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首页> 外文期刊>Catalysis science & technology >Metallic 1T-LixMoS2 co-catalyst enhanced photocatalytic hydrogen evolution over ZnIn2S4 floriated microspheres under visible light irradiation
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Metallic 1T-LixMoS2 co-catalyst enhanced photocatalytic hydrogen evolution over ZnIn2S4 floriated microspheres under visible light irradiation

机译：金属1 t-lixmos2 co-catalyst增强光催化氢在ZnIn2S4进化花形的可见光下微球辐照

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摘要

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 (H-2) 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-LixMoS(2). Furthermore, the photocatalytic activity is dependent on the content of 1T-Li(x)MoS(2)in the composites. The 2.0 wt% 1-TLixMoS(2)/ ZnIn2S4 sample shows the highest H-2 production rate of 332.4 mu mol 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.
机译：锂插入1 t钼的同素异形体二硫化/锌硫化铟(1 t-lixmos2 / ZnIn2S4)复合材料合成使用两步水热法。和样本特征x射线衍射、扫描电子显微镜、透射电子显微镜,x射线光电子能谱、紫外-可见漫反射吸收光谱,光致发光光谱和拉曼光谱。将二硫化钼夹层反应从六角晶体结构(2 h阶段)1 t三角的阶段。1 t-lixmos2 co-catalyst,光催化氢气(h2)进化ZnIn2S4的活动微球明显增强可见光照射。光催化活性主要归因于金属1 t-lixmos2促进这一事实光激的有效分离电子和空穴的ZnIn2S4微球因为它的高导电性和密度高的活跃的网站。光激电子ZnIn2S4微球不仅可以传输的边缘网站1 t-lixmos2,而且底面活跃网站1 t-lixmos(2)。光催化活动是依赖内容1 t-li (x)金属氧化物半导体(2)复合材料。2.0 wt % 1-TLixMoS (2) / ZnIn2S4示例显示了2最高产量为332.4μ摩尔h(1)的2.4倍裸ZnIn2S4和1.3倍2.0 wt % 2 h-mos2 / ZnIn2S4,保持稳定即使三个光催化循环测试。

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