期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 29, 页码 24577-24583出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06030
关键词
Z-scheme; copper indium sulfide; graphitic carbon nitride; hydrogen generation; photocatalytic water splitting
资金
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201601]
The effective separation of photogenerated electrons and holes in photocatalysts is a prerequisite for efficient photocatalytic water splitting. CuInS2 (CIS) is a widely used light absorber that works properly in photovoltaics but only shows limited performance in solar-driven hydrogen evolution due to its intrinsically severe charge recombination. Here, we prepare hierarchical graphitic C3N4-supported CuInS2 (denoted as GsC) by an in situ growth of CIS directly on exfoliated thin graphitic C3N4 nanosheets (g-C3N4 NS) and demonstrate efficient separation of photoinduced charge carriers in the GsC by forming the Z-scheme system for the first time in CIS-catalyzed water splitting. Under visible light illumination, the GsC features an enhanced hydrogen evolution rate up to 1290 mu mol g(-1) h(-1), which is 3.3 and 6.1 times higher than that of g-C3N4 NS and bare-CIS, respectively, thus setting a new performance benchmark for CIS-based water-splitting photocatalysts.
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