▎ 摘　　要

NOVELTY - The preparation method of graphene/ferrite octahedral composite nano-magnetic material involves adding graphene oxide to ethylene glycol, and ultrasonically processing to obtain uniform black liquid, adding metal nitrate hexahydrate and iron(III) nitrate nonahydrate to ethylene glycol, magnetically stirring to form dark red brown solution, adding obtained black liquid, continuously stirring, heating obtained mixed solution, reacting to obtain black liquor, cooling obtained black liquor, collecting black precipitate, repeatedly washing, drying, and calcining. USE - Preparation method of graphene/ferrite octahedral composite nano-magnetic material for photocatalytic degradation of pollutants. ADVANTAGE - The method enables preparation of graphene/ferrite octahedral composite nano-magnetic material with large surface area, strong magnetic properties, and photocatalytic effect, by simple process. DETAILED DESCRIPTION - The preparation method of graphene/ferrite octahedral composite nano-magnetic material involves taking graphene oxide, ethylene glycol, metal nitrate hexahydrate and iron(III) nitrate nonahydrate as raw material, where the molar ratio of iron(III) nitrate nonahydrate and metal nitrate hexahydrate is 2:1, 1 g iron(III) nitrate nonahydrate is added per 10-40 ml of ethylene glycol, and the mass ratio of iron(III) nitrate nonahydrate and oxidized graphene is 100:(1-10), adding graphene oxide to ethylene glycol, and ultrasonically processing to obtain uniform black liquid, adding metal nitrate hexahydrate and iron(III) nitrate nonahydrate to ethylene glycol, magnetically stirring at room temperature to form dark red brown solution, adjusting the pH value of dark red brown solution to 8-10 under stirring condition, adding obtained black liquid, continuously stirring for 60 minutes, and uniformly mixing, (4) heating the obtained mixed solution at 200 degrees C, reacting for 12 hours to obtain black liquor, which is iron-magnesium-graphene oxide octahedral front, and (5) cooling the obtained black liquor to room temperature, collecting black precipitate, repeatedly washing with anhydrous ethanol, drying at 60 degrees C for 6 hours, and calcining at 650 degrees C at rate of 2 degrees C/minute for 2 hours to obtain black powder.