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, Ji-Chao

机构：[1] College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang, 453000, China; [2] College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China; [3] College of Chemical Engineering and Materials, Zhengzhou University of Light Industry, Zhengzhou, 450000, China; [4] College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450052, China

第一机构：新乡学院化学化工学院

通讯机构：[2]College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China

年份：2020

卷号：830

外文期刊名：Journal of Alloys and Compounds

收录：EI(收录号：20201108300157);Scopus(收录号：2-s2.0-85081339804)

语种：英文

外文关键词：Architecture - Carbon dioxide - Catalyst selectivity - Copper oxides - Heterojunctions - Oxide minerals - X ray photoelectron spectroscopy

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 CH4 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 μmol 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 CO2 reduction. ? 2020 Elsevier B.V.