• 专利标题:   Purifying graphene oxide involves preparing graphene oxide filter cake by improving Hummers method, dissolving citric acid, salicylic acid, malic acid and tartaric acid in deionized water to obtain mixed acid solution, and adding graphene oxide filter cake into mixed acid solution.
  • 专利号:   CN116119654-A
  • 发明人:   WEI R, XU P, LIU G, HAO Z, GONG Y
  • 专利权人:   SHAANXI COAL CHEM IND TECHNOLOGY RES
  • 国际专利分类:   B82Y040/00, C01B032/198
  • 专利详细信息:   CN116119654-A 16 May 2023 C01B-032/198 202351 Chinese
  • 申请详细信息:   CN116119654-A CN10059594 17 Jan 2023
  • 优先权号:   CN10059594

▎ 摘  要

NOVELTY - Purifying graphene oxide involves preparing a graphene oxide filter cake by improving the Hummers method, dissolving citric acid, salicylic acid, malic acid and tartaric acid in deionized water to obtain a mixed acid solution, and adding the graphene oxide filter cake into the mixed acid solution, and dispersing uniformly to obtain a graphene oxide dispersion, suction-filtering the graphene oxide dispersion various times until the pH of the supernatant is 5-6, and drying to obtain purified graphene oxide. USE - Method for purifying graphene oxide. ADVANTAGE - The method uses a mixed acid solution containing citric acid, salicylic acid, malic acid and tartaric acid as a solvent, which can effectively disperse the graphene oxide filter cake uniformly, avoiding the gelation caused by the increase of the viscosity of graphene oxide is beneficial to solid-liquid separation, greatly improving the cleaning and purification efficiency of graphene oxide, and avoiding the introduction of impurity ions such as chlorine (Cl) and sodium ions (Na+), invention has simple process, low cost, high purification efficiency and avoids introducing other impurity ions.