▎ 摘　　要

NOVELTY - Method for preparing graphite alkene, involves (a) taking graphite powder, concentrated sulfuric acid, potassium permanganate powder, hydrogen peroxide, concentrated hydrochloric acid and deionized water as raw materials to prepare acidic multi-impurity graphene dispersion, then adding alkaline solution to adjust pH value, (b) adding carbonate or bicarbonate to multi-imperfection dispersion liquid obtained in step (a), stirring and reacting to obtain a multi-amino-dispersion graphene, (c) decompressing, distilling and concentrating graphene obtained adding non-aqueous solvent to crystal not increased, and stopping adding non-queous solvent, and (d) layering, filtering, water washing, drying and removing crystal in mixed solution. USE - Method is for preparing graphene, which is used in textile, coating, energy storage and conversion device. ADVANTAGE - Method is combined with redox process, alkali reduction process and waste water solvent crystallization stripping process to obtain less defect and high graphene. The graphene stability of water-based dispersion prepared by mixing graphene and surfactant is good, which can improve compatibility of dispersion in application system. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) kind of graphene; (2) water-based graphene.