Preparation And Characterization Of Visible-Light-Driven Agbr/Tio2 Towards Co2 Reduction Into Fuels

During the past several decades there have seen a significant rise in atmospheric carbon dioxide levels resulting from the combustion of hydrocarbon fuels, This investigation on AgBr/TiO2 preparation and characterization for CO2 reduction under visible light (lambda > 420 nm) was studied. The nano structured AgBr/TiO2 photocatalyst was prepared by the deposition-precipitation method in the presence of cetyltrimethylammonium bromide (CTAB), and characterized by X-ray diffraction (XRD), diffuse reflectance spectra (DRS) and transmission electron microscopy (TEM). Their photocatalytic activities were evaluated by the reduction yield in the presence of CO2 and water (not given here). The highly efficiently photocatalytic activities of AgBr/TiO2 in the reduction process of CO2 is attributed to its strong absorption in the visible-light region. In addition, it was found that AgBr/TiO2 photocatalyst was stable in the repeated uses under visible light irradiation, due to the transfer of photoexeited electrons from the conduction band of well dispersed AgBr to that of TiO2.