▎ 摘 要
NOVELTY - Preparation of coal-based graphene quantum dots comprises mixing pulverized coal with stripping solvent, adding accelerant, ultrasonically dispersing, transferring in high-pressure reaction kettle with magnetic stirrer, carrying out hydrothermal reaction, cooling and centrifuging. USE - Method for preparing coal-based graphene quantum dots (claimed). ADVANTAGE - The product is low-cost and has good water solubility and high fluorescence efficiency. The method is simple and has high yield.