Metal-Organic Framework Membranes for Molecular Separations

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Inorganic Membranes".

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 6214

Special Issue Information

Dear Colleagues,

Metal-organic frameworks (MOFs) are a class of crystalline microporous/mesoporous materials consisting of metal clusters coordinated to organic linkers. The well-defined pore structure with diverse chemical environment allow MOFs for addressing several critical issues in membranes for various chemical separations, such as gas separations, organic solvent purification, desalination, and removal of dyes or heavy metals in wastewater. The research for MOF membranes in all kinds, involving pure MOF membranes, mixed matrix membranes, and MOF-derived membranes is growing, as commercialized products of MOF membranes have yet been available. The advancement in MOF membranes requires studies from molecular-level insights into mass transport in MOFs to the industrial-level application of MOF membrane in a separation unit.

This Special Issue covers the most recent advance in pure MOF membranes, MOF-containing mixed matrix membranes, and MOF-derived membranes for various types of molecular separations. We survey the state-of-the-art computational or experimental developments of MOF-based membranes for gas separation (molecular sieves or membrane adsorbers), pervaporation, vapor permeation, desalination, and dye removal. We invite you to contribute original research papers, communications, or review articles. We hope a comprehensive review on MOF membranes for molecular separations provided in this Special Issue can bring a new perspective to the community.

Prof. Dun-Yen Kang
Guest Editor

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Keywords

  • MOF membrane
  • Mixed matrix membrane
  • MOF derived membrane
  • Molecular sieve
  • Gas separation
  • Membrane adsorber
  • Desalination
  • Pervaporation
  • Vapor permeation
  • Solvent recovery
  • Dye removal

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Published Papers (1 paper)

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18 pages, 3413 KiB  
Article
CO2/N2 Separation Properties of Polyimide-Based Mixed-Matrix Membranes Comprising UiO-66 with Various Functionalities
by Chong Yang Chuah, Junghyun Lee, Juha Song and Tae-Hyun Bae
Membranes 2020, 10(7), 154; https://doi.org/10.3390/membranes10070154 - 17 Jul 2020
Cited by 41 | Viewed by 5841
Abstract
Nanocrystalline UiO-66 and its derivatives (containing -NH2, -Br, -(OH)2) were developed via pre-synthetic functionalization and incorporated into a polyimide membrane to develop a mixed-matrix membrane (MMM) for CO2/N2 separation. Incorporation of the non-functionalized UiO-66 nanocrystals into [...] Read more.
Nanocrystalline UiO-66 and its derivatives (containing -NH2, -Br, -(OH)2) were developed via pre-synthetic functionalization and incorporated into a polyimide membrane to develop a mixed-matrix membrane (MMM) for CO2/N2 separation. Incorporation of the non-functionalized UiO-66 nanocrystals into the polyimide membrane successfully improved CO2 permeability, with a slight decrease in CO2/N2 selectivity, owing to its large accessible surface area. The addition of other functional groups further improved the CO2/N2 selectivity of the polymeric membrane, with UiO-66-NH2, UiO-66-Br, and UiO-66-(OH)2 demonstrating improvements of 12%, 4%, and 17%, respectively. Further evaluation by solubility–diffusivity analysis revealed that the functionalized UiO-66 in MMMs can effectively increase CO2 diffusivity while suppressing N2 sorption, thus, resulting in improved CO2/N2 selectivity. Such results imply that the structural tuning of UiO-66 by the incorporation of various functional groups is an effective strategy to improve the CO2 separation performance of MMMs. Full article
(This article belongs to the Special Issue Metal-Organic Framework Membranes for Molecular Separations)
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