Preparation of tetrahedral Ag3PO4 and mechanism of photocatalytic degradation of RB-42

Abstract

In this study, silver nitrate and sodium phosphate were used as raw materials to prepare highly active Ag3PO4 photocatalyst with visible light response. The structure, morphology and composition of the samples of the obtained samples were characterized by XRD, SEM and XPS. Moreover, the photocatalytic activity was also investigated by means of degradation of reactive black-42(RB-42) in water. The effect of solution on photocatalytic degradation of RB-42 was investigated through the analysis of photocatalytic degradation kinetics. The results were showed that the nano Ag3PO4 is tetrahedral crystal. exhibit excellent efficient photocatalytic activity for the degradation of RB-42. when the addition of concentration of RB-42 was 10 mg·L, pH was 5.8 and the amount of catalyst was 50mg·L, the obtained sample removal efficiency was 80.7% under visible light irradiation. In addition, free radical capture experiments showed that •OH− was the main active substance in the reaction system.