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ACS Appl Mater Interfaces. 2016 May 25;8(20):12588-93. doi: 10.1021/acsami.6b03693. Epub 2016 May 11.

Graphene Oxide Nanofiltration Membranes Stabilized by Cationic Porphyrin for High Salt Rejection.

Author information

1
Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , Nanjing 201123, China.

Abstract

Swelling has great influences on the structure stability and separation performance of graphene oxide laminate membranes (GOLMs) for water desalination and purification. Herein, we report cross-linked GOLMs from GO assembled with cationic tetrakis(1-methyl-pyridinium-4-yl)porphyrin (TMPyP) by a vacuum-assisted strategy. The concave nonoxide regions (G regions) of GO are used as cross-linking sites for the first time to precisely control the channel size for water permeation and salt ion retention. Channels around 1 nm are constructed by modulating the assembly ratio of TMPyP/GO, and these cross-linked GOLMs show high salt rejection.

KEYWORDS:

graphene oxide; intercalation; membrane; nanofiltration; salt rejection

PMID:
27158976
DOI:
10.1021/acsami.6b03693

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