Citation:
Daochuan Jiang, Liang Zhu, Rana Muhammad Irfan, Lei Zhang, Pingwu Du. Integrating noble-metal-free NiS cocatalyst with a semiconductor heterojunction composite for efficient photocatalytic H2 production in water under visible light[J]. Chinese Journal of Catalysis,
;2017, 38(12): 2102-2109.
doi:
10.1016/S1872-2067(17)62956-5
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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.
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