Recent Progress in Tungsten Disulphide Based Photocatalyst for Hydrogen Production and Environmental Remediation

Abstract Semiconductor-based photocatalysis has dramatically increased interest in the field of photocatalysis, because of its ability to directly utilize solar energy into fuels and for the degradation of various pollutants. However, the photocatalytic performance of semiconductor-based photocatalys still lower due to the quick recombination photogenerated electron–hole pairs and low visible light utilization. Therefore, numerous efforts have been made to solve these complications. Particularly, cocatalysts supported semiconductor have been extensively applied in designing and developing highly effective composite photocatalysts for hydrogen photocatalytic application.WS2 has attracted enormous attention in photocatalysis due to its unusual properties like enhancing visible light-harvesting, charge transfer dynamics and surface reactions of a photocatalytic system. In this review, we begin by describing synthesis route, different morphologies and brief sketch properties of WS2. A brief discussion of the WS2 supported metal oxide, metal sulphide, carbon based materials, silver based materials and bismuth based materials photocatalysts is then provided. While various plausible photocatalytic mechanisms of photogenerated-electrons and holes in WS2 composite should be proposed. The applications of WS2 as cocatalyst in the Photocatalytic hydrogen production, organic contaminant degradation and Cr(VI) removal. This review may offer motivation for designing and fabricating novel and efficient WS2 based composite photocatalysts for highly efficient photocatalytic applications.