The use of photocatalyst solar power is expected to be greatly enhanced

Xiong Yujie, Professor, University of Science and Technology of China Based on the precise preparation chemistry of inorganic solids, a class of tungsten oxide nanostructures with defect states were designed by using crystal defect engineering, which showed excellent performance in aerobic coupling catalysis under a broad spectrum of light conditions. Is expected to achieve low-energy and low-cost organic chemical technology. The result was published online July 11 in the journal American Chemical Society.

In today's organic chemical system, the vast majority of catalytic reactions are based on the use of noble metal catalysts and are driven by the combustion of petroleum and coal, which has the disadvantages of high cost of catalyst materials and high energy consumption. The metal oxide with the advantages of low cost, and show the photocatalytic activity, is an ideal class of catalytic material. However, the performance of metal oxides in oxygen molecule activation systems is unsatisfactory, failing to capture solar energy efficiently and transfer it to oxygen molecules.

Xiong Yujie task group in response to the challenge to design a class of precise controllable oxygen vacancy defects tungsten oxide nanostructures. Usually metal oxide metal atoms with the characteristics of the coordination saturation, can not be activated by chemical adsorption of oxygen molecules. The construction of oxygen vacancy defects overcomes this shortcoming and promotes the efficient transfer of photogenerated electrons from the oxide catalyst to oxygen molecules. On the other hand, the appearance of defect states greatly widens the absorption range of the photocatalyst and makes it capture solar energy in a wide range of visible and near-infrared regions. This realizes the effective capture of solar energy and transfer of energy transfer and solves the bottleneck of the oxide catalyst in the photocatalytic organic synthesis.

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