期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 204, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.solmat.2019.110211
关键词
Photocatalyst; Hydrogen evolution; Z-scheme; Cuprous oxide; Multicomponent
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2018R1D1A1A09082239]
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2019M3E6A1066002]
- National Research Foundation of Korea [2018R1D1A1A09082239] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Multi-component photocatalysts have been considered as promising candidates to overcome fast charge recombination phenomena in solar water splitting process, which improve electron utilizations in reductive hydrogen generation. However, most reported multi-component systems have been rarely fabricated by aids with z-scheme type components. Thus, cuprous and cupric oxides are proposed as an excellent example for a z-scheme system with ZnO base materials. The ZnO particles are firstly synthesized by a precipitation method, and CuS components are added on the ZnO particle surfaces in various compositions. The ZnO/CuS materials are then thermally treated under controlled oxygen atmosphere to form cuprous and cupric oxides. To enhance photoactive electrons for reductive water splitting in conduction bands of the photocatalyst system, optimum content of cuprous oxides in the z-scheme components is a critical factor. At the optimum cuprous content (14.3%) in the copper oxides, the highest hydrogen production rate of 1092.5 mu molg(-1)h(-1) is achieved at about 3% apparent quantum yield under the standard solar irradiation.
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