▎ 摘　　要

NOVELTY - A functionalized graphene-based magnetic nanomaterial comprises magnetic graphene nanomaterial and modified magnetic graphene nanomaterial of cationic polymer polydimethyldiallylammonium chloride. The functionalized graphene magnetic nanomaterial have spongy structure. USE - Functionalized graphene-based magnetic nanomaterial (claimed). ADVANTAGE - The functionalized graphene-based magnetic nanomaterial with high efficiency is manufactured by simple, economical and environmentally-friendly process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for production method of functionalized graphene-based magnetic nanomaterial, which involves (1) using modified humus to prepare graphite oxide, carrying out liquid phase ultrasonic dispersion to obtain oxidized graphene nanomaterial, (2) preparing magnetite nanoparticles by chemical coprecipitation method, (3) pre-treating the ferroferric oxide nanoparticles by acidification and compounding graphene oxide to obtain magnetic graphene nanomaterial and (4) modifying the magnetic graphene nanomaterial.