Photocatalytic performance of Pt-loaded TiO2 in the decomposition of gaseous ozone

Gas-phase catalytic and photocatalytic decomposition of ozone (O3) was investigated using TiO2 and Pt-loaded TiO2 (Pt/TiO2) 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 O3 to O2 and other products with UV irradiation and without UV irradiation (dark reaction) can be improved by using Pt-loaded TiO2. Photocatalytic conversion of O3 on pure TiO2 decreased with increasing water vapor. In contrast, Pt/TiO2 was active for the decomposition of ozone under the humidity condition at room temperature.