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Related Experiment Video

Updated: Nov 4, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Highly stable graphene oxide composite nanofiltration membrane.

Kaiqiang Zheng1, Shiqing Li, Zhou Chen

  • 1Xiamen University Center for Membrane Application and Advancement, College of Materials, Xiamen University, Xiamen 361005, Fujian, China. zhouchen@xmu.edu.cn.

Nanoscale
|May 27, 2021
PubMed
Summary

This study introduces enhanced graphene oxide (GO) membranes using TiO2 and PEI for water treatment. The novel composite membranes offer high water flux and stability for efficient dye removal.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Environmental Engineering

Background:

  • Graphene oxide (GO) membranes show potential for water nanofiltration.
  • Improving water flux and membrane stability in GO membranes remains a challenge.
  • Uniform intercalation for enhanced permeability without water-induced swelling is difficult.

Purpose of the Study:

  • To fabricate GO hybrid lamellar membranes with controlled structures for high-performance nanofiltration.
  • To enhance water flux and stability of GO membranes for water treatment applications.

Main Methods:

  • Fabrication of GO hybrid lamellar membranes using TiO2 intercalants of varying sizes.
  • Enhancement of GO membrane stability through polyethyleneimine (PEI) encapsulation.
  • Testing membrane performance using pure water flux and dye rejection (methylene blue, eosin) under ultra-low pressure.

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Main Results:

  • The optimal composite membrane achieved a pure water flux of 26.0 L m⁻² h⁻¹ bar⁻¹.
  • Achieved 99.9% rejection of methylene blue and eosin.
  • Demonstrated good cycling stability over 5 filtration cycles.

Conclusions:

  • Controllable layer structures in GO hybrid membranes improve nanofiltration performance.
  • TiO2 intercalation and PEI encapsulation enhance both permeability and stability.
  • The developed composite membrane shows potential for industrial applications in ultra-stable GO-based membranes for water treatment.