One-pot preparation of graphene/Fe3O4 composites by a solvothermal reaction

Abstract

A one-pot solvothermal reaction was used to prepare graphene/Fe₃O₄ composites using graphite oxide and FeCl₃·6H₂O as starting materials. Graphene oxide was reduced to graphene and the Fe₃O₄ microspheres were simultaneously grown on the carbon basal planes under the conditions generated in the solvothermal system. The product showed a high crystallinity of magnetite and a considerable saturation magnetization. The size and density of the Fe₃O₄ microspheres distributed on the graphene can be easily controlled by altering the starting Fe³⁺ concentration. Doxorubicin hydrochloride was loaded on to the graphene/Fe₃O₄ composites by simple mixing, and a saturation loading capacity as high as 65% could be achieved.