Ag3PO4 was synthesized by silver ammonia auxiliary method, and Ag3PO4/ZnO was mixed by ultrasonic dispersion, Ag3PO4 and Ag3PO4/ZnO were characterized by XRD and SEM. The influence of preparation conditions, such as irradiation time, heat-treated temperature, heat-treated time and the concentration of methyl orange on the degradation efficiency were investigated under ultrasound irradiation. The results revealed that the degradation ratio of methyl orange dye in the presence of Ag3PO4/ZnO reached 85.36 % at the 450 °C, 60 min and 180 min, which was obviously higher than the corresponding degradation ratio in the presence of un-doped nanometer ZnO.
