▎ 摘　　要

NOVELTY - Water soluble graphene oxide derivative (I) is new, where (I) is obtained by performing chemical deposition on the graphene oxide with ferric oxide to obtain water soluble graphene oxide with a hydrophilic group, the mass ratio of the ferric oxide and graphite oxide is 1-11:1, and the graphene oxide is nanoscale graphene oxide. USE - (I) is useful: as anti-tumor medicine carrier in thermal therapy; and in a magnetic resonance imaging contrast agent (all claimed). ADVANTAGE - (I) can be economically prepared with good physical and chemical stability and biocompatibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing (I).