文献类型：期刊文献

英文题名：Enhanced photocatalytic 3D/2D architecture for CO2 reduction over cuprous oxide octahedrons supported on hexagonal phase tungsten oxide nanoflakes

作者：Shi, Weina[1];Guo, Xiaowei[1];Wang, Ji-Chao[2,4];Li, Yu[3];Liu, Lu[2];Hou, Yuxia[2];Li, Ying[2];Lou, Huihui[2]

第一作者：史维娜

通讯作者：Wang, JC[1];Hou, YX[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China;[2]Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China;[3]Zhengzhou Univ Light Ind, Coll Chem Engn & Mat, Zhengzhou 450000, Peoples R China;[4]Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450052, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China.

年份：2020

卷号：830

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000525824700106)】；

基金：We would like to thank the financial supports of National Natural Science Foundation of China (No. 51802082 and 21307026), Key Scientific and Technological Project of Henan Province (No. 182102410094 and 192102310231), Key Scientific Research Project of Colleges and Universities in Henan Province (No. 19B150006), "Climbing" Project of Henan Institute of Science and Technology (No. 2018CG04 and 2018T02).

语种：英文

外文关键词：3D/2D architecture; Cu2O Octahedrons; CO2 reduction; Selectivity; WO3 nanoflakes

摘要：The 3D/2D architecture of Cu2O octahedrons/WO3 nanoflake were built on the substrate surface of fluorine-doped stannic oxide. The composite photocatalyst was composed by Cubic phase Cu2O/hexagonal phase WO3. The photoreduction CO2 activities of the composite samples were studied in the presence of water vapor. The yields and selection of CO and CH(4 )products were changed with deposited Cu2O. With the present of Cu2O octahedrons on the WO3 flake, the CH4 product appeared and the maximal CO and CH4 yields could attain 7.04 and 8.42 mu mol after 24 h of visible-light irradiation. The photostability and photoactivity of Cu2O for CO2 reduction were enhanced by the building of the WO3/Cu2O heterojuntion. The Type II band alignment for WO3/Cu2O heterojuntion was characterized by UV -Vis reflectance and value-band X-Ray photoelectron spectroscopy and the Z-scheme mechanism of photoinduced electron-hole was further proposed. This study could offer a new clue for designing Cu2O based heterojunction photocatalysts for CO(2 )reduction. (C) 2020 Elsevier B.V. All rights reserved.