N-doped graphene-based CuO/WO3/Cu composite material with performances of catalytic decomposition 4-nitrophenol and photocatalytic degradation of organic dyes

Due to environmental pollution caused by organic pollutants, there is an urgent need to develop renewable and environmentally friendly energy sources. In this study, N-doped graphene-based CuO/WO 3 /Cu photocatalyst (CuO/WO 3 /Cu@CN) was prepared for degrading organic pollutants by using Cu(salen)PW 12 complex as the precursor and GO as the substrate. The CuO/WO 3 /Cu@CN photocatalyst not only solved the problem that CuO/WO 3 heterojunction easily expands into powder and causes poor recyclability, but also effectively promoted the separation of photoinduced e - and h + and inhibited their recombination. The catalyst can effectively catalyze the decomposition of 4-nitrophenol, and the cycle test confirmed that it has good cycle stability. Under UV–Vis light irradiation, CuO/WO 3 /Cu@CN can effectively degrade four kinds of organic dyes and the mechanism of photocatalytic degradation of organic dyes was deduced. It is worth noting that N-doped graphene regulates the band-gap of the material, leading CuO/WO 3 /Cu@CN to generate hydrogen in the photocatalytic process. This study is expected to provide a promising way for effective degradation of organic pollutants.