Citation: Bo Chai, Chun Liu, Chunlei Wang, Juntao Yan, Zhandong Ren. Photocatalytic hydrogen evolution activity over MoS₂/ZnIn₂S₄ microspheres[J]. Chinese Journal of Catalysis, ;2017, 38(12): 2067-2075. doi: 10.1016/S1872-2067(17)62981-4 shu

Photocatalytic hydrogen evolution activity over MoS₂/ZnIn₂S₄ microspheres

School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, China

Received Date: 9 October 2017
Revised Date: 31 October 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (51302200).

MoS₂/ZnIn₂S₄ composites with MoS₂ anchored on the surface of ZnIn₂S₄ microspheres were synthesized by a two-step hydrothermal process. The obtained samples were characterized by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, ultraviolet-visible diffuse reflectance absorption spectroscopy, nitrogen adsorption-desorption measurements, photoluminescence spectroscopy, and photoelectrochemical tests. The influence of the loading of MoS₂ on the photocatalytic H₂ evolution activity was investigated using lactic acid as a sacrificial reagent. A H₂ evolution rate of 343 μmol/h was achieved under visible light irradiation over the 1 wt% MoS₂/ZnIn₂S₄ composite, corresponding to an apparent quantum efficiency of about 3.85% at 420 nm monochromatic light. The marked improvement of the photocatalytic H₂ evolution activity compared with ZnIn₂S₄ can be ascribed to efficient transfer and separation of photogenerated charge carriers and facilitation of the photocatalytic H₂ evolution reaction at the MoS₂ active sites.
- Composite,
- Cocatalyst,
- Photocatalytic hydrogen evolution,
- Charge carrier,
- Separation
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Photocatalytic hydrogen evolution activity over MoS₂/ZnIn₂S₄ microspheres