Solid-Vapor Interface Engineered Covalent Organic Framework Membranes for Molecular Separation

Niaz Ali Khan, Runnan Zhang, Hong Wu, Jianliang Shen, Jinqiu Yuan, Chunyang Fan, Li Cao, Mark A. Olson, Zhongyi Jiang

Research output: Contribution to journalArticlepeer-review

159 Scopus citations


Covalent organic frameworks (COFs) with intrinsic, tunable, and uniform pores are potent building blocks for separation membranes, yet poor processing ability and long processing time remain grand challenges. Herein, we report an engineered solid-vapor interface to fabricate a highly crystalline two-dimensional COF membrane with a thickness of 120 nm in 9 h, which is 8 times faster than that in the reported literature. Due to the ultrathin nature and ordered pores, the membrane exhibited an ultrahigh permeance (water, ∼411 L m-2 h-1 bar-1 and acetonitrile, ∼583 L m-2 h-1 bar-1) and excellent rejection of dye molecules larger than 1.4 nm (>98%). The membrane exhibited long-term operation which confirmed its outstanding stability. Our solid-vapor interfacial polymerization method may evolve into a generic platform to fabricate COFs and other organic framework membranes.
Original languageEnglish (US)
Pages (from-to)13450-13458
Number of pages9
JournalJournal of the American Chemical Society
Issue number31
StatePublished - Aug 5 2020
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • Biochemistry
  • Colloid and Surface Chemistry
  • General Chemistry
  • Catalysis


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