Molecular-Scale Hybrid Membranes Derived from Metal-Organic Polyhedra for Gas Separation

Xinlei Liu*, Xuerui Wang, Anastasiya V. Bavykina, Liangyong Chu, Meixia Shan, Anahid Sabetghadam, Hozanna Miro, Freek Kapteijn, Jorge Gascon

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

25 Citations (Scopus)
35 Downloads (Pure)

Abstract

The preparation and the performance of mixed matrix membranes based on metal-organic polyhedra (MOPs) are reported. MOP fillers can be dispersed as discrete molecular units (average 9 nm in diameter) when low filler cargos are used. In spite of the low doping amount (1.6 wt %), a large performance enhancement in permeability, aging resistance, and selectivity can be achieved. We rationalize this effect on the basis of the large surface to volume ratio of the filler, which leads to excellent dispersion at low concentrations and thus alters polymer packing. Although membranes based only on the polymer component age quickly with time, the performance of the resulting MOP-containing membranes meets the commercial target for postcombustion CO2 capture for more than 100 days.

Original languageEnglish
Pages (from-to)21381-21389
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number25
DOIs
Publication statusPublished - 27 Jun 2018

Keywords

  • cage
  • gas separation
  • hybrid membrane
  • metal-organic polyhedron
  • molecular scale

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