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Updated: Oct 12, 2025

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination

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Fast Reduced Graphene-Based Membranes with High Desalination Performance.

Shanshan Liang¹, Liuyuan Zhu¹, Shuai Wang¹

¹School of Physics, East China University of Science and Technology, Shanghai 200237, China.

|November 27, 2021

Summary

Researchers developed fast reduced graphene-oxide (FRGO) membranes for superior ion sieving. These membranes offer high water/ion selectivity, advancing desalination technology and understanding nanochannel transport.

Keywords:

graphene oxide ions transportation membrane water/ions selectivity

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Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Graphene-oxide (GO) membranes exhibit promising ion sieving properties for various applications.
Water swelling in GO membranes leads to poor rejection of monovalent metal cations, limiting their performance.

Purpose of the Study:

To develop a rapid and efficient method for fabricating reduced graphene-oxide (rGO) membranes with enhanced ion sieving capabilities.
To investigate the ion selectivity and water permeability of the newly developed fast reduced GO (FRGO) membranes.
To offer new insights into the transport mechanisms within two-dimensional (2D) laminar nanochannels for desalination.

Main Methods:

Fabrication of reduced graphene-oxide (rGO) membranes via a rapid thermal treatment at 160 °C for one minute.
Characterization of the FRGO membranes' structural and performance properties.
Comparative analysis of FRGO membranes against other rGO membranes and existing GO-based membranes.

Main Results:

The fast reduced GO (FRGO) membranes demonstrated high ion sieving ability and ultrahigh water/ion selectivity.
FRGO membranes showed superior performance compared to other rGO membranes with similar interlayer spacings.
The performance of FRGO membranes surpassed most previously reported GO-based membranes for desalination.

Conclusions:

A fast and facile method for fabricating high-performance FRGO membranes was successfully developed.
FRGO membranes offer significant potential for energy- and environment-related applications, particularly in high-performance desalination.
The study provides novel insights into ion transport mechanisms within 2D laminar nanochannels.