TY  - JOUR
AU  - Golubović, Aleksandar
AU  - Veljković, Ivana
AU  - Scepanović, Maja
AU  - Grujić-Brojčin, Mirjana
AU  - Tomić, Nataša M.
AU  - Mijin, Dušan
AU  - Babić, Biljana M.
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3436
AB  - Titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor by varying some parameters of the sol-gel synthesis, such as temperature (500 and 550 degrees C) and the duration of calcination (1.5, 2 and 2.5 h). X-ray powder diffraction (XRPD) results have shown that all synthesized nanopowders were dominantly in the anatase phase, with the presence of a small amount of rutile in samples calcined at 550 degrees C. According to the results obtained by the Williamson-Hall method, the anatase crystallite size was increased with the duration of the calcination (from 24 to 29 nm in samples calcined at lower temperature, and from 30 to 35 nm in samples calcined at higher temperature). The analysis of the shift and line-width of the most intensive anatase Eg Raman mode confirmed the XRPD results. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 5-8 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16), car-bofuran ray scattering.
PB  - Savez hemijskih inženjera, Beograd
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - Influence of some sol-gel synthesis parameters of mesoporous tio2 on photocatalytic degradation of pollutants
EP  - 73
IS  - 1
SP  - 65
VL  - 22
DO  - 10.2298/CICEQ150110020G
ER  - 

@article{
author = "Golubović, Aleksandar and Veljković, Ivana and Scepanović, Maja and Grujić-Brojčin, Mirjana and Tomić, Nataša M. and Mijin, Dušan and Babić, Biljana M.",
year = "2016",
abstract = "Titanium dioxide (TiO2) nanopowders were produced by sol-gel technique from tetrabutyl titanate as a precursor by varying some parameters of the sol-gel synthesis, such as temperature (500 and 550 degrees C) and the duration of calcination (1.5, 2 and 2.5 h). X-ray powder diffraction (XRPD) results have shown that all synthesized nanopowders were dominantly in the anatase phase, with the presence of a small amount of rutile in samples calcined at 550 degrees C. According to the results obtained by the Williamson-Hall method, the anatase crystallite size was increased with the duration of the calcination (from 24 to 29 nm in samples calcined at lower temperature, and from 30 to 35 nm in samples calcined at higher temperature). The analysis of the shift and line-width of the most intensive anatase Eg Raman mode confirmed the XRPD results. The analysis of pore structure from nitrogen sorption experimental data described all samples as mesoporous, with mean pore diameters in the range of 5-8 nm. Nanopowder properties have been related to the photocatalytic activity, tested in degradation of the textile dye (C.I. Reactive Orange 16), car-bofuran ray scattering.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "Influence of some sol-gel synthesis parameters of mesoporous tio2 on photocatalytic degradation of pollutants",
pages = "73-65",
number = "1",
volume = "22",
doi = "10.2298/CICEQ150110020G"
}

Golubović, A., Veljković, I., Scepanović, M., Grujić-Brojčin, M., Tomić, N. M., Mijin, D.,& Babić, B. M.. (2016). Influence of some sol-gel synthesis parameters of mesoporous tio2 on photocatalytic degradation of pollutants. in Chemical Industry & Chemical Engineering Quarterly
Savez hemijskih inženjera, Beograd., 22(1), 65-73.
https://doi.org/10.2298/CICEQ150110020G

Golubović A, Veljković I, Scepanović M, Grujić-Brojčin M, Tomić NM, Mijin D, Babić BM. Influence of some sol-gel synthesis parameters of mesoporous tio2 on photocatalytic degradation of pollutants. in Chemical Industry & Chemical Engineering Quarterly. 2016;22(1):65-73.
doi:10.2298/CICEQ150110020G .

Golubović, Aleksandar, Veljković, Ivana, Scepanović, Maja, Grujić-Brojčin, Mirjana, Tomić, Nataša M., Mijin, Dušan, Babić, Biljana M., "Influence of some sol-gel synthesis parameters of mesoporous tio2 on photocatalytic degradation of pollutants" in Chemical Industry & Chemical Engineering Quarterly, 22, no. 1 (2016):65-73,
https://doi.org/10.2298/CICEQ150110020G . .

TY  - JOUR
AU  - Simović, Bojana
AU  - Golubović, Aleksandar
AU  - Veljković, Ivana
AU  - Poleti, Dejan
AU  - Zdravković, Jelena D.
AU  - Mijin, Dušan
AU  - Bjelajac, Anđelika
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2702
AB  - In this work, zinc oxide powders were obtained by two different techniques: hydro- and solvothermal synthesis starting from Zn(NO3)(2) and Zn(CH3COO)(2), respectively. The influence of synthetic procedure on the structural, microstructural, thermal and photocatalytic properties of the prepared ZnO powders was investigated. Both ZnO samples were further annealed under moderate conditions (300 degrees C) to avoid grain growth and to remove traces of impurities. In all four cases, single-phase hexagonal ZnO was confirmed by X-ray powder diffraction. The morphologies of prepared ZnO powders were different and they varied from rounded nanograins to microrods. All prepared samples showed higher photocatalytic efficiency in the degradation of the textile azo dye Reactive Orange 16 (RO16) than commercial ZnO. In addition, the non-annealed samples had better photocatalytic properties than the commercial Degussa P25 TiO2 powder.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye
EP  - 1443
IS  - 11
SP  - 1433
VL  - 79
DO  - 10.2298/JSC140520077S
ER  - 

@article{
author = "Simović, Bojana and Golubović, Aleksandar and Veljković, Ivana and Poleti, Dejan and Zdravković, Jelena D. and Mijin, Dušan and Bjelajac, Anđelika",
year = "2014",
abstract = "In this work, zinc oxide powders were obtained by two different techniques: hydro- and solvothermal synthesis starting from Zn(NO3)(2) and Zn(CH3COO)(2), respectively. The influence of synthetic procedure on the structural, microstructural, thermal and photocatalytic properties of the prepared ZnO powders was investigated. Both ZnO samples were further annealed under moderate conditions (300 degrees C) to avoid grain growth and to remove traces of impurities. In all four cases, single-phase hexagonal ZnO was confirmed by X-ray powder diffraction. The morphologies of prepared ZnO powders were different and they varied from rounded nanograins to microrods. All prepared samples showed higher photocatalytic efficiency in the degradation of the textile azo dye Reactive Orange 16 (RO16) than commercial ZnO. In addition, the non-annealed samples had better photocatalytic properties than the commercial Degussa P25 TiO2 powder.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye",
pages = "1443-1433",
number = "11",
volume = "79",
doi = "10.2298/JSC140520077S"
}

Simović, B., Golubović, A., Veljković, I., Poleti, D., Zdravković, J. D., Mijin, D.,& Bjelajac, A.. (2014). Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(11), 1433-1443.
https://doi.org/10.2298/JSC140520077S

Simović B, Golubović A, Veljković I, Poleti D, Zdravković JD, Mijin D, Bjelajac A. Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye. in Journal of the Serbian Chemical Society. 2014;79(11):1433-1443.
doi:10.2298/JSC140520077S .

Simović, Bojana, Golubović, Aleksandar, Veljković, Ivana, Poleti, Dejan, Zdravković, Jelena D., Mijin, Dušan, Bjelajac, Anđelika, "Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye" in Journal of the Serbian Chemical Society, 79, no. 11 (2014):1433-1443,
https://doi.org/10.2298/JSC140520077S . .

TY  - JOUR
AU  - Zdujić, Miodrag
AU  - Jovalekić, Čedomir
AU  - Poleti, Dejan
AU  - Veljković, Ivana
AU  - Karanović, Ljiljana
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5533
AB  - Concurrent milling of Bi4Ti3O12 was carried out in a planetary ball mill with hardened-steel 13 or 6 mm diameter balls with a goal to investigate how the system responds to the constrains imposed by milling. Milling intensity for various milling parameters was derived from the electrical power measurement. The reverse amorphous ↔ crystalline phase transition induced by milling is governed by impact energy and frequency. Below a certain threshold value of impact energy crystallization does not occur, whereas a higher impact frequency accelerates amorphization. Mechanochemical reactions are predominantly discrete processes, which occur at the moment of impact. © 2009 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Materials Letters
T1  - Mechanochemically induced amorphous/crystalline phase transition in the Bi4Ti3O12 compound
EP  - 2544
IS  - 29
SP  - 2542
VL  - 63
DO  - 10.1016/j.matlet.2009.08.055
UR  - https://hdl.handle.net/21.15107/rcub_dais_3454
ER  - 

@article{
author = "Zdujić, Miodrag and Jovalekić, Čedomir and Poleti, Dejan and Veljković, Ivana and Karanović, Ljiljana",
year = "2009",
abstract = "Concurrent milling of Bi4Ti3O12 was carried out in a planetary ball mill with hardened-steel 13 or 6 mm diameter balls with a goal to investigate how the system responds to the constrains imposed by milling. Milling intensity for various milling parameters was derived from the electrical power measurement. The reverse amorphous ↔ crystalline phase transition induced by milling is governed by impact energy and frequency. Below a certain threshold value of impact energy crystallization does not occur, whereas a higher impact frequency accelerates amorphization. Mechanochemical reactions are predominantly discrete processes, which occur at the moment of impact. © 2009 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Mechanochemically induced amorphous/crystalline phase transition in the Bi4Ti3O12 compound",
pages = "2544-2542",
number = "29",
volume = "63",
doi = "10.1016/j.matlet.2009.08.055",
url = "https://hdl.handle.net/21.15107/rcub_dais_3454"
}

Zdujić, M., Jovalekić, Č., Poleti, D., Veljković, I.,& Karanović, L.. (2009). Mechanochemically induced amorphous/crystalline phase transition in the Bi4Ti3O12 compound. in Materials Letters
Elsevier., 63(29), 2542-2544.
https://doi.org/10.1016/j.matlet.2009.08.055
https://hdl.handle.net/21.15107/rcub_dais_3454

Zdujić M, Jovalekić Č, Poleti D, Veljković I, Karanović L. Mechanochemically induced amorphous/crystalline phase transition in the Bi4Ti3O12 compound. in Materials Letters. 2009;63(29):2542-2544.
doi:10.1016/j.matlet.2009.08.055
https://hdl.handle.net/21.15107/rcub_dais_3454 .

Zdujić, Miodrag, Jovalekić, Čedomir, Poleti, Dejan, Veljković, Ivana, Karanović, Ljiljana, "Mechanochemically induced amorphous/crystalline phase transition in the Bi4Ti3O12 compound" in Materials Letters, 63, no. 29 (2009):2542-2544,
https://doi.org/10.1016/j.matlet.2009.08.055 .,
https://hdl.handle.net/21.15107/rcub_dais_3454 .

TY  - JOUR
AU  - Veljković, Ivana
AU  - Poleti, Dejan
AU  - Zdujić, Miodrag
AU  - Karanović, Ljiljana
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5534
AB  - Mechanochemistry represents an alternative route in synthesis of nanomaterials. Mechanochemical routes are attractive because of their simplicity, flexibility, and ability to prepare materials by solid state reactions at room temperature. The aim of this work is the mechanochemical synthesis of nanostructured titanium oxides of different composition starting from mixtures of Ti and TiO2, TiO and TiO2 or Ti 2O3 and TiO2. Emphasis is on the Magneli phases Ti4O7 and Ti5O9 because their mixture is commercially known as EBONEX material. The materials prepared were characterized by XRPD, TG/DTA analysis, SEM and optical microscopy. Titanium monoxide and several Magneli oxides, Ti4O7, Ti 5O9 and Ti6O11, are successsfully prepared. The results are very interesting because the EBONEX materials were prepared at lower than usual temperature, which would decrease the effective cost of production.
PB  - Belgrade : Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Mechanochemistry of titanium oxides
EP  - 251
IS  - 3
SP  - 247
VL  - 63
DO  - 10.2298/HEMIND0903247V
UR  - https://hdl.handle.net/21.15107/rcub_dais_3458
ER  - 

@article{
author = "Veljković, Ivana and Poleti, Dejan and Zdujić, Miodrag and Karanović, Ljiljana",
year = "2009",
abstract = "Mechanochemistry represents an alternative route in synthesis of nanomaterials. Mechanochemical routes are attractive because of their simplicity, flexibility, and ability to prepare materials by solid state reactions at room temperature. The aim of this work is the mechanochemical synthesis of nanostructured titanium oxides of different composition starting from mixtures of Ti and TiO2, TiO and TiO2 or Ti 2O3 and TiO2. Emphasis is on the Magneli phases Ti4O7 and Ti5O9 because their mixture is commercially known as EBONEX material. The materials prepared were characterized by XRPD, TG/DTA analysis, SEM and optical microscopy. Titanium monoxide and several Magneli oxides, Ti4O7, Ti 5O9 and Ti6O11, are successsfully prepared. The results are very interesting because the EBONEX materials were prepared at lower than usual temperature, which would decrease the effective cost of production.",
publisher = "Belgrade : Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Mechanochemistry of titanium oxides",
pages = "251-247",
number = "3",
volume = "63",
doi = "10.2298/HEMIND0903247V",
url = "https://hdl.handle.net/21.15107/rcub_dais_3458"
}

Veljković, I., Poleti, D., Zdujić, M.,& Karanović, L.. (2009). Mechanochemistry of titanium oxides. in Hemijska industrija
Belgrade : Association of the Chemical Engineers of Serbia., 63(3), 247-251.
https://doi.org/10.2298/HEMIND0903247V
https://hdl.handle.net/21.15107/rcub_dais_3458

Veljković I, Poleti D, Zdujić M, Karanović L. Mechanochemistry of titanium oxides. in Hemijska industrija. 2009;63(3):247-251.
doi:10.2298/HEMIND0903247V
https://hdl.handle.net/21.15107/rcub_dais_3458 .

Veljković, Ivana, Poleti, Dejan, Zdujić, Miodrag, Karanović, Ljiljana, "Mechanochemistry of titanium oxides" in Hemijska industrija, 63, no. 3 (2009):247-251,
https://doi.org/10.2298/HEMIND0903247V .,
https://hdl.handle.net/21.15107/rcub_dais_3458 .