The reduced graphene oxide@Ag
2O co-modified TiO
2-based composites (rGO@Ag
2O/TiO
2) were successfully synthesized, whose photocatalytic performance under visible light irradiation were also tested. The ternary rGO@Ag
2O/TiO
2 composites show much higher visible light photocatalytic activity than the pure TiO
2 and rGO/TiO
2、Ag
2O/TiO
2 binary composites, of which almost 100% Rhodamine B (RhB) molecules were decomposed by the rGO@Ag
2O/TiO
2 composites after 120 min visible light irradiation. Due to the introduction of the narrow gap semiconductor Ag
2O and the admirable electron conductivity rGO, so the rGO@Ag
2O/TiO
2 ternary composites have strong visible light absorption ability and potent separation of electron-holes pairs, the ternary rGO@Ag
2O/TiO
2 composites show much higher visible light photocatalytic activity.