▎ 摘　　要

NOVELTY - Manufacture of graphene involves pre-processing graphite, oxidizing the pre-processed graphite using acid solution, removing oxidized graphene, and reducing oxidized graphene using reducing agent. The purity of the graphite is 90% or more. The graphite is purified using pretreatment composition containing chelating ligand, iron-oxide remover, surfactant, anionic/nonionic polymer dispersing agent and distilled water. USE - Manufacture of graphene. ADVANTAGE - The method is environmentally-friendly, and efficiently and economically provides graphene, by simple method.