▎ 摘　　要

NOVELTY - Preparation of graphene solution involves introducing chlorosulfonic acid solution into container, adding appropriate amount of graphite, stirring until graphite is dissolved in the chlorosulfonic acid solution, concentrating solution, pouring into reaction vessel, placing appropriate amount of metal foil in reaction vessel, introducing protective gas into reaction vessel, reacting at 900-1200 degrees C, soaking metal foil in solution until carbon inside the solution enters the metal foil, taking out metal foil, freezing in freezer compartment to form a layer of graphene on the surface, scraping graphene, pouring in container, taking upper layer of graphene suspension, introducing purified water into container to form a graphene suspension, stirring, washing liquid in the container with deionized water, ultrasonically processing to obtain homogeneous solution, centrifuging, washing, spray-drying to obtain graphene particles, dissolving graphene particles in purified water and stirring. USE - Preparation of graphene solution. ADVANTAGE - The method enables simple preparation of graphene solution with improved purity.