Effective enhancement of gas separation performance in mixed matrix membranes using core/shell structured multi-walled carbon nanotube/graphene oxide nanoribbons

Qingzhong Xue*, Xinglong Pan, Xiaofang Li, Jianqiang Zhang, Qikai Guo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

Novel core/shell structured multi-walled carbon nanotube/graphene oxide nanoribbons (MWCNT@GONRs) nanohybrids were successfully prepared using a modified chemical longitudinal unzipping method. Subsequently, the MWCNT@GONRs nanohybrids were used as fillers to enhance the gas separation performance of polyimide based mixed matrix membranes (MMMs). It is found that MMMs concurrently exhibited higher gas selectivity and higher gas permeability compared to pristine polyimide. The high gas selectivity could be attributed to the GONRs shell, which provided a selective barrier and large gas adsorbed area, while the high gas permeability resulted from the hollow structured MWCNTs core with smooth internal surface, which acted as a rapid transport channel. MWCNT@GONRs could be promising candidates to improve gas separation performance of MMMs due to the unique microstructures, ease of synthesis and low filling loading.

Original languageEnglish
Article number065702
Number of pages10
JournalNanotechnology
Volume28
Issue number6
DOIs
Publication statusPublished - 10-Feb-2017

Keywords

  • MWCNT@GONRs
  • normalized selectivity
  • selective barrier
  • transport channel
  • core/shell structure
  • GRAPHENE OXIDE
  • CO2 SEPARATION
  • POLYMER NANOCOMPOSITES
  • INORGANIC FILLERS
  • ZIF-8 MEMBRANES
  • NANOTUBES
  • TRANSPORT
  • COMPOSITES
  • PROPYLENE/PROPANE
  • PERMEABILITY

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