▎ 摘　　要

NOVELTY - Preparing graphene oxide by stripping graphite oxide involves adding 30 mu m 2 g granular natural graphite, 1 g sodium nitrate to 250 mL three-necked flask at room temperature, and cooling to 0 degrees C in a cold bath; then slowly adding 50 mL concentrated sulfuric acid to the three-necked flask and stirring well, keeping the temperature of the reaction system not higher than 5 degrees C, and then adding 0.3g potassium permanganate to three-necked bottle and stirring well for 30 minutes, while keeping the temperature of the reaction system not higher than 10 degrees C for 1 hour, 7g potassium permanganate is added into three bottles in 3 batches, keeping the temperature of the reaction system not higher than 20 degrees C. The cold bath is removed, and the reaction system is heated to 35 plus minus 3 degrees C in a water bath, and stirring well for 2 hours to obtain brown suspension. USE - Method for preparing graphene oxide by stripping graphite oxide. ADVANTAGE - The method enables to prepare graphene oxide by stripping graphite oxide, which has convenient operation, low cost, good effect, and easy continuous scale production. DETAILED DESCRIPTION - 90 mL Water is slowly added to brown suspension, controlling the water addition rate control system at a temperature not exceeding 90 degrees C, and diluting the suspension at this temperature for 15 minutes, then adding 30 wt.% mixed solution by mass of water at a concentration of 30 wt.% and adding 55 ml ultrapure water at 45 degrees C to the suspension to obtain bright yellow graphite oxide dispersion. The dispersion is filtered while hot to obtain a yellow-brown filter cake. The filter cake is washed three times with 45-200 mL dilute hydrochloric acid at a concentration of 3 wt.% at 45 degrees C, and then washed for three times with ultra-pure water 150-200 mL and the filter cake is transferred to a vacuum drying oven to obtain graphite oxide. The desalted graphite oxide is prepared into a suspension with a concentration of 5.0 mg/mL with ultrapure water, and treated with dynamic microfluid of 50 MPa for 4 times. The obtained brown dispersion was centrifuged at 3000 revolutions/minute for 30 minutes, and collected to get desired product.