▎ 摘　　要

NOVELTY - Preparing graphene oxide involves taking concentrated sulfuric acid, graphite powder and sodium nitrate into a reaction vessel, and completing the reaction at 6 degrees C or less, adding potassium permanganate, fully reacting under low temperature stirring below 10 degrees C. The deionized water is added to the graphene oxide preparation reactor at 95 degrees C and stirred. The reaction is completed, hydrogen peroxide solution and hydrochloric acid solution are sequentially added to the graphene oxide preparation reactor, and after fully reacted by stirring. The mixed solution is taken out from the graphene oxide preparation reactor, mixed solution obtained is subjected to low-speed centrifugal washing, the pH of the mixed solution is adjusted to be neutral to obtain neutral graphite oxide solution. The graphite oxide solution is diluted, and the upper layer is suspended after ultrasonic vibration peeling. The turbid liquid is dried. USE - Method for preparing graphene oxide. ADVANTAGE - The method enables to prepare graphene oxide which improves the preparation efficiency of graphene oxide. DETAILED DESCRIPTION - Preparing graphene oxide involves taking concentrated sulfuric acid, graphite powder and sodium nitrate into a reaction vessel, and completing the reaction at 6 degrees C or less, adding potassium permanganate, fully reacting under low temperature stirring below 10 degrees C. The deionized water is added to the graphene oxide preparation reactor at 95 degrees C and stirred. The reaction is completed, hydrogen peroxide solution and hydrochloric acid solution are sequentially added to the graphene oxide preparation reactor, and after fully reacted by stirring. The mixed solution is taken out from the graphene oxide preparation reactor, mixed solution obtained is subjected to low-speed centrifugal washing, the pH of the mixed solution is adjusted to be neutral to obtain neutral graphite oxide solution. The graphite oxide solution is diluted, and the upper layer is suspended after ultrasonic vibration peeling. The turbid liquid is dried to obtain sheet of graphene oxide in graphene oxide preparation reaction kettle which comprises housing (1), reaction barrel (2), feeding tube (3), collecting tube (4), pillar (5), stirring module (6), oscillating module and the supporting spring. The reaction tank is located inside the casing and reaction tank is used for the reactant reaction. The feeding pipe is located at the upper portion of the reaction tank, and the feeding pipe is used for discharging the reactant. The collecting tube is located at the lower end of the reaction barrel, and the collecting tube is for collecting the mixed solution after the reaction. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene oxide preparation reaction kettle. Housing (1) Reaction barrel (2) Feeding tube (3) Collecting tube (4) Pillar (5) Stirring module (6)