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Fe3O4/SiO2 porous nanorods with core/shell structure and high aspect ratio were synthesized by a facile wet chemical method.Subsequently, Fe3O4/SiO2/graphene nanocomposites were prepared under ultrasonic treatment based on the synthesized nanorods.Structure and morphology studies revealed that the Fe3O4/SiO2 core-shell nanorods with an average diameter of 140nm and length of 1.5μ m decorating on both sides of the graphene.