Strategies to Design Efficient Silica-Supported Photocatalysts for Reduction of CO2

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• 作者：Mohamed S. Hamdy ; Rezvaneh Amrollahi ; Ilya Sinev ; Bastian Mei ; Guido Mul
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：January 15, 2014
• 年：2014
• 卷：136
• 期：2
• 页码：594-597
• 全文大小：265K
• ISSN：1520-5126

文摘

The photocatalytic reduction of CO₂ by water vapor to produce light hydrocarbons was studied over a series of catalysts consisting of variable loading of Ti incorporated in TUD-1 mesoporous silica, either modified by ZnO nanoparticles or isolated Cr-sites. Unexpectedly, the performance of ZnO-Ti-TUD-1 and Cr-Ti-TUD-1 was inferior to the parent Ti-TUD-1. An explanation can be found in experiments on the photocatalytic degradation of a mixture of hydrocarbons (i.e., CH₄, C₂H₄, C₂H₆, C₃H₆, and C₃H₈) under the same illumination conditions. Ti-TUD-1 exhibits the poorest activity in hydrocarbon degradation, while ZnO-Ti-TUD-1 and Cr-Ti-TUD-1 showed very significant degradation rates. This study clearly demonstrates the importance of evaluating hydrocarbon conversion over photocatalysts active in converting CO₂ to hydrocarbons (in batch reactors).