期刊
NANO ENERGY
卷 89, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106349
关键词
Hydrogen generation; Piezotronic effect; Z-scheme heterostructure; Benzylamine; Multi-field catalysis
类别
资金
- Xing Liao Talents Program'' Project [XLYC1902051]
- Key Project of the National Ministry of Science and Technology [2016YFC0204204]
- Major Program of the National Natural Science Foundation of China [21590813]
- National Natural Science Foundation of China [22076018, 21377015, 21577012]
- Program of Introducing Talents of Discipline to Universities [B13012]
- Fundamental Research Funds for the Central Universities [DUT19LAB10]
- Key Laboratory of Industrial Ecology and Environmental Engineering, China Ministry of Education
- State Key Laboratory of Catalysis in DICP [N-20-06]
Photocatalytic hydrogen generation is a potential approach to address global energy and environmental issues, but faces challenges of low separation efficiency and slow kinetics. By constructing the BaTiO3@ZnIn2S4 heterostructure with Z-scheme electron transfer paths, high photocatalytic activity was achieved.
Photocatalytic hydrogen generation represents a potential approach to address global energy and environmental issues for artificial photosynthesis. Generally, the inevitable use of the holes scavengers leads to increased cost and production of waste. The integration of H-2-producing half-reaction with value-added organic molecule oxidation reaction provides a promising strategy to cope with this issue. However, owing to the low separation efficiency of photo-generated charge carriers and sluggish kinetics of the surface reaction, the photocatalytic activity without a co-catalyst is unsatisfying. Herein, the hierarchical and piezoelectric Z-scheme BaTiO3@Z-nIn(2)S(4) heterostructure without any co-catalyst were dexterously constructed. The Z-scheme electron transfer paths maintain the strong redox ability of the photo-generated electrons and holes, also offer spatial separation of both charge carriers and the surface redox regions. The well-designed redox regions endow BaTiO3@ZnIn2S4 with the lowest energy barriers of hydrogen production and C-N coupling of benzylamine than that of pure BaTiO3 or ZnIn2S4. Significantly, piezotronic effect can further accelerate the separation and transfer of photo generated charge carriers in Z-scheme BaTiO3@ZnIn2S4 heterostructure. Thus, by the feat of the multiple advantages of the piezotronic effect and Z-scheme heterostructure, the high photocatalytic activity for the coproduction of C-N coupling products (5593 umol g(-1)) and H-2 (8041 umol g(-1)) was achieved through coupling utilization of mechanical energy and solar energy.
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