• 专利标题:   Preparing porous graphene oxide nanofiltration membranes useful in dye separation, comprises suction filtering the porous graphene oxide nanosheets onto the base membrane.
  • 专利号:   CN112915787-A
  • 发明人:   JIANG Z, GUAN J, ZHANG R
  • 专利权人:   UNIV TIANJIN
  • 国际专利分类:   B01D061/00, B01D067/00, B01D071/02, C02F001/44, C02F101/30
  • 专利详细信息:   CN112915787-A 08 Jun 2021 B01D-061/00 202157 Pages: 10 Chinese
  • 申请详细信息:   CN112915787-A CN10183596 08 Feb 2021
  • 优先权号:   CN10183596

▎ 摘  要

NOVELTY - Preparing porous graphene oxide nanofiltration membranes, comprises etching graphene oxide nanosheets chemically by concentrated acid to realize in-plane pore formation of the graphene oxide nanosheets, and preparing the porous graphene oxide nanosheets; through the vacuum-assisted self-assembly process, suction filtering the porous graphene oxide nanosheets onto the base membrane to obtain a porous graphene oxide nanofiltration membrane. The pure water permeation flux of the membrane is 30.5-120.9 Lm-2h-1bar-1, and the rejection rate of the four dyes: methyl blue, chrome black T, Congo red and Alcian blue are all greater than 95%. The concentrated acid is concentrated sulfuric acid, concentrated nitric acid, and concentrated phosphoric acid. The base membrane material is polyethersulfone, mixed cellulose, cellulose acetate or polycarbonate. USE - The porous graphene oxide nanofiltration membrane is useful in dye separation. ADVANTAGE - The method is simple and convenient.