▎ 摘　　要

NOVELTY - The preparation of functionalized graphene, involves preparing graphene oxide and magnetic chitosan microspheres, dispersing graphene oxide in deionized water, obtaining graphene oxide dispersion, immersing magnetic chitosan microspheres in graphene oxide dispersion, and allowing to stand. USE - Preparation of functionalized graphene (claimed). ADVANTAGE - The method enables preparation of functionalized graphene in non-toxic and economical manner, using wide source of chitosan and graphite powder as raw material, and the graphene oxide has excellent performance in repairing the polluted water body.