Abstract:In this study, a TiO2/CuS heterojunction photocatalyst was prepared by a combination of in-situ precipitation and hydrothermal methods. This heterojunction improves the defects of a single TiO2 semiconductor photocatalyst and significantly improves the efficiency of photocatalytic degradation of methyl orange under sunlight. The heterojunction structure and suitable band structure formed between TiO2 and CuS can extend the response range of the material to the solar spectrum and collect and transmit light-induced carriers well, thereby improving the carrier separation efficiency. The photocatalytic activity of the semiconductor is significantly enhanced. After 25 minutes of sunlight exposure, compared with TiO2/MnS, TiO2/CdS and TiO2/ZnS heterojunctions, the TiO2/CuS heterojunction (the molar ratio of TiO2 and CuS is 3:1) has the best degradation effect on methyl orange, and the degradation efficiency can reach 97.3%.
