▎ 摘　　要

A magnetic Fe-0/Fe3O4/graphene was prepared and used to remove methylene blue, a typical dye, from water. The feasibility study on removal efficiency of methylene blue was carried by graphene, Fe-0, Fe3O4 and Fe-0/Fe3O4/graphene separately. Results showed that excellent synergetic effect among Fe-0,Fe3O4 and graphene existed in the composite. The composite could remove methylene blue in neutral pH conditions and 91.6% methylene blue was removed within 20 min at Fe-0/Fe3O4/graphene dosage of 1.0 g/L and initial concentration of 50 mg/L. 50% TOC removal efficiency of methylene blue after reaction was achieved, showing that chemical degradation occurred. The concentration of dissolved Fe was less than 2 mg/L, which was much less than the amount of Fe in Fe-0/Fe3O/graphene, showing an excellent chemical stability. In order to study the surface morphology and phase composition of the composite, BET, XRD and SEM analyses were performed. The results showed that the composite was not simply a mixture of Fe, Fe3O4 and graphene, but was a composite with stable structure and large specific surface area (45 m(2)/g). A potential mechanism involving microstructure of the composite and reaction behavior was proposed based on the experimental results.