Estimation of Ti - Ta oxide system photocatalysts for water splitting synthesized by amorphous metal complex method

Abstract

Ternary oxides of Ca₆Ti₂Ta₈O₃₀, Sr₆Ti₂Ta₈O₃₀, Ba₆Ti₂Ta₈O₃₀, Sr₃Ti₄Ta₄O₂₁, Ba₃Ti₄Ta₄O₂₁, Ba₃Ti₅Ta_3.2O₂₁ characteristic for the simultaneous presence of Ti and Ta as constituents, were synthesized by amorphous metal complex (AMC) method. Samples loaded with Pt cocatalyst exhibited high H₂ generating activities over 1 mmol / h from MeOH – water mixed solution under UV irradiation. The optimization of calcinations condition and amount of Pt loaded led Ba₃Ti₄Ta₄O₂₁ to have a very high activity reaching 9.7 mmol / h.