• 专利标题:   Preparation of graphene based on ascorbic acid involves ultrasonically treating solution of graphite oxide and deionized water, and stewing obtained graphene oxide solution mixed with ascorbic acid to obtain graphene solution.
  • 专利号:   CN101602504-A, CN101602504-B
  • 发明人:   GUO S, ZHANG J
  • 专利权人:   UNIV SHANGHAI JIAOTONG
  • 国际专利分类:   B82B003/00, C01B031/04
  • 专利详细信息:   CN101602504-A 16 Dec 2009 C01B-031/04 201008 Pages: 9 Chinese
  • 申请详细信息:   CN101602504-A CN10054919 16 Jul 2009
  • 优先权号:   CN10054919

▎ 摘  要

NOVELTY - Graphene based on ascorbic acid is prepared by preparing a brown graphite suspension; preparing a glassy yellow graphite diluent; preparing graphite oxide solids; dispersing graphite oxide into deionized water, ultrasonically treating for 1 hour to separate graphene oxide to obtain a graphene oxide solution; mixing the graphene oxide solution with ascorbic acid sufficiently and then stewing them to obtain a graphene solution. USE - Method for preparing graphene based on ascorbic acid (claimed). ADVANTAGE - The method uses the ascorbic acid as a reducing agent; shortens the reaction time under the condition of adding no other stabilizing agents; obtains a single-layer graphene having a thickness of 0.8-1.2 nm; and is good for the production of graphene in batches. DETAILED DESCRIPTION - Preparation of graphene based on an ascorbic acid includes: (A) cooling graphite and sodium nitrate at room temperature, adding concentrated sulfuric acid and stirring, then adding potassium permanganate to the concentrated sulfuric acid in batches within 1 hour during stirring, raising the temperature to 35 plus minus 3 degrees C by using a water bath, and adding deionized water after 2 hours of reaction to obtain a brown graphite suspension; (B) continuing the reaction of the obtained brown graphite suspension for 15 minutes, and then adding hydrogen peroxide and deionized water to the graphite suspension to obtain a glassy yellow graphene solution; (C) filtering the glassy yellow graphene solution to obtain a tan filter cake which is washed with acid first and then dispersed in water, and centrifuging to obtain a graphite oxide gel which then goes through drying treatment to obtain a graphite oxide solid; (D) dispersing the graphite oxide into deionized water, and ultrasonically treating for 1 hour to separate a graphene oxide to obtain a graphene oxide solution; and (E) mixing the graphene oxide solution with the ascorbic acid sufficiently and then stewing them to obtain a graphene solution.