▎ 摘　　要

NOVELTY - Iron oxide nanoparticles and organic solvent are mixed, and aqueous solution containing surfactant-containing phase is dripped and stirred to form oil/water-type emulsion. The oil/water-type emulsion is heated, centrifuged and washed, to obtain iron oxide nanoparticles microspheres. Iron oxide nanoparticles microspheres are calcined and carbonated, to obtain highly-ordered stacked iron oxide nanoparticles microspheres. Highly-ordered stacked iron oxide nanoparticles microspheres are acid etched and graphitized, to obtain three-dimensional interconnected mesoporous graphene balls. USE - Preparation of three-dimensional interconnected mesoporous graphene balls (claimed). ADVANTAGE - The method enables preparation of three-dimensional interconnected mesoporous graphene balls having stable structure, high specific surface area and pore size and controlled morphology by simple method. DETAILED DESCRIPTION - Oleic acid-iron nanoparticle precursor and solvent are mixed at high temperature and pyrolyzed under nitrogen atmosphere at 280-320 degrees C for 1 hour, to obtain iron oxide nanoparticles with different particle size and morphology. Iron oxide nanoparticles and organic solvent are mixed, and aqueous solution containing surfactant-containing phase is dripped and stirred to form oil/water-type emulsion. The oil/water-type emulsion is heated, blown, and organic solvent is evaporated. The product is magnetically adsorbed or centrifuged, and supernatant is discarded. The precipitate is washed with ethanol, to obtain iron oxide nanoparticles microspheres having highly-ordered secondary structure. Iron oxide nanoparticles microspheres are calcined under nitrogen or argon atmosphere at 300 degrees C or more, and surface is coated with oleic acid molecules and carbonated, to obtain highly-ordered stacked iron oxide nanoparticles microspheres. Highly-ordered stacked iron oxide nanoparticles microspheres are acid etched, to obtain high-surface-area mesoporous carbon spheres. High-surface-area mesoporous carbon spheres are graphitized under nitrogen or argon atmosphere at 1000 degrees C or more, to obtain three-dimensional interconnected mesoporous graphene balls. The nanoparticle precursor has pyrolysis temperature of 280-330 degrees C. The solvent comprises hexadecene, octyl ether, octadecene and/or eicosene. The pyrolysis is carried out for 30-90 minutes.