Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (12): 2102-2109.DOI: 10.1016/S1872-2067(17)62956-5

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Integrating noble-metal-free NiS cocatalyst with a semiconductor heterojunction composite for efficient photocatalytic H2 production in water under visible light

Daochuan Jiang, Liang Zhu, Rana Muhammad Irfan, Lei Zhang, Pingwu Du   

  1. CAS Key Laboratory of Materials for Energy Conversion, Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, iChEM(Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei 230026, Anhui, China
  • Received:2017-10-09 Revised:2017-10-31 Online:2017-12-18 Published:2017-12-29
  • Supported by:

    This work was supported by the National Key Research and Development Program of China (2017YFA0402800), the National Natural Science Foundation of China (51772285, 21473170).

Abstract:

Photocatalytic water splitting is an economical and sustainable pathway to use solar energy for large-scale H2 production. We report a highly efficient noble-metal-free photocatalyst formed by integrating amorphous NiS with a CdS nanorods (NRs)/ZnS heterojunction material for photocatalytic H2 production in water under visible light irradiation (λ > 420 nm). The results show that the photocatalytic H2 production rate reaches an optimal value of up to 574 μmol·h-1 after the loading of NiS, which is more than 38 times higher than the catalytic activity of pure CdS NRs. The average apparent quantum yield is~43.2% during 5 h of irradiation by monochromatic 420 nm light. The present study demonstrates the advantage of integration strategies to form not only semiconductor heterojunctions but also photocatalyst-cocatalyst interfaces to enhance the catalytic activity for photocatalytic H2 production.

Key words: Photocatalytic hydrogen evolution, CdS/ZnS, Heterojunction, Nickel sulfide