Jump to main content
Jump to site search


Metallic 1T-LixMoS2 co-catalyst enhanced photocatalytic hydrogen evolution over ZnIn2S4 floriated microspheres under visible light irradiation

Author affiliations

Abstract

Lithium intercalated 1T allotropes of molybdenum disulfide/zinc indium sulfide (1T-LixMoS2/ZnIn2S4) composites were synthesized using a two-step hydrothermal method. The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance absorption spectra, photoluminescence emission spectra and Raman spectra. The results indicate that the lithium intercalation reaction transforms the MoS2 crystal from the hexagonal structure (2H phase) to the trigonal 1T phase. By introducing metallic 1T-LixMoS2 as a co-catalyst, the photocatalytic hydrogen (H2) evolution activity of the ZnIn2S4 microspheres is significantly enhanced under visible light irradiation. The enhanced photocatalytic activity is mainly attributed to the fact that the metallic 1T-LixMoS2 promotes the efficient separation of the photoexcited electrons and the holes of ZnIn2S4 microspheres because of its high electrical conductivity and high densities of the active sites. The photoexcited electrons of ZnIn2S4 microspheres can not only transfer to the edge sites of 1T-LixMoS2, but also to the basal plane active sites of 1T-LixMoS2. Furthermore, the photocatalytic activity is dependent on the content of 1T-LixMoS2 in the composites. The 2.0 wt% 1T-LixMoS2/ZnIn2S4 sample shows the highest H2 production rate of 332.4 μmol h−1, which is 2.4 times higher than that of bare ZnIn2S4 and 1.3 times higher than that of 2.0 wt% 2H-MoS2/ZnIn2S4, and it remains stable even after three photocatalytic cycling tests.

Graphical abstract: Metallic 1T-LixMoS2 co-catalyst enhanced photocatalytic hydrogen evolution over ZnIn2S4 floriated microspheres under visible light irradiation

Back to tab navigation

Publication details

The article was received on 01 Dec 2017, accepted on 22 Jan 2018 and first published on 29 Jan 2018


Article type: Paper
DOI: 10.1039/C7CY02456H
Citation: Catal. Sci. Technol., 2018, Advance Article
  •   Request permissions

    Metallic 1T-LixMoS2 co-catalyst enhanced photocatalytic hydrogen evolution over ZnIn2S4 floriated microspheres under visible light irradiation

    J. Liu, W. Fang, Z. Wei, Z. Qin, Z. Jiang and W. Shangguan, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C7CY02456H

Search articles by author

Spotlight

Advertisements