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Related Experiment Video

Updated: Jun 27, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Ionic Sieving at Sub-Angstrom Precision Enabled by Metal Organic Frameworks.

Fengmi Zeng1,2, Yihui Yang1,2, Xianhui Li2

  • 1Research Centre of Ecology and Environment for Coastal Area and Deep Sea, Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.

ACS Applied Materials & Interfaces
|August 21, 2023
PubMed
Summary
This summary is machine-generated.

Metal-organic framework (MOF) membranes efficiently separate cesium ions. Functionalized MIL-53 membranes exhibit high Cs+ selectivity and rapid transport, crucial for advanced separations in high-tech industries.

Keywords:
MIL-53angstrom porescesium ionsion selectivitymetal−organic frameworks

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Growing demand for cesium in high-tech industries necessitates efficient extraction technologies.
  • Current methods for cesium extraction face limitations in efficiency and selectivity.
  • Metal-organic frameworks (MOFs) show promise for advanced separation applications.

Purpose of the Study:

  • To develop highly selective membranes for cesium ion extraction.
  • To investigate the transport properties of functionalized MOF membranes for cesium ions.
  • To explore the potential of MOFs in addressing the increasing demand for cesium.

Main Methods:

  • Fabrication of MIL-53 membranes functionalized with -Cl and -NH2 groups.
  • Utilizing angstrom-scale pore windows for ion sieving.
  • Measuring cesium ion transport and selectivity against other ions, particularly Li+.

Main Results:

  • MIL-53-NH2 membranes demonstrated highly selective transport of cesium ions (Cs+).
  • Angstrom-scale pores enabled high throughput, with Cs+ ions moving significantly faster than larger ions.
  • Achieved an exceptional Cs+/Li+ selectivity of approximately 315 due to precise size sieving.

Conclusions:

  • Functionalized MIL-53 MOF membranes offer a promising solution for efficient cesium separation.
  • The precise angstrom-scale pores are key to achieving high ion selectivity and rapid transport.
  • This research highlights the potential of MOFs for advanced separations and drives further material development.