▎ 摘　　要

NOVELTY - Preparation of graphene-loaded ferroferric oxide nanoparticle composite material involves dissolving ferric nitrate nonahydrate, anhydrous glucose and sodium chloride in deionized water, spray-drying solution to obtain precursor powder, calcining precursor powder in tube furnace under argon gas at 700 degrees C at 10 degrees C/minute heating rate for 2 hours, cooling to room temperature, re-calcining product in tube furnace under air oxidizing atmosphere at 250 degrees C at 5 degrees C/minute heating rate for 4 hours, cooling to room temperature, washing until sodium chloride template is removed, and drying at 80 degrees C. USE - Method for preparing graphene-loaded ferroferric oxide nanoparticle composite material used for electromagnetic wave absorption (claimed). DETAILED DESCRIPTION - Preparation of graphene-loaded ferroferric oxide nanoparticle composite material comprises dissolving ferric nitrate nonahydrate as iron source, anhydrous glucose as carbon source and sodium chloride as template at iron, carbon and sodium chloride molar ratio of 0.75-2:30:100 in deionized water by magnetic stirring to obtain homogeneous solution, spray-drying to obtain precursor powder, calcining precursor powder in tube furnace under argon gas at 700 degrees C at 10 degrees C/minute heating rate for 2 hours to carbonize glucose and reduce ferric nitrate, cooling to room temperature at 5 degrees C/minute cooling rate, re-calcining product in tube furnace under air oxidizing atmosphere at 250 degrees C at 5 degrees C/minute heating rate for 4 hours to oxidize iron nanoparticles, cooling to room temperature, washing until sodium chloride template is removed, and drying at 80 degrees C.