Krasil’nikov, V. N. and Shtin, A. P. and Gyrdasova, O. I. and Baklanovach, I. V. (2008) Vanadyl and titanium glycolates as precursors for the preparation of oxide materials in the form of elongated microparticles and nanoparticles. Nanotechnologies in Russia, Volume 3 (1-2). pp. 106-111.
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This paper reports on the results of investigations of the optimum conditions for the formation and properties of vanadyl and titanium glycolates of the compositions VO(OCH2CH2O) and Ti(OCH2CH2O)2 with elongated crystals, as well as solid solutions of the composition Ti1?x V x (OCH2CH2O)2 (0 < x ? 0.13). New techniques are developed for synthesizing the compounds under investigation. These techniques are based on the interaction of the V2O5 nH2O, NH4VO3, VO(OH)2, and Ti(OH)4 compounds with ethylene glycol under heating. It is established that heat treatment of the VO(OCH2CH2O) compound in air results in the formation of whiskers of the compositions V2O4 (T ? 200°C) and V2O5(T ? 400°C) with a particle shape characteristic of the initial material. The appropriate treatment in an inert gas atmosphere leads to the formation of vanadium(III) oxide. Heating of the Ti(OCH2CH2O)2 and Ti1?x V x (OCH2CH2O)2 compounds in air results in the formation of TiO2 and Ti1?x V x O2 oxides with an anatase structure at temperatures T ? 400°C and a rutile structure at T ? 750°C; in this case, the needle or fiber shape of precursors is retained in the synthesized oxides.
|Subjects:||Physical Science > Nanophysics|
Material Science > Nanochemistry
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||19 Dec 2008 13:14|
|Last Modified:||01 Feb 2009 20:24|
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