▎ 摘　　要

NOVELTY - One-step solvothermal preparation of ferroferric oxide/graphene magnetic nanocomposite material involves ultrasonically dispersing graphite oxide, ferric chloride hexahydrate and polyvinylpyrrolidone in mixed solvent of water and ethylene glycol to obtain mixed solution A; ultrasonically dispersing sodium bicarbonate in ethylene glycol to obtain mixed solution B; slowly adding mixed solution A to mixed solution B, uniformly mixing, adding in PTFE-lined kettle, putting in blast-drying oven, reacting and cooling reaction liquid; and separating, washing filter cake and vacuum-drying. USE - Method for one-step solvothermal preparation of ferroferric oxide/graphene magnetic nanocomposite material (claimed). ADVANTAGE - The material has uniform and narrow particle distribution, where particle diameter is 10-30 nm. DETAILED DESCRIPTION - One-step solvothermal preparation of ferroferric oxide/graphene magnetic nanocomposite material comprises: (A) taking ferric chloride hexahydrate and graphite oxide as raw materials, sodium bicarbonate as alkali source, polyvinylpyrrolidone as surfactant, and ethylene glycol and water as solvents; (B) ultrasonically dispersing graphite oxide, ferric chloride hexahydrate and polyvinylpyrrolidone in mixed solvent of water and ethylene glycol for 30-50 minutes to obtain mixed solution A; (C) ultrasonically dispersing sodium bicarbonate in ethylene glycol for 10-20 minutes to obtain mixed solution B; (D) slowly adding mixed solution A to mixed solution B, uniformly mixing, adding into PTFE-lined kettle at filling degree of 70-80%, putting in blast-drying oven, reacting at 150-200 degrees C and less than 2.5 MPa for 4-12 hours and cooling reaction liquid; and (E) separating by magnet or centrifugally separating, washing filter cake with deionized water and anhydrous ethanol for 2-3 times and vacuum-drying at 60 degrees C for 8 hours.