• 专利标题:   Preparation of small-size graphene oxide, involves mixing purified aphanitic graphite, concentrated acid and strong oxidant, reacting, pouring into excess deionized water and adding hydrogen peroxide aqueous solution to light suspension.
  • 专利号:   CN105776189-A
  • 发明人:   ZHAO Y, MA C, LI S
  • 专利权人:   UNIV SHANXI
  • 国际专利分类:   C01B031/04
  • 专利详细信息:   CN105776189-A 20 Jul 2016 C01B-031/04 201663 Pages: 7 Chinese
  • 申请详细信息:   CN105776189-A CN10067089 30 Jan 2016
  • 优先权号:   CN10067089

▎ 摘  要

NOVELTY - The preparation of small-size graphene oxide, involves mixing purified aphanitic graphite, concentrated acid and strong oxidant uniformly, reacting at 80-120 degrees C in a closed environment, pouring slowly reaction mixture into excess deionized water, mixing and adding 25 %mass concentration hydrogen peroxide aqueous solution to a suspension of brown-yellow or light yellow, pickling, washing until pH value reaches to 6-7, and carrying out centrifugal separation. The volume ratio of purified aphanitic graphite and concentrated acid is 1:20-80. USE - Preparation of small-size graphene oxide (claimed). ADVANTAGE - The method enables preparation of economical small-size graphene oxide with high purity and non-toxicity by simple process. DETAILED DESCRIPTION - The preparation of small-size graphene oxide, involves mixing purified aphanitic graphite, concentrated acid and strong oxidant uniformly, reacting at 80-120 degrees C in a closed environment, pouring slowly reaction mixture into excess deionized water, mixing and adding 25 %mass concentration hydrogen peroxide aqueous solution to a suspension of brown-yellow or light yellow, pickling, washing until pH value reaches to 6-7, and carrying out centrifugal separation. The volume ratio of purified aphanitic graphite and concentrated acid is 1:20-80. The mass ratio of purified aphanitic graphite with strong oxidant ratio is 1:3-10.