▎ 摘　　要

NOVELTY - Preparing electrochemical sensor based on graphene oxide/carbon quantum dots, comprises grinding pure sorghum distiller's grains, washing, carrying out carbonization treatment, condensing, refluxing, purifying to obtain carbon quantum dot solution, adding phosphorus pentoxide and potassium persulfate into concentrated sulfuric acid, adding graphite powder, reacting, washing to neutrality, adding pre-oxidized graphite powder into concentrated sulfuric acid, adding sodium nitrate and potassium permanganate, stirring, reacting, adding distilled water and hydrogen peroxide to terminate reaction, washing to neutrality, drying to obtain graphene oxide, synthesizing graphene oxide/carbon quantum dots, washing and pre-processing the glassy carbon electrode, coating graphene oxide/carbon quantum dot solution on the surface of the glassy carbon electrode, dropping Nafion (Sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution on the surface of the electrode, and drying. USE - Preparing electrochemical sensor based on graphene oxide/carbon quantum dots used for detecting dopamine. ADVANTAGE - The method enables to prepare graphene oxide/carbon quantum dot electrochemical sensor that has high conductivity and excellent electro-catalytic performance, and provides a more environment-friendly raw material for the preparation of the carbon quantum dot. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for method for detecting dopamine based on graphene oxide/carbon quantum dot electrochemical sensor.