Hydrothermal synthesis of TiO2/WO3 compositions and their photocatalytic activity

Photocatalytic activity, optical properties, thermal stability, phase patterns and morphology of nano-size ТiО 2 /WO 3 compositions obtained from organic precursors through hydrothermal synthesis have been studied. It has been shown that doping of anatase nanoparticles with tungsten W +6 results in particle diameter reduction from 35 to 10 nm; decrease in width of the band gap from 3.15 eV to 2.91 eV and increase in temperature of phase transition of anatase to rutile up to 980 о С. Catalytic activity of ТiО 2 /WO 3 (4 mol.%) composition under photochemical methylene blue (MB) oxidation by simulated solar light exceeds that of undoped anatase (obtained in the same way) 6-fold.