▎ 摘　　要

NOVELTY - Preparing large-scale graphene aqueous phase assisted by riboflavin sodium phosphate involves immersing expanded graphite in aqueous solution of riboflavin sodium phosphate and stirring to make intercalate between graphene sheet to obtain expanded graphite intercalated with riboflavin sodium phosphate, controlling the concentration of riboflavin sodium phosphate aqueous solution to 5-100 mg/mL, subjecting the obtained aqueous phase exfoliation of the riboflavin sodium phosphate-intercalated expanded graphite to mechanical treatment to obtain a large-sized graphene aqueous dispersion. USE - Method for preparing large-scale graphene aqueous phase assisted by riboflavin sodium phosphate. ADVANTAGE - The method is eco-friendly and safe, suitable for large-scale industrial production, and effectively solves the problems of environment protection, production efficiency, and connection with downstream application. DETAILED DESCRIPTION - Preparing large-scale graphene aqueous phase assisted by riboflavin sodium phosphate involves immersing expanded graphite in aqueous solution of riboflavin sodium phosphate and stirring to make intercalate between graphene sheet to obtain expanded graphite intercalated with riboflavin sodium phosphate, controlling the concentration of riboflavin sodium phosphate aqueous solution to 5-100 mg/mL, subjecting the obtained aqueous phase exfoliation of the riboflavin sodium phosphate-intercalated expanded graphite to mechanical treatment, to obtain a large-sized graphene aqueous dispersion, controlling the concentration of graphene dispersion to be 0.01-200 mg/mL, centrifuging or filtering the obtained large-size graphene aqueous dispersion, removing excess riboflavin sodium phosphate molecule to obtain a graphene filter cake, drying to obtain a large-sized graphene powder, and dispersing uniformly the obtained graphene filter cake or the dried graphene powder in deionized water or various organic solvent to obtain large-scale graphene aqueous phase. DESCRIPTION OF DRAWING(S) - The drawing shows a transmission electron microscope image of the large-sized graphene.