▎ 摘　　要

NOVELTY - Graphite oxide is prepared by adding graphite powder and sodium nitrate into concentrated sulfuric acid, adding potassium permanganate, stirring, adding hydrogen peroxide, filtering, centrifuging, drying, and grinding. Then, graphene oxide is prepared using graphite oxide powder. The obtained graphene oxide is added into three-necked flask, reductant VC is added, reacted, sodium borohydride is added, reacted, filtered, and washed. Stable dispersion of graphene is obtained using N,N-dimethylformamide graphene dispersion, and coated on hydrophilically treated glass by spin coating. USE - Preparation of graphene transparent conductive film (claimed). ADVANTAGE - The graphene transparent conductive film having light transmittance of 70% and conductivity of 92 S/comprising, is prepared with high utilization of raw material and controllable thickness, by simple and economical method. DETAILED DESCRIPTION - Graphite oxide is prepared by pouring 108-138 ml concentrated sulfuric acid into ice-bath, adding graphite powder and 1.5-0.75 g sodium nitrate, magnetically stirring for 30 minutes, adding 4.5 g potassium permanganate, magnetically stirring at 35 degrees C in a water bath l0-l2 hours, slowly adding 4.5 g potassium permanganate, controlling reaction temperature at 35 degrees C, magnetically stirring for l0-l2 hours, pouring reaction mixture into 200 ml beaker containing ice, stirring constantly with glass rod, adding 30% hydrogen peroxide dropwise until solution is cash yellow, filtering while hot, washing once with 5% hydrochloric acid, washing with deionized water until solution is neutral, performing low-speed centrifugation at a speed of 5000 rpm for 7 minutes for removing large particles, ultrasonically treating for 5 minutes, drying at 60 degrees C for 24 hours, obtaining graphite oxide, and grinding into powder. Then, graphene oxide is prepared by adding graphite oxide powder into a beaker containing 100 ml deionized water, ultrasonically treating for 2-3 hours, dispersing graphite oxide completely in water, forming suspension of graphene oxide, centrifuging supernatant at a speed of 5000 rpm for 30 minutes, sealing, and maintaining. The obtained graphene oxide is added into three-necked flask, maintained at 100 degrees C, 1 g reductant VC is added, reacted in oil bath under reflux condenser for 24 hours, 1 g sodium borohydride or 1 g hydrazine is added, reacted for 24 hours, filtered, reduced product is washed several times with deionized water, and dried at 60 degrees C in oven, to obtain graphene. Then, glass is subjected to hydrophilic treatment by ultrasonically cleaning glass with acetone, ethanol and deionized water, respectively for 10 minutes, rinsing with deionized water, drying by blowing nitrogen, slowly pouring 30% hydrogen peroxide into 98 %mass concentrated sulfuric acid, such that the volume ratio of sulfuric acid and hydrogen peroxide is 7:3, adding sulfuric acid/hydrogen peroxide solution into cleaned glass to-be-processed, treating at 80 degrees C for 30 minutes, cleaning with ethanol and deionized water, and drying by blowing nitrogen. A stable dispersion of graphene is obtained using N,N-dimethylformamide graphene dispersion. The obtained dispersion is coated on glass by spin coating using spin coating machine by wetting graphene oxide dispersion liquid on glass for 60 second, rotating at speed of 600 rpm for 60 second, dispersing on glass, rotating at a speed of 800 rpm for 60 seconds, forming thin film, rotating at speed of 1600 rpm for 60 seconds, evaporating solvent, and drying, to obtain graphene transparent conductive film.