▎ 摘　　要

NOVELTY - Preparation of magnetic graphene/ferroferric oxide/manganese dioxide nano composite material comprises dispersing graphene oxide and polyethylene glycol in purified water, placing in ultrasound, mixing, deaerating, adding mixed solution of iron (III) chloride (FeCl3) and iron (II) chloride (FeCl2), reacting, adjusting pH, mixing, reacting, mixing, adding manganese(II) sulfate (MnSO4) solution, adding mixed solution of potassium permanganate (KMnO4) and potassium hydroxide (KOH), reacting, filtering, washing and drying. USE - Method of preparing magnetic graphene/ferroferric oxide/manganese dioxide nano composite material. ADVANTAGE - The method is environment-friendly, fast and simple to use. DETAILED DESCRIPTION - Preparation of magnetic graphene/ferroferric oxide/manganese dioxide nano composite material comprises dispersing graphene oxide and polyethylene glycol in purified water at 20-40 degrees C, placing in ultrasound to obtain uniform suspension, mixing suspension at 20-40 degrees C, deaerating, adding mixed solution of iron (III) chloride (FeCl3) and iron (II) chloride (FeCl2), reacting in anaerobic environment for 4-6 hours, adjusting pH with ammonia to 10.5-11.5, mixing, reacting at 70-80 degrees C for 2-3 hours to obtain mixed solution of reduced graphene oxide/iron oxide (rGO/Fe3O4), mixing, adding manganese(II) sulfate (MnSO4) solution, adding mixed solution of potassium permanganate (KMnO4) and potassium hydroxide (KOH), reacting for 2-4 hours to obtain mixture containing reduced graphene oxide/iron oxide/manganese dioxide (rGO/Fe3O4/MnO2), filtering, washing and drying at 140-160 degrees C for 20-25 hours.