, Volume 45, Issue 10, pp 1146-1152

Fabrication and properties of SiO2/TiO2 composites

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Composites in the form of precipitated powders, hybrid xerogels, and SiO2 core/TiO2 shell particles have been produced via hydrolysis of precursors (alkoxides and inorganic derivatives of titanium and silicon) and have been characterized by differential thermal analysis, X-ray diffraction, adsorption measurements, and macroelectrophoresis. The results demonstrate that heat treatment of the composites leads to crystallization of the titanium-containing component and, accordingly, reduces their specific surface area. Hydrothermal treatment enables the fabrication of materials in which TiO2 nanocrystals are evenly distributed over an amorphous SiO2 matrix.

Original Russian Text © A.N. Murashkevich, A.S. Lavitskaya, O.A. Alisienok, I.M. Zharskii, 2009, published in Neorganicheskie Materialy, 2009, Vol. 45, No. 10, pp. 1223–1229.