期刊
NANOMATERIALS
卷 11, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/nano11123380
关键词
photocatalysis; water splitting; hydrogen evolution; composite materials
类别
资金
- Ministry of Science and Technology (MOST), Taiwan
- Ministry of Science and Technology (MOST) in Taiwan [MOST-107-2221-E-035-001-MY3, MOST-108-2221-035-054-MY3]
Hydrogen is a sustainable and clean fuel that has attracted attention as an alternative to fossil fuels for alleviating global warming. The novel Cu/ZnS/COF composite photocatalyst demonstrated efficient hydrogen production due to its unique core-shell structure and abundant active sites.
Hydrogen is considered to be a very efficient and clean fuel since it is a renewable and non-polluting gas with a high energy density; thus, it has drawn much attention as an alternative fuel, in order to alleviate the issue of global warming caused by the excess use of fossil fuels. In this work, a novel Cu/ZnS/COF composite photocatalyst with a core-shell structure was synthesized for photocatalytic hydrogen production via water splitting. The Cu/ZnS/COF microspheres formed by Cu/ZnS crystal aggregation were covered by a microporous thin-film COF with a porous network structure, where COF was also modified by the dual-effective redox sites of C=O and N=N. The photocatalytic hydrogen production results showed that the hydrogen production rate reached 278.4 mu mol g(-1) h(-1), which may be attributed to its special structure, which has a large number of active sites, a more negative conduction band than the reduction of H+ to H-2, and the ability to inhibit the recombination of electron-hole pairs. Finally, a possible mechanism was proposed to effectively explain the improved photocatalytic performance of the photocatalytic system. The present work provides a new concept, in order to construct a highly efficient hydrogen production catalyst and broaden the applications of ZnS-based materials.
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