Efficient Photocatalytic CO2 Reduction over WO3 Nanoflakes supported Octahedral Cu2O Heterostructure
作者单位：College of Chemistry and Chemical Engineering Henan Institute of Science and Technology College of Chemistry and Chemical Engineering Xinxiang University
会议名称：《中国化学会第二届全国光功能材料青年学者研讨会》
会议日期：2020年
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学]
关 键 词：Cu2O Z scheme CO2 reduction Photocatalysis
摘 要：Hexagonal-phase WO3 nanosheet with dominant facets was synthesized by a solvothermal-calcination method, and CuO was composite and the electrodeposition method. The Cu O/WO-001 composite nanosheets exhibited an excellent photocatalytic CO reduction performance under visible irradiation(λ 400 nm). The yields of CO, O and H using Cu O/WO-001 photocatalysts reached 11.7, 5.7 and 0.7 μmol, respectively, after24 h visible-light illumination and the photocatalyst showed good photocatalytic activity in the fourth cycling *** enhanced photocatalytic activity was ascribed to the efficient separation of the photoinduced charges derived from the constructed heterojunction in the nanosheet composite. The(0 0 1) facet of hexagonal phase WO was in favor of the transfer between the photo-induced holes and the water molecules, conducing to H O oxidation in the CO reduction process. The indirect Z-scheme charge transfer mode of Cu O/WO was then demonstrated by measuring band structures and the potential mechanism of CO reduction is further proposed. The present research is expected to be useful in developing Z-scheme photocatalysts of WO-based nanosheet, and provides meaningful information for hopefully stimulating more insightful investigations of systematical design and controlled assembly of visible-light-driven photocatalysts.