▎ 摘　　要

NOVELTY - The method for preparation of manganese ferrite-graphene composite material, involves adding graphite oxide 2-pyrrolidone, dispersing, adding ferric acetylacetonate, manganese acetylacetonate and octadecylamine, heating, refluxing, adding organic solvent, stopping the reaction, separating the reaction products and washing and drying the reaction product. The mass ratio of graphite oxide and ferric acetylacetonate is 0.1-0.2. The mass ratio of graphite oxide and manganese acetylacetonate is 0.3-0.45. The mass ratio of graphite oxide and octadecyl amine is 1:80-1:40. USE - Method for preparation of manganese ferrite-graphene composite material (claimed). ADVANTAGE - The method enables preparation of manganese ferrite-graphene composite material with average diameter of 10 nm and excellent absorbing performance. DETAILED DESCRIPTION - Method for preparation of manganese ferrite-graphene composite material, involves adding graphite oxide 2-pyrrolidone, dispersing, adding ferric acetylacetonate, manganese acetylacetonate and octadecylamine, heating at 100-150 degrees C for 20-50 minutes, refluxing for 1-5 hours, adding an organic solvent, stopping the reaction, separating the reaction products and washing and drying the reaction product. The mass ratio of graphite oxide and ferric acetylacetonate is 0.1-0.2. The mass ratio of graphite oxide and manganese acetylacetonate is 0.3-0.45. The mass ratio of graphite oxide and octadecyl amine is 1:80-1:40.