Highly stable graphene-oxide-based membranes with superior permeability

Khalid Hussain Thebo, Xitang Qian, Qing Zhang, Long Chen, Hui-Ming Cheng and Wencai Ren ()
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Khalid Hussain Thebo: Chinese Academy of Sciences
Xitang Qian: Chinese Academy of Sciences
Qing Zhang: Chinese Academy of Sciences
Long Chen: Chinese Academy of Sciences
Hui-Ming Cheng: Chinese Academy of Sciences
Wencai Ren: Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Increasing fresh water demand for drinking and agriculture is one of the grand challenges of our age. Graphene oxide (GO) membranes have shown a great potential for desalination and water purification. However, it is challenging to further improve the water permeability without sacrificing the separation efficiency, and the GO membranes are easily delaminated in aqueous solutions within few hours. Here, we report a class of reduced GO membranes with enlarged interlayer distance fabricated by using theanine amino acid and tannic acid as reducing agent and cross-linker. Such membranes show water permeance over 10,000 L m−2 h−1 bar−1, which is 10–1000 times higher than those of previously reported GO-based membranes and commercial membranes, and good separation efficiency, e.g., rhodamine B and methylene blue rejection of ~100%. Moreover, they show no damage or delamination in water, acid, and basic solutions even after months.

Date: 2018
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DOI: 10.1038/s41467-018-03919-0

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