▎ 摘　　要

NOVELTY - Preparation of purple fluorescent reduction-oxidation graphene quantum dot involves providing graphene oxide as raw material with nitric acid, adding sulfuric acid as an oxidizing agent, diluting with deionized water, sonicating graphene oxide solution, oxidizing with deionized water to the acid graphene, centrifuging samples, providing the resultant solution, drying resultant graphene oxide powder into the quantum dots into the quartz boat and quartz tube introducing argon gas and cooling to room temperature. USE - Preparation of purple fluorescent reduction-oxidation graphene quantum dot (claimed). ADVANTAGE - The purple fluorescent reduction-oxidation graphene quantum dot is efficiently prepared with high purity. DETAILED DESCRIPTION - Preparation of purple fluorescent reduction-oxidation graphene quantum dot involves providing graphene oxide as raw material with nitric acid, adding sulfuric acid as an oxidizing agent, and 50 mg graphene oxide in 25-35 ml nitric acid, soaking 5-15 ml sulfuric oxide graphene for 20-30 hours, performing oxidation treatment, performing ultrasonic decomposition for 10-18 hours, performing oxidation of graphene oxide solution, diluting with deionized water, sonicating graphene oxide solution, diluting solution in graphene oxide after acid treatment, oxidizing with deionized water to the acid graphene, centrifuging samples after washing, adjusting pH value of the solution to 8, providing the resultant solution at 200 plus minus 20 degrees C under high pressure for 10-14 hours, carrying out digestion solution to 8000-14000 Da, performing continuous dialysis, drying at 90 plus minus 5 degrees C, drying the resultant graphene oxide powder into the quantum dots into the quartz boat and quartz tube at 300-900 degrees C for 40-80 minutes, closing hydrogen, introducing an argon gas and cooling to room temperature.