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Updated: Feb 14, 2026

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0D-on-2D MOF-Based Membranes for Enhanced Helium Separation.

Qi Liu1, Yuanyuan Liu1, Jinpeng Hou1

  • 1The State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China.

ACS Applied Materials & Interfaces
|February 13, 2026
PubMed
Summary
This summary is machine-generated.

A novel composite membrane using ZIF-67 and Ni3(HITP)2 metal-organic frameworks (MOFs) significantly enhances helium separation from methane. This scalable and flexible membrane achieves high selectivity, paving the way for efficient helium purification.

Keywords:
0D nanocrystal2D nanosheetMOF membranegas separationhelium recovery

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Metal-organic framework (MOF) membranes show potential for helium (He) separation.
  • Current MOF membranes face limitations in selectivity due to imprecise pore size control.
  • Efficient helium purification is crucial for various industrial applications.

Purpose of the Study:

  • To design a highly selective MOF-based composite membrane for improved helium separation.
  • To overcome the limitations of single-component MOFs in achieving precise molecular sieving.
  • To demonstrate the scalability and flexibility of the developed membrane technology.

Main Methods:

  • Fabrication of a 0D-on-2D MOF composite membrane by assembling 0D ZIF-67 and 2D Ni3(HITP)2.
  • Incorporation of polyvinylpyrrolidone (PVP) to enhance membrane integrity and adhesion.
  • Characterization of the composite membrane's structure, performance, and stability.

Main Results:

  • The Ni3(HITP)2@ZIF-67 composite membrane achieved a He/CH4 selectivity of 63.2, an eight-fold improvement over single-component MOFs.
  • A three-stage membrane process demonstrated helium enrichment from 1% to 99.9%.
  • The membrane exhibits scalability up to 15 cm diameter and stability under 180° bending.

Conclusions:

  • The 0D-on-2D MOF composite membrane design offers precise molecular sieving and efficient transport pathways.
  • The developed membrane demonstrates competitive performance among existing MOF membranes for gas separation.
  • This work provides a promising strategy for engineering highly selective and practical MOF-based separation membranes.