▎ 摘　　要

NOVELTY - Preparing magnetic graphene involves adding the graphene oxide into the mixture of oil amine and dibenzyl ether, uniformly mixing to obtain the dispersion A, dissolving the iron tri acetate into the dispersion A, pre-processing and dispersing uniformly to obtain the dispersion B, transferring the dispersion B into a sealed high pressure container, and then washing with inert gas to obtain the dispersion C, thermally reducing the dispersion C and aging to obtain the dispersion D, cooling the dispersion D to room temperature and adding volatile polar solvent to obtain product. USE - Method for preparing magnetic graphene used in a field of composite graphene material and used in magnetic resonance imaging (MRI). ADVANTAGE - The method is simple and efficient, and provides magnetic graphene with good ferromagnetic performance. The process occurs in the sealed high pressure container, which can inhibit component volatilization and high temperature condition is good for improving magnetism.