▎ 摘　　要

NOVELTY - Preparation of graphene foam composite material loaded with magnetic hollow nanospheres comprises preparing graphene oxide with different oxidation degree by Hummers method, freeze-drying to obtain graphene oxide powder, mixing graphene oxide powder and isopropanol, adding metal salt, cetrimonium bromide (CTAB), glycerin and water, placing in ultrasonic 1-2 hours, mixing to obtain reaction liquid, injecting reaction fluid into the kettle, performing hydrothermal reaction at 160-220 degrees C for 6-24 hours, separating, washing, freeze-drying to obtain precursor of graphene foam with metal salt and calcining at high temperature under the condition of inert gas. The proportion of each substance in the reaction solution is graphene oxide powder, isopropanol, glycerin, water, CTAB and metal salt at 100-400 mg: 50-70 ml: 7-10 ml: 0-2 ml: 0-2000 mg: 500-3000 mg. USE - The method is for preparation of graphene foam composite material loaded with magnetic hollow nanospheres. ADVANTAGE - The composite material has excellent electromagnetic performance.