The reduction of commercial and mechanochemically processed CeO2 powders was studied. Nanostructured CeO2, with the crystallite size of 21 nm and the lattice distortion of 0.37%, was obtained during 60 min of milling in a high-energetic vibratory mill. X-ray diffraction, scanning electron microscopy and Brunauer-Emmett-Teller method were applied to characterize the milled powders. During the thermal treatment at 1200 and 1400 degrees C in an argon atmosphere the nonstoichiometric CeO2-x oxides with the defect fluorite structure were formed. Compositions of CeO2-x oxides were determined according to its lattice parameter. The results showed that the release of oxygen, as well as the rate of reduction, was more effective in nanocrystalline then in the microcrystalline CeO2, producing at 1200 degrees C Ce-1.80 and CeO1.85 oxides, while at 1400 degrees C were obtained similarly, CeO1.77 and CeO1.78, compositions. (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Кључне речи:
A. Milling / B. X-ray methods / D. CeO2 / Nanostructure
TY - JOUR
AU - Zec, Slavica
AU - Bošković, Snežana B.
AU - Kaluđerović, Branka V.
AU - Bogdanov, Žarko
AU - Popovic, Nada
PY - 2009
UR - https://vinar.vin.bg.ac.rs/handle/123456789/3592
AB - The reduction of commercial and mechanochemically processed CeO2 powders was studied. Nanostructured CeO2, with the crystallite size of 21 nm and the lattice distortion of 0.37%, was obtained during 60 min of milling in a high-energetic vibratory mill. X-ray diffraction, scanning electron microscopy and Brunauer-Emmett-Teller method were applied to characterize the milled powders. During the thermal treatment at 1200 and 1400 degrees C in an argon atmosphere the nonstoichiometric CeO2-x oxides with the defect fluorite structure were formed. Compositions of CeO2-x oxides were determined according to its lattice parameter. The results showed that the release of oxygen, as well as the rate of reduction, was more effective in nanocrystalline then in the microcrystalline CeO2, producing at 1200 degrees C Ce-1.80 and CeO1.85 oxides, while at 1400 degrees C were obtained similarly, CeO1.77 and CeO1.78, compositions. (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2 - Ceramics International
T1 - Chemical reduction of nanocrystalline CeO2
VL - 35
IS - 1
SP - 195
EP - 198
DO - 10.1016/j.ceramint.2007.10.031
ER -
@article{
author = "Zec, Slavica and Bošković, Snežana B. and Kaluđerović, Branka V. and Bogdanov, Žarko and Popovic, Nada",
year = "2009",
abstract = "The reduction of commercial and mechanochemically processed CeO2 powders was studied. Nanostructured CeO2, with the crystallite size of 21 nm and the lattice distortion of 0.37%, was obtained during 60 min of milling in a high-energetic vibratory mill. X-ray diffraction, scanning electron microscopy and Brunauer-Emmett-Teller method were applied to characterize the milled powders. During the thermal treatment at 1200 and 1400 degrees C in an argon atmosphere the nonstoichiometric CeO2-x oxides with the defect fluorite structure were formed. Compositions of CeO2-x oxides were determined according to its lattice parameter. The results showed that the release of oxygen, as well as the rate of reduction, was more effective in nanocrystalline then in the microcrystalline CeO2, producing at 1200 degrees C Ce-1.80 and CeO1.85 oxides, while at 1400 degrees C were obtained similarly, CeO1.77 and CeO1.78, compositions. (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Chemical reduction of nanocrystalline CeO2",
volume = "35",
number = "1",
pages = "195-198",
doi = "10.1016/j.ceramint.2007.10.031"
}
Zec, S., Bošković, S. B., Kaluđerović, B. V., Bogdanov, Ž.,& Popovic, N.. (2009). Chemical reduction of nanocrystalline CeO2. in Ceramics International, 35(1), 195-198.
https://doi.org/10.1016/j.ceramint.2007.10.031
Zec S, Bošković SB, Kaluđerović BV, Bogdanov Ž, Popovic N. Chemical reduction of nanocrystalline CeO2. in Ceramics International. 2009;35(1):195-198.
doi:10.1016/j.ceramint.2007.10.031 .
