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

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• 作者：Jie He ; Lang Chen ; Zi-Qi Yi ; Chak-Tong Au ; Shuang-Feng Yin
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：August 3, 2016
• 年：2016
• 卷：55
• 期：30
• 页码：8327-8333
• 全文大小：504K
• 年卷期：0
• ISSN：1520-5045

文摘

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.