Title: Photocatalytic reduction of carbon dioxide on nano titanium dioxide modified by palladium and tin
Abstract: Nano titanium dioxide modified by palladium and tin,denoted by Pd-SnO2/TiO2,was prepared by photochemical reduction of Pd2+ on the SnO2/TiO2 composite semiconductor support.Photocatalytic reduction of carbon dioxide was chosen as a probe reaction to investigate the performances of the photocatalyst,and the difference of photocatalytic behaviors between the Pd-SnO2/TiO2 and the SnO2/TiO2 modified by copper(CuOx-SnO2/TiO2) was discussed.The results showed that methanol was the only product in the reduction of carbon dioxide on Pd-SnO2/TiO2,however,three reduction products were detected when the reaction occured on CuOx-SnO2/TiO2.The difference in products indicates that the capability of photocatalytic reduction of Pd-SnO2/TiO2 is more powerful than that of CuOx-SnO2/TiO2.On the basis of the characterization results from XRD,XPS and TEM,the mechanism of photo-excitation on Pd-SnO2/TiO2 was discussed and a possible mechanism of carbon dioxide photocatalytic reduction was proposed.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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