▎ 摘　　要

NOVELTY - Preparation of coal-based graphene-quantum dots involves mixing pulverized coal and a non-strong oxidizing acidic solution, heating, refluxing, performing vacuum filtration, obtaining pretreated pulverized coal, uniformly mixing resultant with nitric acid solution, dispersing, adding to a reactor, hydrothermally reacting, obtaining a graphene-quantum dot solution, blowing nitrogen and stirring. USE - Preparation of coal-based graphene-quantum dots. ADVANTAGE - The method enables simple and rapid preparation of coal-based graphene-quantum dots with high yield of more than 66%, under mild reaction conditions.