▎ 摘　　要

3D graphene supported p-n heterojunction of Ag3PO4/BiPO4 nanorods (3D Ag3PO4/BiPO4 NR/GA) were successfully prepared by two successive hydrothermal process. Both the changes of structure and size of Ag3PO4/BiPO4 NR were observed after anchoring them on the surface of flake-like graphene nanosheets to form 3D aerogel structures. Experimental results showed that the removal of RhB could reach 96.8% under simulated sunlight irradiation using the prepared 3D Ag3PO4/BiPO4 NR/GA composite as the photocatalyst, higher than that of 67.7% under UV irradiation and 91.5% under visible light irradiation, respectively. The prepared photocatalyst also exhibited much higher photocatalytic activity than Ag3PO4/BiPO4 NR. Besides the 3D graphene structure and the existence of p-n heterojunction, the increased number of active oxidizing species resulted by simulated sunlight irradiation, neither UV nor visible light driving, were also responsible for such enhanced simulated sunlight photocatalytic activity. Moreover, the photoactivity of the used 3D Ag3PO4/BiPO4 NR/GA photocatalyst can be fully restored after five successive cycles with an aid of H2O2, exhibiting a good stability and photocatalytic cycling performance.