▎ 摘　　要

NOVELTY - Black thin paper-like graphene oxide, ethylene glycol and polyethylene glycol 20000 are mixed in 25-80 degrees C water bath and ultrasonic dispersed. Iron(III) chloride hexahydrate is added and dissolved, after adding sodium acetate or potassium acetate and acetic acid. The mixture is ultrasonically-stirred, provided to autoclave, crystallized, magnetically-separated, washed with deionized water and ethanol, and dried, to obtain graphene and ferriferrous oxide composite nanomaterial. USE - Preparation of graphene and ferriferrous oxide composite nanomaterial used for biological medicine, energy and electronic materials. ADVANTAGE - The method enables preparation of graphene and ferriferrous oxide composite nanomaterial having microspheric appearance, high specific surface area, and excellent magnetic property and electrical property. The growth of graphene and ferriferrous oxide composite material is controlled. DETAILED DESCRIPTION - Sulfuric acid and phosphoric acid are added to three-necked flask equipped with a condenser, mixed and processed to room temperature. Flake graphite is slowly added and stirred at room temperature for 1-3 hours. Potassium permanganate is slowly added and reacted at more than 40 degrees C to form dark green material. The reaction material is slowly heated at 40-60 degrees C and stirred for 8-24 hours, to form flake graphite oxide stripping solution. The flake graphite oxide stripping solution is slowly poured with stirring to deionized water with ice, to obtain liquid mixture. The liquid mixture is stirred and processed at room temperature. Liquid hydrogen peroxide is dripped and mixed to form bright yellow mixture liquid. The bright yellow mixture liquid is centrifuged and washed with dilute hydrochloric acid and deionized water until neutral, to obtain graphene oxide yellow. The graphene oxide yellow is dried under vacuum at 40-60 degrees C, to obtain black thin paper-like graphene oxide. The ratio of graphite, sulfuric acid, phosphoric acid and potassium permanganate is 1 g:90-150 mL:10-18 mL:3-10 g. Black thin paper-like graphene oxide, ethylene glycol and polyethylene glycol 20000 are mixed in 25-80 degrees C water bath and ultrasonic dispersed. Iron(III) chloride hexahydrate is added and dissolved, after adding sodium acetate or potassium acetate and acetic acid. The mixture is ultrasonically-stirred for 1-3 hours, to obtain graphene composite iron oxyhydroxide slurry. The graphene composite iron oxyhydroxide slurry is provided to autoclave and crystallized at 200 degrees C for 15-24 hours in oven. The mixture is magnetically-separated, washed with deionized water and ethanol, and dried in oven under vacuum at 80 degrees C, to obtain graphene and ferriferrous oxide composite nanomaterial. The ratio of iron(III) chloride hexahydrate and ethylene glycol is 1 g:10-40 mL. The ratio of iron(III) chloride hexahydrate and polyethylene glycol 20000 is 1 g:1-10 g. The ratio of iron(III) chloride hexahydrate and sodium acetate or potassium acetate is 1 g:1-10 g. The ratio of iron(III) chloride hexahydrate and black thin paper-like graphene oxide is 1 g:10-100 mg.