▎ 摘　　要

NOVELTY - The preparation method of zero valent iron/graphene/three-dimensional nano micro-capsule involves adding graphite powder and sodium nitrate to sulfuric acid, stirring and dispersing to obtain mixed liquid (A), adding potassium permanganate to mixed liquid (A), stirring, releasing heat, heating, and stirring to obtain mixed liquid (B), adding deionized water to mixed liquid (B), reacting, stirring, and reacting to obtain mixed liquid (C), stopping heating, adding hydrogen peroxide to mixed liquid (C), stirring, and reacting, washing, and vacuum drying to obtain oxidized graphene. USE - Preparation method of zero valent iron/graphene/three-dimensional nano micro-capsule used in polluted environment remediation and magnetic material applications (claimed), dye decolorization, heavy metal adsorption and magnetic resonance imaging. ADVANTAGE - The method enables preparation of zero valent iron/graphene/three-dimensional nano micro-capsule with excellent dispersibility, long-term storage, and stability, which effectively avoids the iron nano material. DETAILED DESCRIPTION - The preparation method of zero valent iron/graphene/three-dimensional nano micro-capsule involves (S01) adding graphite powder and sodium nitrate to 95% sulfuric acid, placing in ice bath, stirring and dispersing to obtain mixed liquid (A), (S02) adding potassium permanganate to the mixed liquid (A), stirring at 0 degrees C, releasing heat, heating at 30-40 degrees C, and continuously stirring to obtain mixed liquid (B), (S03) adding deionized water to the mixed liquid (B), reacting at 95-100 degrees C, uniformly stirring, and reacting to obtain mixed liquid (C), (S04) stopping heating, adding hydrogen peroxide to mixed liquid (C), stirring, and reacting, (S05) washing, and vacuum drying to obtain oxidized graphene, (S06) adding trivalent iron salt and deionized water to water bath, stirring at 70-90 degrees C, reacting, washing, and vacuum drying to obtain hydroxyl iron oxide, (S07) adding oxidized graphene and hydroxyl iron oxide to deionized water to prepare 0.1-1 mg/ml oxidized graphene solution and 0.25-2.5 mg/ml hydroxyl iron oxide solution, (S08) ultrasonically mixing the oxidized graphene solution and hydroxyl iron oxide solution to obtain precursor solution, (S09) ultrasonically fogging the precursor solution to obtain aerosol particles, (S10) placing the aerosol particles under inert gas atmosphere, and reacting at 200-700 degrees C to obtain iron/graphene/three-dimensional nano-microcapsules, and (S11) placing iron/graphene/three-dimensional nano-microcapsules in hydrogen/argon gas atmosphere, and sintering at 400-700 degrees C for 2-4 hours. An INDEPENDENT CLAIM is included for application of zero valent iron/graphene/three-dimensional nano micro-capsule in polluted environment remediation and magnetic material applications.