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Issue 7, 2019
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A surface-modified EDTA-reduced graphene oxide membrane for nanofiltration and anti-biofouling prepared by plasma post-treatment

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Abstract

Surface-modified EDTA-reduced graphene oxide (EDTA-rGO) membranes with high rejection rates, for monovalent ions, in particular, were fabricated from graphene oxide (GO) for nanofiltration. The EDTA-rGO membrane surface was treated with oxygen plasma to enhance its water permeability (P-EDTA-rGO). The resulting P-EDTA-rGO membrane demonstrated rejection rates of more than 80% for NaCl and water permeabilities of approximately 150 LMH bar−1, which are approximately 15 times higher than those before the treatment, without sacrificing the ion rejection performance for small ions. The high rejection rates and permeabilities of the P-EDTA-rGO membrane are presumed to originate from the small interlayer spacing (remains comparably small even in a wetted state; 5.7 Å) resulting from EDTA functionalization and the enhanced hydrophilicity due to plasma treatment. In addition, the membrane impeded bacterial adhesion.

Graphical abstract: A surface-modified EDTA-reduced graphene oxide membrane for nanofiltration and anti-biofouling prepared by plasma post-treatment

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Supplementary files

Article information


Submitted
11 Dec 2018
Accepted
31 May 2019
First published
12 Jun 2019

Environ. Sci.: Nano, 2019,6, 2292-2298
Article type
Paper

A surface-modified EDTA-reduced graphene oxide membrane for nanofiltration and anti-biofouling prepared by plasma post-treatment

B. Lee, D. W. Suh, S. P. Hong and J. Yoon, Environ. Sci.: Nano, 2019, 6, 2292
DOI: 10.1039/C8EN01400K

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