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WUT’s latest research findings of Professor Zhang Gaoke's Research Group are reported by JACS

  

  Recently, the latest research findings “Photocatalytic CO2conversion of M0.33WO3directly from the air with high selectivity: insight into full spectrum-induced reaction mechanism”(J. Am. Chem. Soc., 2019, DOI: 10.1021/jacs.8b12928) by Zhang Gaoke, the chief professor of School of Resources and Environmental Engineering and State Key Laboratory of Silicate Materials for Architectures, and Wu Xiaoyong, one of the associate professors in Zhang’s research group are published online in the Journal of the American Chemical Society, a top international journal in the field of chemistry.

  In recent years, the energy crisis and greenhouse effect have increasingly become two major problems in the world. As a green and environment-friendly technology, photocatalysis can directly convert CO2 into high-value-added fuel needed by the community, thus becoming one of the effective solutions to address such problems in the globe. However, how to directly convert CO2 with low concentration in the atmosphere into a single high-value-added fuel has become a challenge in the field of photocatalytic reduction of CO2by effectively utilizing ultraviolet, visible and near-infrared lights in the solar light at normal temperature and pressure.

  The alkali tungsten bronze photocatalysis material developed by Professor Zhang Gaoke and associate professor Wu Xiaoyong, a member of the team, provides a new way of thinking in the realization of directly reducing CO2 with low concentration in the air into a single high-value-added fuel by utilizing ultraviolet, visible and near-infrared lights in the solar light at normal temperature and pressure. Tungsten bronze MxWO3, rich in unsaturated W5+ and alkali metal ions, was produced by special “water-controllable releasing” solvothermal method, which can convert CO2 in the air into methanol (CH3OH) with a single component at normal temperature and pressure and under the irradiation of ultraviolet, visible and near-infrared lights. In particular, after 4 h near-infrared light irradiation, ca 4.32% of CO2 in the air could be converted into CH3OH up to 98%selectivity. More interestingly, in the continuously flowing air atmosphere, the alkali tungsten bronze MxWO3 still maintains excellent CO2 reduction effect, and the product is still CH3OH with single component. The experiments and theoretical calculations unveiled that the rich unsaturated W5+ in the crystal structure of MxWO3 and alkali metal ions occupied in the tunnel of hexagonal structure make MxWO3 have a very unique electronic structure, which can enhance the polar on transition, selectively adsorb CO2 rather than O2 from the air, decrease the activation energy of CO2 reaction, and finally make the effective CO2 reduction in the air a reality. This work may provide a new possibility for the practical application of artificial photosynthesis.
  

 

  

  Journal of the American Chemical Society is one of the top journals in the field of chemistry with influence factor of 14.325, which mainly reports the important research results of chemistry and its related cross disciplines. The first authors of the paper are Wu Xiaoyong, associate professor of WUT and Li Yuan, doctoral student of WUT, Professor Zhang Gaokeis as the first corresponding author, and Professor Zhao Yan from WUT and Professor Sun Yongfu from Chinese Academy of Sciences have carried out cooperative research including calculation and experimental data testing and analysis on such areas respectively as co-corresponding authors. This project receives funding from projects of the National Natural Science Foundation (No.51472194,No. 21777045 and No.51602237) and the research program of National “973” Plan (2013CB632402).