Enhanced photocatalytic hydrogen evolution from in situ formation of few-layered MoS 2 /CdS nanosheet-based van der Waals heterostructures
2017; Royal Society of Chemistry; Volume: 9; Issue: 20 Linguagem: Inglês
10.1039/c7nr01705g
ISSN2040-3372
AutoresShahid Iqbal, Ziwei Pan, Kebin Zhou,
Tópico(s)MXene and MAX Phase Materials
ResumoHere we report for the first time that the H2 bubbles generated by photocatalytic water splitting are effective in the layer-by-layer exfoliation of MoS2 nanocrystals (NCs) into few layers. The as-obtained few layers can be in situ assembled with CdS nanosheets (NSs) into van der Waals heterostructures (vdWHs) of few-layered MoS2/CdS NSs which, in turn, are effective in charge separation and transfer, leading to enhanced photocatalytic H2 production activity. The few-layered MoS2/CdS vdWHs exhibited a H2 evolution rate of 140 mmol g(CdS)−1 h−1 and achieved an apparent quantum yield of 66% at 420 nm.
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