PHOTOCATALYSIS ON Ti-Al BINARY METAL OXIDES: ENHANCEMENT OF THE PHOTOCATALYTIC ACTIVITY OF TiO2 SPECIES.

Article abstract of DOI:10.1021/j100313a039

Titanium-aluminum binary metal oxides prepared by coprecipitation have been used as photocatalysts for the hydrogenation reaction of propene with water and isomerization of cis-2-butene in the gas-solid system. Photocatalytic activity of TiO//2 species in the oxide was found to be significantly enhanced by forming surface layers where TiO//2 species are surrounded by Al//2O//3 carrier acting as cocatalyst. It is shown that the Ti-Al oxide catalyst consists of surface layers in which TiO//2 species are surrounded by Al//2O//3 carrier acting as cocatalyst, these structure resulting in the enhancement of the activity of TiO//2 species. In this situation, the photon energy absorbed by the oxide is utilized for the reaction with high efficiency due to the less efficient radiationless energy transfer on the surface with coordinatively unsaturated surface ions.