/20/47/475202 . .