CuS doped CdS materials(CuS/CdS) were prepared by a simple coprecipitation approach,and their physical and chemical properties were characterized by XRD,SEM,UV-Vis and DTG. Their photocatalytic activity was evaluated by degradation of methyl orange dye under visible light irradiation. The results show that the antioxidant capacity of CdS can be enhanced and its absorption in the visible region was strengthened after the doping of CuS. As a result,its photocatalytic activity was significantly improved for th...