• 专利标题:   Ferroferric oxide magnetic particles uniformly coated with graphene is carboxylated reduced graphene oxide, and ferroferric oxide magnetic particles coated on surface in form of particles, and coating is uniform and dense.
  • 专利号:   CN111099584-A
  • 发明人:   LI N, HUANG G, XIAO H
  • 专利权人:   TECH INST PHYSICS CHEM CHINESE ACAD
  • 国际专利分类:   C01B032/194, C01G049/08
  • 专利详细信息:   CN111099584-A 05 May 2020 C01B-032/194 202042 Pages: 11 Chinese
  • 申请详细信息:   CN111099584-A CN11258945 26 Oct 2018
  • 优先权号:   CN11258945

▎ 摘  要

NOVELTY - Ferroferric oxide magnetic particles uniformly coated with graphene is carboxylated reduced graphene oxide, its flake size is 0.5-3 mu m, the thickness of a single plate is 0.55-3.74 nm, and the number of plate layers is less than 10 layers. The ferroferric oxide magnetic particles are coated on the surface are in the form of particles, with a particle size range of 5-12nm. The coating is uniform and dense without impurities, and the coating rate is over 95%. USE - Ferroferric oxide magnetic particles uniformly coated with graphene. ADVANTAGE - The ferroferric oxide magnetic particles uniformly coated with graphene has subsequent design, and helps to prepare more excellent performance absorbing materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for uniformly coating graphene with nano ferromagnetic particles, which involves: (A) adding graphene and the alcohol solution of graphene in ratio of 1:100-500, and stirring to obtain a dispersed solution of graphene; (B) adding the iron salt and the graphene dispersion solution in a mass ratio of 1:1-5:1, and performing the pulverization and ultrasound to obtain a mixed solution containing iron salt and graphene; (C) dispersing the alkali solution into the alcohol solution in volume ratio of 1-4:10, and stirring uniformly to obtain the alkali alcohol solution; (D) adding the alkali alcohol solution to the mixed solution containing iron salt and graphene, performing ultrasonic cell crushing, and transferring resulting solution to a reaction kettle and reacting at 180-240 degrees C for 2-4 hours; and (E) filtering under the action of a magnet, washing to neutrality under the action of centrifugation, and vacuum drying to obtain graphene powder coated with nanometer ferromagnetic particles.