▎ 摘　　要

NOVELTY - Preparation of highly dispersed graphene oxide nanoribbon solution includes cutting carbon nanotubes by adding carbon nanotube to concentrated sulfuric acid, stirring to obtain; adding potassium permanganate, stirring, heating, stirring; separating solid residue in suspension II, washing solid with distilled water; preparing graphene nanoribbons solution supercritical dispersion by mixing anhydrous ethanol and water; adding solid material with anhydrous ethanol and water mixed solution, oscillating; heating in supercritical fluid-filled high pressure container, heating, and reacting. USE - Method for preparing highly dispersed graphene oxide nanoribbon solution (claimed) used as battery, super capacitor, energy storage materials, thermal conductivity, adsorption, and catalyst carrier and coatings. ADVANTAGE - The method is simple, environment-friendly, suitable for industrial large scale production, and has low cost. The product has large surface area, developed pore structure, and strong conductivity. DETAILED DESCRIPTION - Preparation of highly dispersed graphene oxide nanoribbon solution comprises: (A) cutting carbon nanotubes by (i) adding carbon nanotube to concentrated sulfuric acid, stirring at room temperature for 4-24 hours to obtain suspension-I; (ii) adding potassium permanganate to suspension-I, stirring at room temperature for 1-10 hours, heating to 60-90 degrees C for 1-10 hours, stirring in 0 degrees C ice bath for 10 minutes to 2 hours to obtain suspension-II; (iii) separating solid residue in suspension II, washing solid with distilled water until pH value of filtrate is 7; and (B) preparing graphene nanoribbons solution supercritical dispersion by (i) mixing anhydrous ethanol and water at a ratio of 0-10:1; (ii) adding solid material with anhydrous ethanol and water mixed solution, ultrasonically oscillating at room temperature for 0.5-2 hours to obtain suspension-III; (iii) placing suspension-III into supercritical fluid-filled high pressure container, heating to 300-650 and 24-30 MPa, reacting for 1-8 hours, and naturally cooling. The mass-to-volume ratio of carbon nanotubes and sulfuric acid is 1:50-1000. The mass ratio of carbon nanotubes and potassium permanganate is 1:1-10.