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

被引:51
作者
Hamdy, Mohamed S. [1 ,2 ]
Amrollahi, Rezvaneh [1 ]
Sinev, Ilya [3 ]
Mei, Bastian [3 ]
Mul, Guido [1 ]
机构
[1] Univ Twente, Fac Sci & Technol, Photocatalyt Synth Grp, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
[2] Helwan Univ, Fac Sci, Dept Chem, Cairo, Egypt
[3] Ruhr Univ Bochum, Lab Ind Chem, D-44780 Bochum, Germany
关键词
MESOPOROUS SILICA; CARBON-DIOXIDE; GASEOUS FORMALDEHYDE; SELECTIVE OXIDATION; GOLD NANOPARTICLES; ZINC-OXIDE; TIO2; TITANIA; MCM-41; PHOTOREDUCTION;
D O I
10.1021/ja410363v
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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).
引用
收藏
页码:594 / 597
页数:4
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