Oriented UiO-67 metal–organic framework membrane with fast and selective lithium-ion transport

Rongming Xu, Yuan Kang, Weiming Zhang, Xiwang Zhang, Bingcai Pan

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58 Citations (Scopus)


Metal–organic frameworks (MOFs) membranes with high pore density and tunable pore size down to the subnanoscale exhibit great potential in ion separation when appropriately designed and prepared. By a washing-assisted secondary growing method, a well intergrown UiO-67 membrane with preferential growth along the [022] direction was synthesized on a polyvinylpyrrolidone (PVP)-modified AAO substrate. Because of the oriented growth of UiO-67 nanocrystals, highly interconnected ion-transporting channels are created throughout the UiO-67/AAO membrane capable of achieving an ultrahigh Li+ permeance of 27.01 mol m−2 h−1 as well as very decent Li+/Mg2+ selectivity of up to 159.4. Molecular dynamics simulations reveal that the high selectivity is associated with the large disparity of the transport energy barrier between Li+ and Mg2+, which is caused by different extents of ion dehydration in unique bimodal and oriented membrane channels.

Original languageEnglish
Article numbere202115443
Number of pages6
JournalAngewandte Chemie - International Edition
Issue number3
Publication statusPublished - 17 Jan 2022


  • Ion dehydration
  • Ion separation
  • Lithium ion fast transport
  • Metal-organic frameworks
  • Subnanometer pore membrane

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