▎ 摘　　要

NOVELTY - Preparing graphene aerogel composite magnetic nanoparticles material involves preparing graphene oxide according to the Hummers method, and arranging 2-5 mg/mL graphite oxide. The graphene oxide glue solution, deionized water, reducing agent, polyvinyl alcohol and metal salt are arranged into reaction liquid in a ratio of 40-100 mg:50 mL: 200-600 mg:300-500 mg:500-800 mg. The prepared reaction solution is poured into a hydrothermal synthesis kettle, and hydrothermally reacted at 140-200 degrees C for 6-12 hours, separated, washed with water, and lyophilized to obtain graphene aerogel loaded with a metal salt. The graphene-loaded graphene aerogel precursor loaded with a metal salt is subjected to inert gas protection at 400 to 800 degrees C for high-temperature sintering to obtain graphene aerogel loaded with magnetic nanoparticles. USE - Method for preparing graphene aerogel composite magnetic nanoparticles material for electromagnetic wave absorbing material. ADVANTAGE - The method enables to prepare graphene aerogel composite magnetic nanoparticles material which has high electromagnetic performance, high specific surface area and low density.