TY  - JOUR
AU  - Milojević-Rakić, Maja
AU  - Janošević, Aleksandra
AU  - Krstić, Jugoslav
AU  - Nedić-Vasiljević, Bojana
AU  - Dondur, Vera
AU  - Ciric-Marjanovic, Gordana
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1188
AB  - Nanostructured and granular polyanilines (PANIs) and their composites with zeolite ZSM-5, synthesized by the oxidative polymerization of aniline in water and aqueous solution of sulfuric acid, are evaluated as adsorbents of the organic herbicide glyphosate [N-(phosphonomethyl)glycine] in aqueous solution. The protonated and deprotonated forms of synthesized materials were characterized by elemental and thermogravimetric analysis, scanning electron microscopy, FTIR, Raman and UV-Vis spectroscopies, X-ray powder diffraction, and nitrogen physisorption measurements. The adsorption isotherms of glyphosate on studied materials were best fitted by Freundlich and Langmuir-Freundlich models. The adsorption characteristics of the investigated PANIs and PANI/ZSM-5 composites were found to be much more influenced by the oxidation state and protonation level of PANI in the adsorbents then by the textural and morphological properties of materials. The highest adsorption of glyphosate among all investigated PANI and PANI/ZSM-5 samples, as well as pure ZSM-5, exhibited the deprotonated granular PANI which was synthesized in sulfuric acid medium (98.5 mg/g). High adsorption capacity also showed the deprotonated PANI/ZSM-5 composite with similar to 50% of zeolite (61.9 mg/g) and the protonated nanostructured PANI (59.9 mg/g), both materials prepared in water without added acid.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution
VL  - 180
SP  - 141
EP  - 155
DO  - 10.1016/j.micromeso.2013.06.025
ER  - 

@article{
author = "Milojević-Rakić, Maja and Janošević, Aleksandra and Krstić, Jugoslav and Nedić-Vasiljević, Bojana and Dondur, Vera and Ciric-Marjanovic, Gordana",
year = "2013",
abstract = "Nanostructured and granular polyanilines (PANIs) and their composites with zeolite ZSM-5, synthesized by the oxidative polymerization of aniline in water and aqueous solution of sulfuric acid, are evaluated as adsorbents of the organic herbicide glyphosate [N-(phosphonomethyl)glycine] in aqueous solution. The protonated and deprotonated forms of synthesized materials were characterized by elemental and thermogravimetric analysis, scanning electron microscopy, FTIR, Raman and UV-Vis spectroscopies, X-ray powder diffraction, and nitrogen physisorption measurements. The adsorption isotherms of glyphosate on studied materials were best fitted by Freundlich and Langmuir-Freundlich models. The adsorption characteristics of the investigated PANIs and PANI/ZSM-5 composites were found to be much more influenced by the oxidation state and protonation level of PANI in the adsorbents then by the textural and morphological properties of materials. The highest adsorption of glyphosate among all investigated PANI and PANI/ZSM-5 samples, as well as pure ZSM-5, exhibited the deprotonated granular PANI which was synthesized in sulfuric acid medium (98.5 mg/g). High adsorption capacity also showed the deprotonated PANI/ZSM-5 composite with similar to 50% of zeolite (61.9 mg/g) and the protonated nanostructured PANI (59.9 mg/g), both materials prepared in water without added acid.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution",
volume = "180",
pages = "141-155",
doi = "10.1016/j.micromeso.2013.06.025"
}

Milojević-Rakić, M., Janošević, A., Krstić, J., Nedić-Vasiljević, B., Dondur, V.,& Ciric-Marjanovic, G.. (2013). Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution. in Microporous and Mesoporous Materials
Elsevier., 180, 141-155.
https://doi.org/10.1016/j.micromeso.2013.06.025

Milojević-Rakić M, Janošević A, Krstić J, Nedić-Vasiljević B, Dondur V, Ciric-Marjanovic G. Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution. in Microporous and Mesoporous Materials. 2013;180:141-155.
doi:10.1016/j.micromeso.2013.06.025 .

Milojević-Rakić, Maja, Janošević, Aleksandra, Krstić, Jugoslav, Nedić-Vasiljević, Bojana, Dondur, Vera, Ciric-Marjanovic, Gordana, "Polyaniline and its composites with zeolite ZSM-5 for efficient removal of glyphosate from aqueous solution" in Microporous and Mesoporous Materials, 180 (2013):141-155,
https://doi.org/10.1016/j.micromeso.2013.06.025 . .

TY  - JOUR
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
AU  - Mojović, Zorica
AU  - Jović-Jovičić, Nataša
AU  - Žunić, Marija
AU  - Dondur, Vera
AU  - Jovanović, Dušan M.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1016
AB  - In this work Al,Fe-pillared clays (PILCs) were applied as heterogeneous catalysts in catalytic wet peroxide oxidation of tartrazine azo-dye in water. A series of We PILCs with different Fe3+ content were synthesized. The degree of Fe incorporation into PILCs was in accordance with the amounts of introduced Fe. The influence of Fe content and reaction temperature on the efficiency of the decolorization of tartrazine solutions was investigated. The adsorption on PILCs was almost independent on temperature and rather inefficient. The adsorption slightly increased with increasing Fe3+ content. Simultaneous application of H2O2 and the Fe-containing PILCs significantly improved dye removal. Higher Fe content led to more efficient catalytic removal of the dye. Increased temperature did not affect adsorption while it drastically increased the catalytic removal of the dye. The stability and reusability of the PILC catalysts was confirmed.
PB  - Elsevier
T2  - Applied Clay Science
T1  - Al,Fe-pillared clays in catalytic decolorization of aqueous tartrazine solutions
VL  - 58
SP  - 73
EP  - 78
DO  - 10.1016/j.clay.2012.01.015
ER  - 

@article{
author = "Banković, Predrag and Milutinović Nikolić, Aleksandra and Mojović, Zorica and Jović-Jovičić, Nataša and Žunić, Marija and Dondur, Vera and Jovanović, Dušan M.",
year = "2012",
abstract = "In this work Al,Fe-pillared clays (PILCs) were applied as heterogeneous catalysts in catalytic wet peroxide oxidation of tartrazine azo-dye in water. A series of We PILCs with different Fe3+ content were synthesized. The degree of Fe incorporation into PILCs was in accordance with the amounts of introduced Fe. The influence of Fe content and reaction temperature on the efficiency of the decolorization of tartrazine solutions was investigated. The adsorption on PILCs was almost independent on temperature and rather inefficient. The adsorption slightly increased with increasing Fe3+ content. Simultaneous application of H2O2 and the Fe-containing PILCs significantly improved dye removal. Higher Fe content led to more efficient catalytic removal of the dye. Increased temperature did not affect adsorption while it drastically increased the catalytic removal of the dye. The stability and reusability of the PILC catalysts was confirmed.",
publisher = "Elsevier",
journal = "Applied Clay Science",
title = "Al,Fe-pillared clays in catalytic decolorization of aqueous tartrazine solutions",
volume = "58",
pages = "73-78",
doi = "10.1016/j.clay.2012.01.015"
}

Banković, P., Milutinović Nikolić, A., Mojović, Z., Jović-Jovičić, N., Žunić, M., Dondur, V.,& Jovanović, D. M.. (2012). Al,Fe-pillared clays in catalytic decolorization of aqueous tartrazine solutions. in Applied Clay Science
Elsevier., 58, 73-78.
https://doi.org/10.1016/j.clay.2012.01.015

Banković P, Milutinović Nikolić A, Mojović Z, Jović-Jovičić N, Žunić M, Dondur V, Jovanović DM. Al,Fe-pillared clays in catalytic decolorization of aqueous tartrazine solutions. in Applied Clay Science. 2012;58:73-78.
doi:10.1016/j.clay.2012.01.015 .

Banković, Predrag, Milutinović Nikolić, Aleksandra, Mojović, Zorica, Jović-Jovičić, Nataša, Žunić, Marija, Dondur, Vera, Jovanović, Dušan M., "Al,Fe-pillared clays in catalytic decolorization of aqueous tartrazine solutions" in Applied Clay Science, 58 (2012):73-78,
https://doi.org/10.1016/j.clay.2012.01.015 . .

TY  - JOUR
AU  - Anic, Mirjana
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Dondur, Vera
AU  - Damjanović, Ljiljana
AU  - Stoychev, Dimitar
AU  - Stefanov, Plamen
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/865
AB  - The deep oxidation of n-hexane was studied over Pt catalysts with small and large Pt crystallites, promoted by MnOx. The Mn was deposited on the Pt/Al2O3 by deposition-precipitation method using two alkalis, ammonia and dimethylamine. The strength of the base influenced morphology and performances of Mn-Pt catalysts. Ammonia formed mostly spherical structure of manganese oxide, while dimethylamine created fibrous needle-like shape of MnOx, typical for cryptomelane phase of manganese oxide. This was confirmed by XPS results that show an oxidation state of Mn close to that for cryptomelane. The Pt-Mn catalysts were more active than catalysts containing Pt only. Promoting effect of MnOx is more pronounced for larger Pt crystallites. Among Pt-Mn samples, catalysts synthesized with dimethylamine exhibited the highest activities. Mobility and reactivity of oxygen from Pt-O-Mn sites associated with cryptomelane phase may be responsible for increased activity.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation
VL  - 107
IS  - 3-4
SP  - 327
EP  - 332
DO  - 10.1016/j.apcatb.2011.07.032
ER  - 

@article{
author = "Anic, Mirjana and Radić, Nenad and Grbić, Boško and Dondur, Vera and Damjanović, Ljiljana and Stoychev, Dimitar and Stefanov, Plamen",
year = "2011",
abstract = "The deep oxidation of n-hexane was studied over Pt catalysts with small and large Pt crystallites, promoted by MnOx. The Mn was deposited on the Pt/Al2O3 by deposition-precipitation method using two alkalis, ammonia and dimethylamine. The strength of the base influenced morphology and performances of Mn-Pt catalysts. Ammonia formed mostly spherical structure of manganese oxide, while dimethylamine created fibrous needle-like shape of MnOx, typical for cryptomelane phase of manganese oxide. This was confirmed by XPS results that show an oxidation state of Mn close to that for cryptomelane. The Pt-Mn catalysts were more active than catalysts containing Pt only. Promoting effect of MnOx is more pronounced for larger Pt crystallites. Among Pt-Mn samples, catalysts synthesized with dimethylamine exhibited the highest activities. Mobility and reactivity of oxygen from Pt-O-Mn sites associated with cryptomelane phase may be responsible for increased activity.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation",
volume = "107",
number = "3-4",
pages = "327-332",
doi = "10.1016/j.apcatb.2011.07.032"
}

Anic, M., Radić, N., Grbić, B., Dondur, V., Damjanović, L., Stoychev, D.,& Stefanov, P.. (2011). Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation. in Applied Catalysis B-Environmental
Elsevier., 107(3-4), 327-332.
https://doi.org/10.1016/j.apcatb.2011.07.032

Anic M, Radić N, Grbić B, Dondur V, Damjanović L, Stoychev D, Stefanov P. Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation. in Applied Catalysis B-Environmental. 2011;107(3-4):327-332.
doi:10.1016/j.apcatb.2011.07.032 .

Anic, Mirjana, Radić, Nenad, Grbić, Boško, Dondur, Vera, Damjanović, Ljiljana, Stoychev, Dimitar, Stefanov, Plamen, "Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation" in Applied Catalysis B-Environmental, 107, no. 3-4 (2011):327-332,
https://doi.org/10.1016/j.apcatb.2011.07.032 . .

TY  - JOUR
AU  - Novaković, Tatjana
AU  - Rožić, Ljiljana
AU  - Petrović, Srđan
AU  - Vuković, Zorica
AU  - Dondur, Vera
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/641
AB  - Active porous alumina was prepared via a sol-gel method and subjected to thermal treatment in the temperature range 500-1200 °C. The addition of lanthanum effectively inhibited the surface area loss of the aluminas. Fractal analysis from nitrogen adsorption isotherm was used to study the pore surface roughness of alumina samples with different chemical compositions (PEG, PEG and lanthanum) and calcinations conditions in terms of the surface fractal dimension, d. The Mahnke and Mögel (MM) model was used to determine the value of d of La(III)-doped alumina. Following the MM model, the d value of the activated aluminas increased as the calcination temperature increased from 500 to 700 °C but decreased after calcination at 1000, 1100 and 1200 °C. The addition of polyethylene glycol (PEG 5600) to the boehmite sol reduced the surface fractal of the activated alumina due to the heterogeneous distribution of the pores. With increasing La(III) concentration from 0.015 to 0.045 mol La(III)/mol Al(III), the d value of La-modified alumina samples decreased, indicating a smoother surface. The obtained PEG+La-doped boehmite sol can be used as a precursor dispersion for the deposition of mesoporous alumina coatings on stainless steel foil, by the spray pyrolysis method.
AB  - Aktivni porozni aluminijum-oksid dobijen sol-gel metodom je termički obrađen na povišenim temperaturama u intervalu od 500 do 1200 °C. Ispitivan je uticaj temperature termičke obrade i dodatka polietilen glikola (PEG) i La(III) jona na specifičnu površinu, zapreminu pora i prečnik pora, kao i fraktalnu dimenziju površine aktiviranog aluminijum-oksida. Na osnovu podataka iz adsorpcionoesorpcionih izotermi azota određen je tip pora i izračunate su vrednosti osnovnih parametara teksturalnih svojstava uzoraka. Porast temperature termičke obrade prouzrokovao je smanjenje specifične površine sa 280 na 65 m2 g-1, zapremine pora sa 0,45 na 0,27 cm3 g-1, porast preovlađujućeg prečnika pora od 3 do 6 nm i porast fraktalne dimenzije površine od 2,068 do 2,192. Dobijeni bemitni sol sa dodatkom PEG i La(III) jona može se iskoristiti kao prekursorska disperzija pri sprej-pirolitičkoj metodi sinteze aluminijum oksidnih prevlaka na nosaču od nerđajućeg čelika.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Pore surface fractal analysis of PEG and La(III)-doped mesoporous alumina obtained by the sol-gel method
T1  - Fraktalna analiza površine mezoporoznog aluminijum(III)-oksida sa dodatkom PEG i La(III) dobijenog sol-gel postupkom
VL  - 75
IS  - 6
SP  - 833
EP  - 843
DO  - 10.2298/JSC090922053N
ER  - 

@article{
author = "Novaković, Tatjana and Rožić, Ljiljana and Petrović, Srđan and Vuković, Zorica and Dondur, Vera",
year = "2010",
abstract = "Active porous alumina was prepared via a sol-gel method and subjected to thermal treatment in the temperature range 500-1200 °C. The addition of lanthanum effectively inhibited the surface area loss of the aluminas. Fractal analysis from nitrogen adsorption isotherm was used to study the pore surface roughness of alumina samples with different chemical compositions (PEG, PEG and lanthanum) and calcinations conditions in terms of the surface fractal dimension, d. The Mahnke and Mögel (MM) model was used to determine the value of d of La(III)-doped alumina. Following the MM model, the d value of the activated aluminas increased as the calcination temperature increased from 500 to 700 °C but decreased after calcination at 1000, 1100 and 1200 °C. The addition of polyethylene glycol (PEG 5600) to the boehmite sol reduced the surface fractal of the activated alumina due to the heterogeneous distribution of the pores. With increasing La(III) concentration from 0.015 to 0.045 mol La(III)/mol Al(III), the d value of La-modified alumina samples decreased, indicating a smoother surface. The obtained PEG+La-doped boehmite sol can be used as a precursor dispersion for the deposition of mesoporous alumina coatings on stainless steel foil, by the spray pyrolysis method., Aktivni porozni aluminijum-oksid dobijen sol-gel metodom je termički obrađen na povišenim temperaturama u intervalu od 500 do 1200 °C. Ispitivan je uticaj temperature termičke obrade i dodatka polietilen glikola (PEG) i La(III) jona na specifičnu površinu, zapreminu pora i prečnik pora, kao i fraktalnu dimenziju površine aktiviranog aluminijum-oksida. Na osnovu podataka iz adsorpcionoesorpcionih izotermi azota određen je tip pora i izračunate su vrednosti osnovnih parametara teksturalnih svojstava uzoraka. Porast temperature termičke obrade prouzrokovao je smanjenje specifične površine sa 280 na 65 m2 g-1, zapremine pora sa 0,45 na 0,27 cm3 g-1, porast preovlađujućeg prečnika pora od 3 do 6 nm i porast fraktalne dimenzije površine od 2,068 do 2,192. Dobijeni bemitni sol sa dodatkom PEG i La(III) jona može se iskoristiti kao prekursorska disperzija pri sprej-pirolitičkoj metodi sinteze aluminijum oksidnih prevlaka na nosaču od nerđajućeg čelika.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Pore surface fractal analysis of PEG and La(III)-doped mesoporous alumina obtained by the sol-gel method, Fraktalna analiza površine mezoporoznog aluminijum(III)-oksida sa dodatkom PEG i La(III) dobijenog sol-gel postupkom",
volume = "75",
number = "6",
pages = "833-843",
doi = "10.2298/JSC090922053N"
}

Novaković, T., Rožić, L., Petrović, S., Vuković, Z.,& Dondur, V.. (2010). Pore surface fractal analysis of PEG and La(III)-doped mesoporous alumina obtained by the sol-gel method. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 75(6), 833-843.
https://doi.org/10.2298/JSC090922053N

Novaković T, Rožić L, Petrović S, Vuković Z, Dondur V. Pore surface fractal analysis of PEG and La(III)-doped mesoporous alumina obtained by the sol-gel method. in Journal of the Serbian Chemical Society. 2010;75(6):833-843.
doi:10.2298/JSC090922053N .

Novaković, Tatjana, Rožić, Ljiljana, Petrović, Srđan, Vuković, Zorica, Dondur, Vera, "Pore surface fractal analysis of PEG and La(III)-doped mesoporous alumina obtained by the sol-gel method" in Journal of the Serbian Chemical Society, 75, no. 6 (2010):833-843,
https://doi.org/10.2298/JSC090922053N . .

TY  - JOUR
AU  - Ciric-Marjanovic, G.
AU  - Dondur, Vera
AU  - Milojević, M.
AU  - Mojović, Miloš
AU  - Mentus, Slavko
AU  - Radulović, Aleksandra
AU  - Vuković, Zorica
AU  - Stejskal, J.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/568
AB  - Self-assembled conducting, paramagnetic polyaniline nanotubes have been synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in aqueous medium in the presence of zeolite HZSM-5, without added acid. The influence of initial zeolite/aniline weight ratio on the conductivity, molecular and supramolecular structure, paramagnetic characteristics, thermal stability, and specific surface area of poly aniline/zeolite composites was studied. The conducting (∼10-2S cm-1), semiconducting (3 × 10-5 S cm-1), and nonconducting (5 × 10-9 S cm-1) composites are produced using the zeolite/aniline weight ratios 1, 5, and 10, respectively. The coexistence of polyaniline nanotubes, which have a typical outer diameter of 70-170 nm and an inner diameter of 5-50 nm, accompanied by nanorods with a diameter of 60-100 nm and polyaniline/zeolite mesoporous aggregates, distinct from the morphology of mieroporous zeolite HZSM-5, was proved in the conducting nanocomposite by scanning and transmission electron microscopies. FTIR spectroscopy confirmed the presence of polyaniline in the form of conducting emeraldine salt and suggested significant interaction of polyaniline with zeolite. The evolution of molecular and supramolecular structure of polyaniline in the presence of zeolite was discussed.
T2  - Langmuir
T1  - Synthesis and characterization of conducting self-assembled polyaniline nanotubes/zeolite nanocomposite
VL  - 25
IS  - 5
SP  - 3122
EP  - 3131
DO  - 10.1021/la8030396
ER  - 

@article{
author = "Ciric-Marjanovic, G. and Dondur, Vera and Milojević, M. and Mojović, Miloš and Mentus, Slavko and Radulović, Aleksandra and Vuković, Zorica and Stejskal, J.",
year = "2009",
abstract = "Self-assembled conducting, paramagnetic polyaniline nanotubes have been synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in aqueous medium in the presence of zeolite HZSM-5, without added acid. The influence of initial zeolite/aniline weight ratio on the conductivity, molecular and supramolecular structure, paramagnetic characteristics, thermal stability, and specific surface area of poly aniline/zeolite composites was studied. The conducting (∼10-2S cm-1), semiconducting (3 × 10-5 S cm-1), and nonconducting (5 × 10-9 S cm-1) composites are produced using the zeolite/aniline weight ratios 1, 5, and 10, respectively. The coexistence of polyaniline nanotubes, which have a typical outer diameter of 70-170 nm and an inner diameter of 5-50 nm, accompanied by nanorods with a diameter of 60-100 nm and polyaniline/zeolite mesoporous aggregates, distinct from the morphology of mieroporous zeolite HZSM-5, was proved in the conducting nanocomposite by scanning and transmission electron microscopies. FTIR spectroscopy confirmed the presence of polyaniline in the form of conducting emeraldine salt and suggested significant interaction of polyaniline with zeolite. The evolution of molecular and supramolecular structure of polyaniline in the presence of zeolite was discussed.",
journal = "Langmuir",
title = "Synthesis and characterization of conducting self-assembled polyaniline nanotubes/zeolite nanocomposite",
volume = "25",
number = "5",
pages = "3122-3131",
doi = "10.1021/la8030396"
}

Ciric-Marjanovic, G., Dondur, V., Milojević, M., Mojović, M., Mentus, S., Radulović, A., Vuković, Z.,& Stejskal, J.. (2009). Synthesis and characterization of conducting self-assembled polyaniline nanotubes/zeolite nanocomposite. in Langmuir, 25(5), 3122-3131.
https://doi.org/10.1021/la8030396

Ciric-Marjanovic G, Dondur V, Milojević M, Mojović M, Mentus S, Radulović A, Vuković Z, Stejskal J. Synthesis and characterization of conducting self-assembled polyaniline nanotubes/zeolite nanocomposite. in Langmuir. 2009;25(5):3122-3131.
doi:10.1021/la8030396 .

Ciric-Marjanovic, G., Dondur, Vera, Milojević, M., Mojović, Miloš, Mentus, Slavko, Radulović, Aleksandra, Vuković, Zorica, Stejskal, J., "Synthesis and characterization of conducting self-assembled polyaniline nanotubes/zeolite nanocomposite" in Langmuir, 25, no. 5 (2009):3122-3131,
https://doi.org/10.1021/la8030396 . .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Terlecki-Baričević, Ana V.
AU  - Karanovic, Lj.
AU  - Kirilov-Stefanov, P.
AU  - Zdujić, Miodrag
AU  - Dondur, Vera
AU  - Paneva, Daniela
AU  - Mitov, I.
AU  - Rakić, Vesna M.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/399
AB  - Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  LT  MF series  LT  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation
VL  - 79
IS  - 2
SP  - 186
EP  - 198
DO  - 10.1016/j.apcatb.2007.10.022
ER  - 

@article{
author = "Petrović, Srđan and Terlecki-Baričević, Ana V. and Karanovic, Lj. and Kirilov-Stefanov, P. and Zdujić, Miodrag and Dondur, Vera and Paneva, Daniela and Mitov, I. and Rakić, Vesna M.",
year = "2008",
abstract = "Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  LT  MF series  LT  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation",
volume = "79",
number = "2",
pages = "186-198",
doi = "10.1016/j.apcatb.2007.10.022"
}

Petrović, S., Terlecki-Baričević, A. V., Karanovic, Lj., Kirilov-Stefanov, P., Zdujić, M., Dondur, V., Paneva, D., Mitov, I.,& Rakić, V. M.. (2008). LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental
Elsevier., 79(2), 186-198.
https://doi.org/10.1016/j.apcatb.2007.10.022

Petrović S, Terlecki-Baričević AV, Karanovic L, Kirilov-Stefanov P, Zdujić M, Dondur V, Paneva D, Mitov I, Rakić VM. LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental. 2008;79(2):186-198.
doi:10.1016/j.apcatb.2007.10.022 .

Petrović, Srđan, Terlecki-Baričević, Ana V., Karanovic, Lj., Kirilov-Stefanov, P., Zdujić, Miodrag, Dondur, Vera, Paneva, Daniela, Mitov, I., Rakić, Vesna M., "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation" in Applied Catalysis B-Environmental, 79, no. 2 (2008):186-198,
https://doi.org/10.1016/j.apcatb.2007.10.022 . .

TY  - JOUR
AU  - Novaković, Tatjana
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Dondur, Vera
AU  - Mitrić, Miodrag
AU  - Randjelović, Danijela
AU  - Stoychev, Dimitar
AU  - Stefanov, Plamen
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/388
AB  - Active porous alumina coatings were obtained by deposition of boehmite sol on stainless steel (SS) substrate by spray pyrolysis method. The temperature and the doping of polyethylene glycol (PEG) and La3+ in the boehmite sol effects on the textural and structural properties and surface morphology of alumina coatings on stainless steel samples are presented. It was found that the addition of polyethylene glycol combined with La3+ to the boehmite sol before spraying improves the thermal stability of porous alumina coatings. X-ray diffraction patterns of a doped sample, even after 5 h at 1000 degrees C, point out to the presence only of delta-Al2O3, with a S-BET of 74 m(2)/g. XPS data and SEM photographs of coated samples show that alumina were well deposited on the metallic supports. The absence of any lanthanum compounds indicates very well homogeneous dispersion of La3+-ions on the surface of alumina crystallites. AFM images show sphere like alumina grains and agglomerates with surface roughness from 60 to 180 nm, depending on temperature and doping. Surface roughness of doped alumina samples was higher than that of non-doped. It was pointed out that spray pyrolysis method enables preparation of alumina layers with relatively high specific surface area, suitable for applications as catalysts supports.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis
VL  - 255
IS  - 5
SP  - 3049
EP  - 3055
DO  - 10.1016/j.apsusc.2008.08.074
ER  - 

@article{
author = "Novaković, Tatjana and Radić, Nenad and Grbić, Boško and Dondur, Vera and Mitrić, Miodrag and Randjelović, Danijela and Stoychev, Dimitar and Stefanov, Plamen",
year = "2008",
abstract = "Active porous alumina coatings were obtained by deposition of boehmite sol on stainless steel (SS) substrate by spray pyrolysis method. The temperature and the doping of polyethylene glycol (PEG) and La3+ in the boehmite sol effects on the textural and structural properties and surface morphology of alumina coatings on stainless steel samples are presented. It was found that the addition of polyethylene glycol combined with La3+ to the boehmite sol before spraying improves the thermal stability of porous alumina coatings. X-ray diffraction patterns of a doped sample, even after 5 h at 1000 degrees C, point out to the presence only of delta-Al2O3, with a S-BET of 74 m(2)/g. XPS data and SEM photographs of coated samples show that alumina were well deposited on the metallic supports. The absence of any lanthanum compounds indicates very well homogeneous dispersion of La3+-ions on the surface of alumina crystallites. AFM images show sphere like alumina grains and agglomerates with surface roughness from 60 to 180 nm, depending on temperature and doping. Surface roughness of doped alumina samples was higher than that of non-doped. It was pointed out that spray pyrolysis method enables preparation of alumina layers with relatively high specific surface area, suitable for applications as catalysts supports.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis",
volume = "255",
number = "5",
pages = "3049-3055",
doi = "10.1016/j.apsusc.2008.08.074"
}

Novaković, T., Radić, N., Grbić, B., Dondur, V., Mitrić, M., Randjelović, D., Stoychev, D.,& Stefanov, P.. (2008). The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis. in Applied Surface Science
Elsevier., 255(5), 3049-3055.
https://doi.org/10.1016/j.apsusc.2008.08.074

Novaković T, Radić N, Grbić B, Dondur V, Mitrić M, Randjelović D, Stoychev D, Stefanov P. The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis. in Applied Surface Science. 2008;255(5):3049-3055.
doi:10.1016/j.apsusc.2008.08.074 .

Novaković, Tatjana, Radić, Nenad, Grbić, Boško, Dondur, Vera, Mitrić, Miodrag, Randjelović, Danijela, Stoychev, Dimitar, Stefanov, Plamen, "The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis" in Applied Surface Science, 255, no. 5 (2008):3049-3055,
https://doi.org/10.1016/j.apsusc.2008.08.074 . .

TY  - CONF
AU  - Nedić, B.
AU  - Dondur, Vera
AU  - Kremenović, Aleksandar
AU  - Dimitrijević, R.
AU  - Antić, Bratislav
AU  - Blanuša, J.
AU  - Vasiljević-Radović, Dana
AU  - Stoiljković, Milovan
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/353
AB  - Yb3+-doped Ba and Sr diphyllosilicates (hexacelsians) have been synthesized using the Na form of LTA zeolite by ion-exchange procedure and thermal treatment. The crystal structures of both doped samples are refined and described in this article. The results of Rietveld refinements clearly indicate that Yb3+ ions are incorporated into the hexacelsians structure. AFM photomicrographs show round-shaped particles with the size of few microns. The magnetization measurements were done within the 2-300 K temperature range, revealing an enhancement of magnetization with temperature that is not in accordance with simple paramagnetic behavior.
PB  - Maik Nauka/Interperiodica/Springer, New York
C3  - Russian Journal of Physical Chemistry A
T1  - Yb3+ doped dyphillosilicates prepared by thermally induced phase transformation of zeolites
VL  - 81
IS  - 9
SP  - 1413
EP  - 1417
DO  - 10.1134/S0036024407090129
ER  - 

@conference{
author = "Nedić, B. and Dondur, Vera and Kremenović, Aleksandar and Dimitrijević, R. and Antić, Bratislav and Blanuša, J. and Vasiljević-Radović, Dana and Stoiljković, Milovan",
year = "2007",
abstract = "Yb3+-doped Ba and Sr diphyllosilicates (hexacelsians) have been synthesized using the Na form of LTA zeolite by ion-exchange procedure and thermal treatment. The crystal structures of both doped samples are refined and described in this article. The results of Rietveld refinements clearly indicate that Yb3+ ions are incorporated into the hexacelsians structure. AFM photomicrographs show round-shaped particles with the size of few microns. The magnetization measurements were done within the 2-300 K temperature range, revealing an enhancement of magnetization with temperature that is not in accordance with simple paramagnetic behavior.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Yb3+ doped dyphillosilicates prepared by thermally induced phase transformation of zeolites",
volume = "81",
number = "9",
pages = "1413-1417",
doi = "10.1134/S0036024407090129"
}

Nedić, B., Dondur, V., Kremenović, A., Dimitrijević, R., Antić, B., Blanuša, J., Vasiljević-Radović, D.,& Stoiljković, M.. (2007). Yb3+ doped dyphillosilicates prepared by thermally induced phase transformation of zeolites. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 81(9), 1413-1417.
https://doi.org/10.1134/S0036024407090129

Nedić B, Dondur V, Kremenović A, Dimitrijević R, Antić B, Blanuša J, Vasiljević-Radović D, Stoiljković M. Yb3+ doped dyphillosilicates prepared by thermally induced phase transformation of zeolites. in Russian Journal of Physical Chemistry A. 2007;81(9):1413-1417.
doi:10.1134/S0036024407090129 .

Nedić, B., Dondur, Vera, Kremenović, Aleksandar, Dimitrijević, R., Antić, Bratislav, Blanuša, J., Vasiljević-Radović, Dana, Stoiljković, Milovan, "Yb3+ doped dyphillosilicates prepared by thermally induced phase transformation of zeolites" in Russian Journal of Physical Chemistry A, 81, no. 9 (2007):1413-1417,
https://doi.org/10.1134/S0036024407090129 . .

TY  - CONF
AU  - Dondur, Vera
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Drofenik, M.
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/278
AB  - In this paper the adsorption and oxidation of CO on nanocrystalline Au/γ-Fe2O3, Au/α-Fe2O3, γ-Fe2O3 and a series of mixed ferrite with Mn xZn1-xFe2O4 composition are investigated. The catalysts were prepared by co-precipitation method and characterized using X-ray diffraction (XRPD), specific surface (BET), transition electron spectroscopy (TEM) and magnetization measurements. A temperature programmed desorption (TPD) study of the water and CO interaction with nanocrystalline adsorbents is presented. The catalytic activities towards CO oxidation increased in the following order: γ-Fe2O3 < MnxZn1-xFe2O4 < Au/γ-Fe2O3.
C3  - Materials Science Forum
T1  - A study of water influence on carbon monoxide adsorption and oxidation on nanocrystals of: γ-Fe2O3, Au/Fe2O 3 and MnxZn1-xFe2O4
VL  - 518
SP  - 85
EP  - 90
DO  - 10.4028/www.scientific.net/MSF.518.85
ER  - 

@conference{
author = "Dondur, Vera and Radić, Nenad and Grbić, Boško and Drofenik, M.",
year = "2006",
abstract = "In this paper the adsorption and oxidation of CO on nanocrystalline Au/γ-Fe2O3, Au/α-Fe2O3, γ-Fe2O3 and a series of mixed ferrite with Mn xZn1-xFe2O4 composition are investigated. The catalysts were prepared by co-precipitation method and characterized using X-ray diffraction (XRPD), specific surface (BET), transition electron spectroscopy (TEM) and magnetization measurements. A temperature programmed desorption (TPD) study of the water and CO interaction with nanocrystalline adsorbents is presented. The catalytic activities towards CO oxidation increased in the following order: γ-Fe2O3 < MnxZn1-xFe2O4 < Au/γ-Fe2O3.",
journal = "Materials Science Forum",
title = "A study of water influence on carbon monoxide adsorption and oxidation on nanocrystals of: γ-Fe2O3, Au/Fe2O 3 and MnxZn1-xFe2O4",
volume = "518",
pages = "85-90",
doi = "10.4028/www.scientific.net/MSF.518.85"
}

Dondur, V., Radić, N., Grbić, B.,& Drofenik, M.. (2006). A study of water influence on carbon monoxide adsorption and oxidation on nanocrystals of: γ-Fe2O3, Au/Fe2O 3 and MnxZn1-xFe2O4. in Materials Science Forum, 518, 85-90.
https://doi.org/10.4028/www.scientific.net/MSF.518.85

Dondur V, Radić N, Grbić B, Drofenik M. A study of water influence on carbon monoxide adsorption and oxidation on nanocrystals of: γ-Fe2O3, Au/Fe2O 3 and MnxZn1-xFe2O4. in Materials Science Forum. 2006;518:85-90.
doi:10.4028/www.scientific.net/MSF.518.85 .

Dondur, Vera, Radić, Nenad, Grbić, Boško, Drofenik, M., "A study of water influence on carbon monoxide adsorption and oxidation on nanocrystals of: γ-Fe2O3, Au/Fe2O 3 and MnxZn1-xFe2O4" in Materials Science Forum, 518 (2006):85-90,
https://doi.org/10.4028/www.scientific.net/MSF.518.85 . .

TY  - CHAP
AU  - Jovanović, Dušan M.
AU  - Dondur, Vera T.
AU  - Terlecki-Baričević, Ana V.
AU  - Grbić, Boško
PY  - 1991
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4366
AB  - Single phase perovskites, as LaCoO3, LaCrO3, La Co0 5 Cr0 5O3, La0.7Sr0 3CrO3 and La0 7Sr0 3Cr0 95Ru0 05O3, were synthesized and three-way activity and sulfur tolerance were measured in a pulse-flame catalyst testing system in a wide range of redox-potential (R). Comparison of activities indicates that perovskite with ruthenium ion has the best redox behaviour in the redox potential interval 0.75<R<1.40. On the basis of experimental data, the sulfur resistant matrix La0.7Sr0.3 CrO3 was synthetized and the highly active sulfur resistant ruthenium perovskite catalyst, was prepared.
PB  - Elsevier
T2  - Studies in Surface Science and Catalysis - Catalysis and Automotive Pollution Control II
T1  - Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites
VL  - 71
IS  - C
SP  - 371
EP  - 379
DO  - 10.1016/S0167-2991(08)62989-4
ER  - 

@inbook{
author = "Jovanović, Dušan M. and Dondur, Vera T. and Terlecki-Baričević, Ana V. and Grbić, Boško",
year = "1991",
abstract = "Single phase perovskites, as LaCoO3, LaCrO3, La Co0 5 Cr0 5O3, La0.7Sr0 3CrO3 and La0 7Sr0 3Cr0 95Ru0 05O3, were synthesized and three-way activity and sulfur tolerance were measured in a pulse-flame catalyst testing system in a wide range of redox-potential (R). Comparison of activities indicates that perovskite with ruthenium ion has the best redox behaviour in the redox potential interval 0.75<R<1.40. On the basis of experimental data, the sulfur resistant matrix La0.7Sr0.3 CrO3 was synthetized and the highly active sulfur resistant ruthenium perovskite catalyst, was prepared.",
publisher = "Elsevier",
journal = "Studies in Surface Science and Catalysis - Catalysis and Automotive Pollution Control II",
booktitle = "Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites",
volume = "71",
number = "C",
pages = "371-379",
doi = "10.1016/S0167-2991(08)62989-4"
}

Jovanović, D. M., Dondur, V. T., Terlecki-Baričević, A. V.,& Grbić, B.. (1991). Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites. in Studies in Surface Science and Catalysis - Catalysis and Automotive Pollution Control II
Elsevier., 71(C), 371-379.
https://doi.org/10.1016/S0167-2991(08)62989-4

Jovanović DM, Dondur VT, Terlecki-Baričević AV, Grbić B. Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites. in Studies in Surface Science and Catalysis - Catalysis and Automotive Pollution Control II. 1991;71(C):371-379.
doi:10.1016/S0167-2991(08)62989-4 .

Jovanović, Dušan M., Dondur, Vera T., Terlecki-Baričević, Ana V., Grbić, Boško, "Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites" in Studies in Surface Science and Catalysis - Catalysis and Automotive Pollution Control II, 71, no. C (1991):371-379,
https://doi.org/10.1016/S0167-2991(08)62989-4 . .