▎ 摘　　要

NOVELTY - Hydrothermal synthesis of oxygen and chlorine co-doped graphene quantum dot is carried out by dissolving sugar as carbon source and oxygen doping source into water to obtain 0.1-15 wt.% sugar aqueous solution; adding sugar aqueous solution with hydrochloric acid and reacting at 120-220 degrees C for 0.5-10 hours, where mole ratio of carbon in sugar to hydrochloric acid is 5:1-1:10; and after the reaction is finished, cooling the reaction liquid to room temperature, and carrying out dialysis purification to obtain oxygen and chlorine co-doped graphene quantum dot. USE - Method for hydrothermal synthesis of oxygen and chlorine co-doped graphene quantum dot (claimed). ADVANTAGE - The method can increase graphene quantum dot electronic transition level by introducing oxygen and chlorine, and the prepared co-doped graphene quantum dot has excellent light emitting property.