• 文献标题:   Sandwich-type H-2/CO2 membranes comprising of graphene oxide and sodalite crystals with adjustable morphology and size
  • 文献类型:   Article
  • 作  者:   YANG G, GUO HL, KANG ZX, FENG S, ZHAO L, MINTOVA S
  • 作者关键词:   sodalite nanocrystal, morphology control, composite membrane, gas separation
  • 出版物名称:   MICROPOROUS MESOPOROUS MATERIALS
  • ISSN:   1387-1811 EI 1873-3093
  • 通讯作者地址:   China Univ Petr East China
  • 被引频次:   1
  • DOI:   10.1016/j.micromeso.2020.110120
  • 出版年:   2020

▎ 摘  要

Sandwich-type membranes comprising of graphene oxide (GO) as a "bun" and sodalite (SOD) nanocrystals with different morphologies and sizes as an inner layer were prepared. First, the SOD nanocrystals with spheroidal (size of 30 nm) and flake-like (size of 150 nm) morphologies were synthesized from precursor suspensions containing the same amount of GO as a modifier but different amounts of water. Second, the SOD nanocrystals with different morphologies and sizes were deposited between two GO layers to form the sandwich-type membrane. The performance of the sandwich-type membranes in H-2/CO2 gas separation was optimized by tuning the properties of the SOD inner layer. The membrane containing spheroidal SOD nanocrystals showed higher H-2 permeance of 4003 +/- 1965 GPU and H-2/CO2 selectivity of 45.5 +/- 1.7 at 25 degrees C in comparison to the pristine GO membrane (1642 +/- 145 GPU and H-2/CO2 selectivity of 11.2 +/- 2.1).