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Polycrystalline Advanced Microporous Framework Membranes for Efficient Separation of Small Molecules and Ions
Author(s) -
Hou Jue,
Zhang Huacheng,
Simon George P.,
Wang Huanting
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201902009
Subject(s) - membrane , microporous material , materials science , desalination , nanotechnology , gas separation , selectivity , fabrication , metal organic framework , nanometre , crystallite , porosity , chemical engineering , organic chemistry , adsorption , chemistry , composite material , catalysis , medicine , biochemistry , alternative medicine , pathology , engineering , metallurgy
Abstract Advanced porous framework membranes with excellent selectivity and high permeability of small molecules and ions are highly desirable for many important industrial separation applications. There has been significant progress in the fabrication of polycrystalline microporous framework membranes (PMFMs) in recent years, such as metal–organic framework and covalent organic framework membranes. These membranes possess small pore sizes, which are comparable to the kinetic diameter of small molecules and ions on the angstrom scale, very low thickness, down to tens to hundreds of nanometers, highly oriented crystalline structures, hybrid membrane structures, and specific functional groups for enhancing membrane selectivity and permeability. Recent advances in the fabrication methods of advanced PMFMs are summarized. Following this, four emerging separation applications of these advanced microporous framework membranes, including gas separation, water desalination, ion separation, and chiral separation, are highlighted and discussed in detail. Finally, a summary and some perspectives of future developments and challenges in this exciting research field are presented.