期刊
NANO LETTERS
卷 11, 期 11, 页码 4774-4779出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl202587b
关键词
Photocatalytic hydrogen production; CuS; ZnS; porous nanosheet; interfacial charge transfer; visible light
类别
资金
- National Natural Science Foundation of China [20877061, 51072154, 91123003, 21005023]
- Natural Science Foundation of Hubei Province [2010CDA078]
- National Basic Research Program of China [2011CB933401, 2009CB939704, 2007CB613302]
- SKLWUT
Visible light photocatalytic H-2 production through water splitting is of great importance for its potential application in converting solar energy into chemical energy. In this study, a novel visible-light-driven photocatalyst was designed based on photoinduced interfacial charge transfer (IFCT) through surface modification of ZnS porous nanosheets by CuS. CuS/ZnS porous nanosheet photocatalysts were prepared by a simple hydrothermal and cation exchange reaction between preformed ZnS(en)(0.5) nanosheets and Cu(NO3)(2). Even without a Pt cocatalyst, the as-prepared CuS/ZnS porous nanosheets reach a high H-2-production rate of 4147 mu mol h(-1) g(-1) at CuS loading content of 2 mol % and an apparent quantum efficiency of 20% at 420 nm. This high visible light photocatalytic H-2-production activity is due to the IFCT from the valence band of ZnS to CuS, which causes the reduction of partial CuS to Cu2S and thus enhances H-2-production activity. This work not only shows a possibility for substituting low-cost CuS for noble metals in the photocatalytic H-2 production but also for the first time exhibits a facile method for enhancing H-2-production activity by photoinduced IFCT.
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