▎ 摘　　要

NOVELTY - Preparing graphene macroscopic body comprises (i) taking aqueous graphene oxide solution, mixing with ascorbic acid, uniformly stirring to obtain a mixed solution; (ii) vertically placing brush rod into the mixed solution, and fixing the brush rod in the solution; (iii) heating the solution fixed with brush rod, and using deionized water to wash to obtain graphene rotating brush; and (iv) mixing graphene oxide and hydrazine hydrate, carrying out reduction reaction to obtain graphene oxide solution, immersing graphene rotating brush into graphene solution, heating, and removing the brush block. USE - The method is useful for preparing graphene macroscopic body (claimed). ADVANTAGE - The method: produces graphene into the macroscopic body to avoid secondary pollution caused by diffusion of the graphene in the water by the graphene oxidation reactor, so that the adsorption effect of the graphene is increased; and meanwhile, by an electrolysis function, the ability of oxidizing and degrading pollutants by the reactor is improved. DETAILED DESCRIPTION - Preparing graphene macroscopic body comprises (i) taking aqueous graphene oxide solution with concentration of 2-10 mg/ml, mixing with ascorbic acid, uniformly stirring to obtain a mixed solution, where the mass ratio of the graphene oxide and ascorbic acid is 1:6-1:8; (ii) taking stick-shaped or long handle-shaped brush rod with 20-50 cm length, vertically placing into the mixed solution, and fixing the brush rod in the solution, where the length of the brush rod immersed in the solution is 1/3-2/3; (iii) heating the solution fixed with brush rod obtained in the step (ii) for 10-30 minutes at 70-90 degrees C, taking out, and using deionized water to wash for 3-5 times to obtain graphene rotating brush; and (iv) mixing graphene oxide and hydrazine hydrate according to mass ratio of 15:1-12:1, carrying out reduction reaction at 90 degrees C for 1 hour to obtain graphene oxide solution, immersing the graphene rotating brush into graphene solution, heating for 10-30 minutes at 70-90 degrees C under water bath environment, and removing the brush block to obtain the graphene macroscopic body. An INDEPENDENT CLAIM is also included for graphene oxidation reactor, comprising graphene electric chemical reactor, graphene macroscopic body, quartz sand, a cathode electrode and an anode electrode. The cathode electrode and the anode electrode are respectively arranged at the two sides inside the graphene electric chemical reactor. The graphene macroscopic body is arranged in the graphene electric chemical reactor at one side of the cathode electrode. The cathode electrode is arranged inside the graphene macroscopic body. The quartz sand is filled in the graphene electric chemical reactor at one side of the anode electrode. The anode electrode is positioned inside the quartz sand. The cathode electrode and the anode electrode are connected with a power supply. An aeration device is arranged at the bottom of the graphene electric chemical reactor. A sewage inlet and a sewage outlet are formed under the aeration device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the graphene oxidation reactor.