ZnS photocatalyst


ZnS is a group of IIVI comprehensive band gap semiconductor materials with a band gap between 3.6-3.8 eV. The ZnS has two crystal structures: zinc blende and Wurtzite. Zinc blende, also called β‐ZnS, is stable at low temperatures, whereas Wurtzite, also called α-ZnS, is stable at temperatures>1024°C. The ZnS is difficult to oxidize and hydrolyze. Of note, these properties are unaltered even when the size of ZnS is reduced to a nanometer scale. Therefore, ZnS nanomaterials exhibit excellent photocatalytic activity. Moreover, ZnS is nontoxic, easily fabricated, and widely used. Many studies have successfully synthesized lowdimensional nanomaterials such as ZnS nanoparticles, nanowires, nanotubes, and nanosheets. The following properties are the three most common approaches for enhancing the ZnS photocatalytic activity. (i) Surface area is increased by changing the ZnS morphology. A high specific surface area can increase the active site on the ZnS surface. It can increase the contact area between ZnS and the reactant, increasing its photocatalytic activity. (ii) Altering the electronic properties and band structure of ZnS through doping with other metals and nonmetallic elements, the absorption rate of ZnS to visible light is improved, thereby improving the photocatalytic efficiency of ZnS. (iii) ZnS forms a heterojunction with other semiconductors or a composite structure with noble metals to reduce the electronhole recombination rate, thereby improving the photocatalytic performance of ZnS (Zhang et al., 2007). If you are looking for high quality, high purity, and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.

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