Photoreduction of CO2 using black TiO2 films under solar light

摘要: Black TiO2 films with unique porous structures have been successfully obtained in-situ on Ti plates by a simple hydrothermal treatment using H2O2 solution. The samples were used as photocatalysts to reduce CO2 under simulated sunlight irradiation at room temperature in the presence of H2O. excellent grid-like providing more active photocatalysis sites and exhibit extremely high photoreduction efficiency favourable selective formation CO CH4 (with highest production rates 115 12 μmol/g h, respectively) compared conventional (Degussa P25) (0.28 0.019 respectively). structural deviation from standard crystalline anatase existence substantial Ti3+ oxygen vacancies is critical factor for expanding absorbance into visible light region resulting photocatalytic performance irradiation.