▎ 摘　　要

NOVELTY - The preparation method of magnetic graphene composite material involves uniformly distributing superparamagnetic iron oxide nanoparticles with a particle size of 10-100 nm in surface of graphene material. The composite material is made of graphene and superparamagnetic iron oxide nanoparticles. USE - The method is useful for preparation of magnetic graphene composite material, which is useful for high-efficiency organic dye adsorbent (claimed), for treating environmental sewage and for recycling waste. ADVANTAGE - The method enables simple, easy and economical preparation of magnetic graphene composite material with excellent adsorption properties, surface area, binding site, stability and physical and chemical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for high-efficiency organic dye adsorbent, which is prepared by adding 0.5-2.5 g/l magnetic graphene composite material to 1x 106-1x 104 mol/l organic dye solution, uniformly mixing, stirring the mixture for 10-120 minutes and then reacting, and separating magnetic graphene composite material from solution using magnet.