ИСТИНА

Recently we have found that annealing of the [TiOx(O2)2–x(H2O)m] phase produced by treating titanyl sulfate with various peroxo compounds (hydrogen peroxide, ammonium persulfate, or urea hydrogen peroxide) results in formation of titanium dioxide [1]. The purpose of the work was to use the [TiOx(O2)2–x(H2O)m] phase for preparing coatings on glass and aluminum. Coatings on glass were prepared by deposition of the polymeric titanium complex containing urea and/or peroxo bridging ligands followed by annealing. Coatings on aluminum were prepared by anodizing an aluminum sample in the solution containing 20% H2SO4, 5% glycerin, 5% lactic acid, and [TiOx(O2)2–x(H2O)m] (0.125 A/cm2 , 10–15 min). The resulting coatings were characterized by X-ray diffraction and IR spectroscopy. They demonstrate good mechanical properties and chemical stability. Thin films containing nanocrystalline anatase show high photocatalytic activity in the model reaction of Methyl Orangs discoloration. Therefore, [TiOx(O2)2–x(H2O)m] is a promising precursor for manufacturing nanostructured thin-film coatings.