• 专利标题:   Preparing ferric oxide/graphene nano-composite material by sol electrostatic self-assembly method, useful e.g. for absorbing rhodamine B in wastewater, comprises mixing graphene oxide sol and ferric hydroxide sol, and magnetically stirring.
  • 专利号:   CN103496693-A, CN103496693-B
  • 发明人:   DING J, FU L, JIANG X, LIU Y, LIU T, ZHANG J, YAN X, CENG S
  • 专利权人:   UNIV ZHENGZHOU
  • 国际专利分类:   B82Y030/00, C01B031/04, C01G049/08
  • 专利详细信息:   CN103496693-A 08 Jan 2014 C01B-031/04 201418 Pages: 9 Chinese
  • 申请详细信息:   CN103496693-A CN10433900 23 Sep 2013
  • 优先权号:   CN10433900

▎ 摘  要

NOVELTY - Preparing ferric oxide/graphene nano-composite material by sol electrostatic self-assembly method, comprises preparing ferric chloride solution, dropwise adding ferric chloride solution into boiling water, and boiling to obtain ferric hydroxide sol with a surface having positive charge; dispersing graphene oxide in water to obtain graphene oxide sol with a surface having negative charge; and mixing the graphene oxide sol and ferric hydroxide sol, magnetically stirring until brown precipitate appears, separating, discarding the supernatant to obtain ferric oxide and graphene oxide composite. USE - The nano-composite material is useful for: absorbing rhodamine B in wastewater; supercapacitor electrode material; and lithium-ion battery anode material (claimed). DETAILED DESCRIPTION - Preparing ferric oxide/graphene nano-composite material by sol electrostatic self-assembly method, comprises (i) at room temperature, preparing 15-30 mass% ferric chloride solution, under magnetic stirring dropwise adding ferric chloride solution into boiling water, where the weight ratio of ferric chloride solution droplet and water is 1:1-5, and boiling for 1-5 minutes to obtain ferric hydroxide sol with a surface having positive charge; (ii) ultrasonically dispersing graphene oxide in water to obtain graphene oxide sol with a surface having negative charge, where the volume ratio of graphene oxide and water is 1:10-20; and (iii) mixing the graphene oxide sol and ferric hydroxide sol in the weight ratio of 1:1-1:50, magnetically stirring until brown precipitate appears, separating, discarding the supernatant to obtain ferric oxide and graphene oxide composite, and heating at 300-800 degrees C under nitrogen atmosphere.