▎ 摘　　要

A magnetically separable Fe3O4/Graphene (GE) catalyst was prepared by a facile co-precipitation method. The method features the reduction of graphene oxide and formation of Fe3O4 nanoparticles in one step. Fe3O4/Graphene catalyst was characterized in terms of particle size, crystal structure and surface area by TEM, FTIR, XRD and low temperature nitrogen adsorption-desorption. In the presence of H2O2, the catalytic activities were evaluated by degradation of Methylene blue aqueous solution under simulated sunlight irradiation. The results indicate that catalyst with graphene oxide/Fe3O4 mass ratio of 1:10 shows the highest degradation rate of 98.7% at pH value of 6 in 2 h. The catalyst can be easily separated by an external magnetic field. A degradation rate of 95.7% can be maintained after 10 cycles.