Relationship between photocatalytic activity and platinum concentration of titanium oxide powder

Abstract

Pt-deposited TiO2 powder was prepared by impregnation method and heated at 400°C for 1h. Pt on TiO2 powder was confirmed by EDX of powder samples. The sample was placed in CH3OH solution and exposed to 365 nm light. The gases generated were found to contain H2 gas. Amount of gases generated for Pt-deposited TiO2 is greater than that for TiO2 without Pt. However, it decreases with increasing Pt concentration in the area where the concentration of Pt is high. The potoelectrochemical reaction was very sensitive to the concentration of Pt on TiO2.