▎ 摘　　要

NOVELTY - A graphene ionic liquid is prepared by adding graphite powder in ionic liquid, mixing by ultrasonic vibration pretreatment to obtain acidic ionic liquid, adding acid and potassium permanganate, performing ultrasonic vibration, absorbing oxygen from ionic liquid, heating and stirring, centrifuging, washing, vacuum-freezing, drying, adding obtained graphene oxide in water, performing ultrasonic vibration, adding alkaline ionic liquid and hydrazine hydrate, performing ultrasonic vibration, cooling reaction liquid, centrifuging, separating precipitate, washing, vacuum-freezing, and drying. USE - Preparation of graphene ionic liquid (claimed). ADVANTAGE - The preparation needs less sulfuric acid and potassium permanganate, is environment-friendly and repeatable, has good mass transfer effect, does not need device, can be continuous operation, and reduces production cost, product has good graphene dispersing effect and high dispersibility in water and solvent. DETAILED DESCRIPTION - A graphene ionic liquid is prepared by adding graphite powder in ionic liquid, uniformly mixing by ultrasonic vibration pretreatment to obtain acidic ionic liquid, adding acid and potassium permanganate, performing ultrasonic vibration under low heat preservation condition, absorbing oxygen from ionic liquid, heating and stirring to obtain precipitate, centrifuging to collect sediments, washing, vacuum-freezing, drying to obtain graphene oxide, adding obtained graphene oxide in water, performing ultrasonic vibration, adding alkaline ionic liquid and hydrazine hydrate, performing ultrasonic vibration under insulated low reaction condition, cooling reaction liquid, centrifuging, separating precipitate, washing, vacuum-freezing, and drying to obtain reduced graphene oxide. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of graphene oxide powder.