Investigation of the Photolytic Activity of СеО2–TiO2 Nanocompositions Obtained with the Help of Sol-Gel Procedure from Inorganic Salts
V. S. GURIN1, N. M. BOBKOVA2, E. E. TRUSOVA2
1Research Institute for Physical Chemical Problems of the Belarusian State University, Ul. Leningradskaya 14, Minsk 220030, Belarus
2Belarusian State Technological University, Ul. Sverdlova 13a, Minsk 220006, Belarus
Keywords: photocatalysis, titanium dioxide, cerium dioxide, phase composition, nanocomposites, reflection spectra
Abstract
Photocatalytically active nanocompositions CeO2-TiO2 were prepared by means of sol-gel procedure from inorganic salts with different СеО2/TiO2 ratios. According to the data of X-ray phase analysis and optical reflection spectroscopy, in the case of CeO2 content 5 mol. % and more, nanoparticles with fluorite-type lattice (CeO2) are formed; the lattice spacing decreases with the insertion of titanium. In the case of low CeO2 content (1 mol. %) TiO2 nanoparticles are formed (anatase). Their optical properties are modified in the subsurface region. The obtained nanocompositions exhibit higher photocatalytic activity in comparison with individual oxides TiO2 and СеО2, and can be used to develop the systems of photocatalytic purification.
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