CdS Nanorods Coupled with WS2 Nanosheets for Enhanced Photocatalytic Hydrogen Evolution Activity

WS2 nanosheets–CdS nanorods with heterojunctions were prepared by an ultrasonic/exfoliation method using dimethylformamide as the dispersing agent. CdS nanorods were coupled with small WS2 nanosheets as a result of exfoliation. An excellent hydrogen production rate of 1222 μmol h–1 (20 mg of catalys...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2016-08, Vol.55 (30), p.8327-8333
Main Authors: He, Jie, Chen, Lang, Yi, Zi-Qi, Au, Chak-Tong, Yin, Shuang-Feng
Format: Article
Language:English
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Summary:WS2 nanosheets–CdS nanorods with heterojunctions were prepared by an ultrasonic/exfoliation method using dimethylformamide as the dispersing agent. CdS nanorods were coupled with small WS2 nanosheets as a result of exfoliation. An excellent hydrogen production rate of 1222 μmol h–1 (20 mg of catalyst) was achieved over the WS2–CdS composite with a WS2-to-CdS mass ratio of 1.6:1 under visible-light irradiation (λ ≥ 400 nm). The efficient evolution of hydrogen is attributed to promotion of the separation of photogenerated charge carriers due to the presence of heterojunctions created on the surface.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.6b01511