The band gap width of bulk MoS2 material is very narrow about 1.17ev, and it is artificially adjustable. The band gap width of MoS2 material reaching single layer can be increased to 1.91ev, so the band gap width is very efficient for visible light absorption. Because of the complex atom and special electronic structure, it has a very fast carrier transmission speed (more than its own (200cm · V-1 · s-1) [10]. Nanostructured MoS2 materials have the characteristics of large specific surface area, strong adsorption capacity, more catalytic activity points exposed by nanoparticles, and higher reaction activity. Although MoS2 is a very good photocatalyst in theory, its reaction activation sites are mainly concentrated in the unsaturated sulfur at the edge, and the highest proportion of sulfur at the base is generally considered to be inactive. Secondly, MoS2 crystal is easy to agglomerate and its boundary is closed automatically, which will directly lead to the lack of its photocatalyst active sites, and it is easy to produce a large proportion of photocarriers at the interface. Therefore, MoS2 is still in its infancy in most photocatalytic research fields.<br>
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