▎ 摘　　要

NOVELTY - Preparing graphene oxide by electrochemical method involves mixing the crystalline flake graphite and concentrated sulfuric acid, gradually dropping hydrogen peroxide and stirring under the low temperature environment to obtain crystalline flake graphite, uniform mixture of concentrated sulfuric acid and hydrogen peroxide, standing the mixture to obtain expanded graphite, putting the expanded graphite into the container wall opened with through hole, the platinum wire is inserted and assembled into electrochemical anode, the conductive material is used as electrochemical cathode, the anode and cathode are immersed in the electrolyte, peeling by applying voltage to obtain the graphene oxide dispersion and separating and drying the graphene oxide dispersion liquid to obtain product. USE - Method for electrochemically preparing graphene oxide used to super capacitor, photocatalytic, analysis detection, biological medicine and fuel cell. ADVANTAGE - The method avoids the fast falling of graphite sheet in electrochemical oxidation, stripping process, the product does not contain any metal impurities, graphene oxidation degree is controllable, and the device is low in price, simple in operation process, safety easy to scale production of graphene oxide. The method limits the expanded graphite coated with sulphuric acid in the container with through hole as electrode, limiting the expansion graphite in the anode area of electrochemical reaction, ensuring the sufficient electrochemical intercalation and peeling reaction, at the same time, separating the oxidized graphene from the side wall through hole of the container out of the reaction area, and ensuring the normal operation of subsequent electrochemical peeling, improving yield of the graphene oxide powder.