▎ 摘 要
NOVELTY - Preparation of large-scale graphene oxide, involves sequentially adding concentrated sulfuric acid, concentrated nitric acid and graphite to form graphite intercalation compound, obtaining expanded graphite through microwave treatment, then reacting with strong acid to obtain pre-oxidized graphite, oxidizing and stripping potassium dichromate. USE - Preparation of large-scale graphene oxide (claimed).