▎ 摘　　要

NOVELTY - Preparing graphene/iron oxide composite material comprises (i) reacting graphene dispersion liquid and ferric chloride hexahydrate (or ferric nitrate) in an alkaline environment, and (ii) filtering the resulting solution, washing, and drying to obtain graphene/iron oxide nanoparticle composite material. USE - The method is useful for preparing graphene/iron oxide composite material (claimed). ADVANTAGE - The method: is easy; and ensures obtaining composite material with high quality graphene sheets and uniform particle sizes; and solves the problem that the graphene with poor water-soluble performance cannot be directly composited.