▎ 摘　　要

NOVELTY - Preparing magnetic graphene with narrow and thin dimensions comprises (i) suspending the carbon-based raw material in an oxidant solution at 20-100 degrees C, soaking for 12-48 hours, washing and drying to obtain a graphene oxide precursor; (ii) dispersing the graphene oxide precursor in deionized water to obtain a graphene oxide precursor solution, and freeze-drying the graphene oxide precursor solution; (iii) placing the dried powder in a reducing agent solution at 20-100 degrees C, soaking for 12-48 hours, washing and drying to obtain a reduced graphene oxide precursor; (iv) adding the reduced graphene oxide precursor into the aqueous solution of metal salt, adjusting the pH to 9-11, stirring and dispersing for 1-12 hours under the conditions of inert gas and temperature of 80-280 degrees C, adjusting the pH to 6-8, cooling and washing to obtain a magnetic graphene powder loaded with magnetic particles; and (v) drying the magnetic graphene powder loaded, and heating. USE - The method is useful for preparing magnetic graphene with narrow and thin dimensions. ADVANTAGE - The method solves the problem that the existing magnetic graphene process is complex, the cost is high, the magnetic particle combination is not good, the size is large, and it is difficult to industrialize. DETAILED DESCRIPTION - Preparing magnetic graphene with narrow and thin dimensions comprises (i) suspending the carbon-based raw material in an oxidant solution at 20-100 degrees C, soaking for 12-48 hours, washing and drying to obtain a graphene oxide precursor; (ii) dispersing the graphene oxide precursor in deionized water to obtain a graphene oxide precursor solution, and freeze-drying the graphene oxide precursor solution for 12-48 hours at a temperature of -50 to -20 degrees C to obtain a dry powder; (iii) placing the dried powder in a reducing agent solution at 20-100 degrees C, soaking for 12-48 hours, washing and drying to obtain a reduced graphene oxide precursor; (iv) adding the reduced graphene oxide precursor into the aqueous solution of metal salt, adjusting the pH to 9-11, stirring and dispersing for 1-12 hours under the conditions of inert gas and temperature of 80-280 degrees C, adjusting the pH to 6-8, cooling and washing to obtain a magnetic graphene powder loaded with magnetic particles, where the aqueous solution of metal salt is an aqueous solution of iron salt, an aqueous solution of cobalt salt or an aqueous solution of nickel salt; and (v) drying the magnetic graphene powder loaded with magnetic particles for 12-48 hours at 60-80 degrees C, heating at 400-800 degrees C for 1-2 hours to obtain magnetic graphene with narrow and thin dimensions.