▎ 摘　　要

A simple and facial hydrothermal approach has been developed for the preparation of reduced graphene oxide protected Ag3PO4 composite (RGO-Ag3PO4) visible light photocatalyst. The as-prepared RGO-Ag3PO4 composite was characterized using different techniques. Study showed the size of the Ag3PO4 particles could be turned by the ratio of Ag+ and graphene oxide (GO) in the starting material. DRS analysis revealed that the RGO-Ag3PO4 had excellent visible light response. The photocatalytic degradation of Rhodamine B (RhB) over RGO-Ag3PO4 composite was investigated as a model for analysing its photocatalytic activity. The enhanced photocatalytic performance of RGO-Ag3PO4 composite under visible light illumination is due to the high surface area of RGO, which improved absorption of RhB molecules. The RGO also could efficiently separation of photogenerated electron-hole pairs. Moreover, the introduction of RGO into Ag3PO4 improved the stability of the composite photocatalyst by reducing the rate of decomposing Ag+ to metallic Ag.