TY  - JOUR
AU  - Kremenović, Aleksandar
AU  - Grujić-Brojčin, Mirjana
AU  - Tomić, Nataša
AU  - Lazović, Vladimir
AU  - Bajuk-Bogdanović, Danica
AU  - Krstić, Jugoslav
AU  - Šćepanović, Maja
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5424
AB  - A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results for both anatase and brookite. The experimental Raman spectra of all the samples in the region 100-200 cm-1are dominated by a strong feature primarily composed of the most intense modes of anatase (Eg ) and brookite (A 1g ). The anatase crystallite sizes of 14-17 nm, estimated by XRPD, suggest the application of the phonon confinement model (PCM) for the analysis of the anatase Eg mode, whereas the relatively large brookite crystallite size (27-29 nm) does not imply the use of the PCM for the brookite A 1g mode. Superposition of the anatase Eg mode profile, calculated by the PCM, and the Lorentzian shape of the brookite A 1g mode provide an appropriate simulation of the change in the dominant Raman feature in the spectra of TiO2-based nanocomposites with carbon. Raman spectra measured in the high-frequency range (1000-2000 cm-1) provide information on carbon in the investigated nanocomposite materials. The results from field-emission scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy and nitrogen physisorption measurements support the XRPD and Raman results.
PB  - UK : International Union of Crystallography
T2  - Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials
T1  - Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis
VL  - 78
SP  - 214
EP  - 222
DO  - 10.1107/S2052520622001731
ER  - 

@article{
author = "Kremenović, Aleksandar and Grujić-Brojčin, Mirjana and Tomić, Nataša and Lazović, Vladimir and Bajuk-Bogdanović, Danica and Krstić, Jugoslav and Šćepanović, Maja",
year = "2022",
abstract = "A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results for both anatase and brookite. The experimental Raman spectra of all the samples in the region 100-200 cm-1are dominated by a strong feature primarily composed of the most intense modes of anatase (Eg ) and brookite (A 1g ). The anatase crystallite sizes of 14-17 nm, estimated by XRPD, suggest the application of the phonon confinement model (PCM) for the analysis of the anatase Eg mode, whereas the relatively large brookite crystallite size (27-29 nm) does not imply the use of the PCM for the brookite A 1g mode. Superposition of the anatase Eg mode profile, calculated by the PCM, and the Lorentzian shape of the brookite A 1g mode provide an appropriate simulation of the change in the dominant Raman feature in the spectra of TiO2-based nanocomposites with carbon. Raman spectra measured in the high-frequency range (1000-2000 cm-1) provide information on carbon in the investigated nanocomposite materials. The results from field-emission scanning electron microscope (SEM), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy and nitrogen physisorption measurements support the XRPD and Raman results.",
publisher = "UK : International Union of Crystallography",
journal = "Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials",
title = "Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis",
volume = "78",
pages = "214-222",
doi = "10.1107/S2052520622001731"
}

Kremenović, A., Grujić-Brojčin, M., Tomić, N., Lazović, V., Bajuk-Bogdanović, D., Krstić, J.,& Šćepanović, M.. (2022). Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis. in Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials
UK : International Union of Crystallography., 78, 214-222.
https://doi.org/10.1107/S2052520622001731

Kremenović A, Grujić-Brojčin M, Tomić N, Lazović V, Bajuk-Bogdanović D, Krstić J, Šćepanović M. Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis. in Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials. 2022;78:214-222.
doi:10.1107/S2052520622001731 .

Kremenović, Aleksandar, Grujić-Brojčin, Mirjana, Tomić, Nataša, Lazović, Vladimir, Bajuk-Bogdanović, Danica, Krstić, Jugoslav, Šćepanović, Maja, "Size-strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis" in Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 78 (2022):214-222,
https://doi.org/10.1107/S2052520622001731 . .

TY  - JOUR
AU  - Finčur, Nina L.
AU  - Šćepanović, Maja
AU  - Grujić-Brojčin, Mirjana
AU  - Abramović, Biljana F.
AU  - Krstić, Jugoslav
AU  - Kremenović, Aleksandar
AU  - Srećković, Tatjana
AU  - Golubović, Aleksandar
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3025
AB  - Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6+, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped nanopowders have shown enhanced adsorption and higher efficiency in photodegradation of AMI in comparison to TiO2 Degussa P25 under the same conditions. The catalyst doped with 0.4 mol% of W6+, which has shown the highest efficiency in degradation of AMI under SSI, has
also been tested in degradation of alprazolam (ALP). The effect of substrate type (AMI and ALP), catalyst loading, and initial substrate concentration on photocatalytic degradation using SSI was examined. The identification of the species responsible for the photocatalytic degradation of AMI and ALP by the catalyst doped with 0.4 mol% of W6+ was performed in the presence of various scavengers under SSI. The major role in degradation of AMI may be attributed to hydroxyl radicals, whereas superoxide anion radicals, singlet molecular oxygen and hydroxyl radicals contribute to degradation of ALP.
PB  - Springer
T2  - Journal of Sol-Gel Science and Technology
T1  - Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
VL  - 90
IS  - 3
SP  - 510
EP  - 524
DO  - 10.1007/s10971-019-04925-4
ER  - 

@article{
author = "Finčur, Nina L. and Šćepanović, Maja and Grujić-Brojčin, Mirjana and Abramović, Biljana F. and Krstić, Jugoslav and Kremenović, Aleksandar and Srećković, Tatjana and Golubović, Aleksandar",
year = "2019",
abstract = "Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6+, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped nanopowders have shown enhanced adsorption and higher efficiency in photodegradation of AMI in comparison to TiO2 Degussa P25 under the same conditions. The catalyst doped with 0.4 mol% of W6+, which has shown the highest efficiency in degradation of AMI under SSI, has
also been tested in degradation of alprazolam (ALP). The effect of substrate type (AMI and ALP), catalyst loading, and initial substrate concentration on photocatalytic degradation using SSI was examined. The identification of the species responsible for the photocatalytic degradation of AMI and ALP by the catalyst doped with 0.4 mol% of W6+ was performed in the presence of various scavengers under SSI. The major role in degradation of AMI may be attributed to hydroxyl radicals, whereas superoxide anion radicals, singlet molecular oxygen and hydroxyl radicals contribute to degradation of ALP.",
publisher = "Springer",
journal = "Journal of Sol-Gel Science and Technology",
title = "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content",
volume = "90",
number = "3",
pages = "510-524",
doi = "10.1007/s10971-019-04925-4"
}

Finčur, N. L., Šćepanović, M., Grujić-Brojčin, M., Abramović, B. F., Krstić, J., Kremenović, A., Srećković, T.,& Golubović, A.. (2019). Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content. in Journal of Sol-Gel Science and Technology
Springer., 90(3), 510-524.
https://doi.org/10.1007/s10971-019-04925-4

Finčur NL, Šćepanović M, Grujić-Brojčin M, Abramović BF, Krstić J, Kremenović A, Srećković T, Golubović A. Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content. in Journal of Sol-Gel Science and Technology. 2019;90(3):510-524.
doi:10.1007/s10971-019-04925-4 .

Finčur, Nina L., Šćepanović, Maja, Grujić-Brojčin, Mirjana, Abramović, Biljana F., Krstić, Jugoslav, Kremenović, Aleksandar, Srećković, Tatjana, Golubović, Aleksandar, "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, 90, no. 3 (2019):510-524,
https://doi.org/10.1007/s10971-019-04925-4 . .