Professor Chen Hao's team and collaborators of Huazhong Agricultural University have made new progress in the field of energy and environmental photocatalysis

Recently, the research group of "advanced materials and green catalysis" led by Professor Chen Hao of the school of science of Huazhong Agricultural University has made progress in the field of energy and environmental photocatalysis The relevant achievements were published in the international journal Applied catalyst B: On environmental (DOI: 10.1016 / j.apcatb 2019.118088) The first author of the paper is Yang Xianglong, Associate Professor Wang Shengyao and Yang Nan, master student, Professor Chen Hao, Associate Professor Ding Xing and Professor Ye Jinhua of the National Institute of materials of Japan Artificial photosynthesis uses solar energy and photocatalyst to convert CO2 and H2O into high value-added hydrocarbons, which is the "Holy Grail" reaction in the field of solar energy conversion Among many photocatalytic materials, semiconductor materials with surface oxygen vacancy have attracted much attention due to their wide spectral absorption range, high carrier transport efficiency and strong ability to activate substrate molecules (source: Huazhong Agricultural University) however, the current research mainly focuses on the enhancement of photocatalytic activity of materials, and little attention is paid to the relationship between oxygen vacancy and CO2 selective conversion Based on this, Professor Chen Hao of Huazhong Agricultural University and Professor Ye Jinhua of the National Institute of materials of Japan worked together to explore the influence of oxygen vacancy on the path of CO 2 photocatalysis by using {001} crystal surface exposed Bi 2MoO 6 as the model material through theoretical calculation and experiment DFT theoretical calculation shows that the introduction of oxygen vacancy to the crystal surface of {001} will promote the adsorption of CO 2 on the surface of Bi 2MoO 6 in the form of b1-co 2, and mainly transform into CH 4 with high added value The results show that the rate of CO 2 reduction to CO / CH 4 by Bi 2MoO 6 is 0.27/2.01 μ mol g-1 H-1, and the selectivity to CH 4 is 96.7% Both the activity and CH 4 selectivity are better than that of Bi 2MoO 6, which can only produce Co In addition, the in-situ diffuse reflectance infrared spectrometer was used to monitor the conversion process of CO 2, the mechanism of CO 2 photocatalytic reduction was investigated, and the role of oxygen vacancy in the process of CO 2 selective photoreduction was revealed preliminarily, which has guiding significance for the design and synthesis of high activity and high selectivity Co 2 Photocatalyst The research was supported by NSFC, Hubei provincial fund and university independent innovation fund.