▎ 摘　　要

NOVELTY - Preparation of aqueous dispersion of graphene oxide involves: (1) introducing component (A) into 1000 ml beaker, slowly adding concentrated sulfuric acid to the beaker, placing the beaker in an ice water bath, and magnetically stirring; (2) weighing potassium permanganate and sodium permanganate into the beaker, stirring, maintaining the temperature of mixture in the beaker at below 30 degrees C and continuously stirring; (3) placing the beaker in an ice water bath, slowly adding 300 ml deionized water, stirring, maintaining the temperature of mixture in the beaker at below 98 degrees C, then slowly adding 30 ml 30 %mass hydrogen peroxide aqueous solution and continuously stirring; (4) centrifuging the mixed solution and dialyzing to obtain a graphite oxide suspension; and (5) dispersing the suspension into deionized water to prepare a suspension liquid, ultrasonically dispersing the liquid for 1 hour, and removing the non-stripped graphite oxide by centrifuging at 3000 rpm for 30 minutes. USE - The method is useful for preparing aqueous dispersion of graphene oxide, which is useful for supercapacitor (claimed). DETAILED DESCRIPTION - The raw materials of component (A) used in step (1) comprise 5 g graphite, 1 g sodium nitrate, 2 g potassium nitrate and 2 g sodium bicarbonate. The raw materials used in step (1) comprise 150 ml concentrated sulfuric acid. The raw materials used in step (2) comprise 15 g potassium permanganate and 2 g sodium permanganate. The continuously stirring step in step (2) is carried out at room temperature for 24 hours. The magnetically stirring step in step (1) is carried out for 1 hour. In step (4), the centrifuging step is carried out at a speed of 8000 rpm for 30 minutes. In step (5), the suspension liquid has a mass fraction of 1 mg/ml. The step (4) involves, after centrifuging, removing the upper liquid, taking out the precipitate, washing the precipitate with 10 vol.% hydrochloric acid aqueous solution, again centrifuging for 6 times, taking out the precipitate and putting the precipitate into a dialysis bag to carry out dialysis for three weeks to completely remove salt ions and acid radical ions to obtain a graphite oxide suspension.