▎ 摘　　要

NOVELTY - Preparing graphene quantum dot with adjustable oxygen content comprises using electrochemical circulation voltammetry in appear brown color containing impurities of graphene quantum dot aqueous solution, impurities containing brown graphene quantum dot aqueous solution by dialyzing, obtaining the light yellow and transparent graphene quantum dot aqueous solution, using electrochemical method and regulating and controlling the redox degree for electrolyte, preparing out different graphene quantum dot with oxygen content. USE - The method is useful for preparing graphene quantum dot with adjustable oxygen content (claimed). ADVANTAGE - The method is simple, environmentally friendly, reduces production cost, and is easy for industrialization. DETAILED DESCRIPTION - Preparing graphene quantum dot with adjustable oxygen content comprises using electrochemical circulation voltammetry in appear brown color containing impurities of graphene quantum dot aqueous solution, impurities containing brown graphene quantum dot aqueous solution by dialyzing, obtaining the light yellow and transparent graphene quantum dot aqueous solution, using electrochemical method and regulating and controlling the redox degree for electrolyte, preparing out different graphene quantum dot with oxygen content; where the implementation method is: using ultraviolet radiation reaction device of number 1 reaction container in hydrogen peroxide and phosphate buffer liquid as electrolyte solution, where number 2 reaction container contains phosphate buffer liquid as electrolyte solution, no 1 and no 2 signal response device is connected in parallel, with certain length, using electrochemical circulation voltammetry in high concentration oxygen with graphene quantum dot.