Photocatalytic performance of Pt-loaded TiO 2 in the decomposition of gaseous ozone

Abstract

Gas-phase catalytic and photocatalytic decomposition of ozone (O 3) was investigated using TiO 2 and Pt-loaded TiO 2 (Pt/TiO 2) at room temperature and atmospheric pressure. The nominal weight loading of Pt was less than 1 wt.%. Results of this study indicate that both the overall conversion of O 3 to O 2 and other products with UV irradiation and without UV irradiation (dark reaction) can be improved by using Pt-loaded TiO 2. Photocatalytic conversion of O 3 on pure TiO 2 decreased with increasing water vapor. In contrast, Pt/TiO 2 was active for the decomposition of ozone under the humidity condition at room temperature.