▎ 摘　　要

NOVELTY - An electrochemically reduced graphene quantum dot/polypyrrole composite material preparing method involves dispersing 0.2 mL pyrrole monomer in 10 mL of 0.1 mol/L sulfuric acid solution, dissolving 0.68 g oxidant in 5 mL deionized water and diluting with water to 10 mL, adding aqueous solution of oxidant dropwise to the pyrrole in a sulfuric acid solution of the body, dispersing polypyrrole ultrasonically in an aqueous solution of graphene quantum dots, allowing to stand and freeze-drying, dispersing the graphene quantum dot/polypyrrole into 2 mg/mL dispersion and pipetting with a pipette 10 mu L onto the surface of the glassy carbon electrode and drying by infrared lamp, using the graphene quantum dot/polypyrrole modified glassy carbon electrode as the working electrode, the saturated calomel electrode as the auxiliary electrode and reducing electrode and the graphene quantum dot/polypyrrole by cyclic voltammetry in an electrolyte to obtain the finished product. USE - Method for preparing electrochemically reduced graphene quantum dot/polypyrrole composite material. ADVANTAGE - The method enables preparing electrochemically reduced graphene quantum dot/polypyrrole composite material with excellent electrochemical performance, in simple manner. DETAILED DESCRIPTION - An electrochemically reduced graphene quantum dot/polypyrrole composite material preparing method involves dispersing 0.2 mL pyrrole monomer in 10 mL of 0.1 mol/L sulfuric acid solution, dissolving 0.68 g oxidant in 5 mL deionized water and diluting with water to 10 mL, adding aqueous solution of oxidant dropwise to the pyrrole in a sulfuric acid solution of the body, magnetic stirring at room temperature for 5 hours and finally the obtained product polypyrrole is centrifuging, washing and freeze-drying at -54 degrees C, dispersing polypyrrole ultrasonically in an aqueous solution of graphene quantum dots, allowing to stand, centrifuging, washing and freeze-drying at -54 degrees C, dispersing the graphene quantum dot/polypyrrole into a 2 mg/mL dispersion and pipetting with a pipette 10 mu L onto the surface of the glassy carbon electrode and drying by infrared lamp, using the three-electrode system, using the graphene quantum dot/polypyrrole modified glassy carbon electrode as the working electrode, the saturated calomel electrode as the auxiliary electrode and the platinum plate electrode, reducing electrode and the graphene quantum dot/polypyrrole by cyclic voltammetry in an electrolyte of pH is 7 to obtain the finished product, and finally 1 mol/L sulfuric acid is used as an electrolyte, using electrochemical reduction of graphene quantum dot/polypyrrole modified electrode as the working electrode and carrying out constant current charge-discharge test and cycle life test of electrochemically reduced graphene quantum dots/polypyrrole.