期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 253, 期 -, 页码 379-390出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2019.04.008
关键词
ZnO/ZnS nanobranches; Cu(OH)(2) clusters; Hydrogen evolution; Visible-light irradiation; Photocatalysis
资金
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- National Natural Science Foundation of China [51776094, 51406075]
- Guangdong-Hong Kong joint innovation project [2016A050503012]
- National Key Research and Development Project from the Ministry of Science and Technology [2016YFA0202400, 2016YFA0202404]
- Peacock Team Project from Shenzhen Science and Technology Innovation Committee [KQTD2015033110182370]
- Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province [YQ2015151]
- Southern University of Science and Technology
In this study, ZnO/ZnS hierarchical nanobranch like composite with Cu(OH)(2) clusters were designed via a simple facile hydrothermal process followed by precipitation reaction. Anchoring Cu(OH)(2) clusters on the ZnO/ZnS composite surface can shorten the charge migration distance, providing abundant active sites and extend the visible-light absorption. The effects of Cu(OH)(2) clusters loading on the photocatalytic application were investigated. The photocatalytic activities for hydrogen production were evaluated under visible-light (lambda > 400 nm) irradiation. It was found that coupling suitable weight ratio of Cu(OH)(2) cluster over the ZnO/ZnS nanobranches will enhance the photocatalytic hydrogen evolution by 46.5 and 13.7 times higher than pure Zn-5(CO3)(2)(OH)(6) and ZnO/ZnS, nanobranches respectively and an apparent quantum efficiency of 11.5% at lambda = 420 nm, and 14.7% under monochromatic LED light irradiation of 520 nm wavelength was achieved. This results show that construction of ZnO/ZnS nanobranches decorated with Cu(OH)(2) clusters can effectively improve the charge transfer and enhance the photocatalytic hydrogen production. The as-prepared ZnO/ZnS nanobranches decorated with Cu(OH)(2) clusters exhibits outstanding stability and recyclability. The mechanism for the enhanced hydrogen evolution is also discussed.
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