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

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• 作者：Xiao-Ling Xu ; Fu-Wen Lin ; Yong Du ; Xi Zhang ; Jian Wu ; Zhi-Kang Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 25, 2016
• 年：2016
• 卷：8
• 期：20
• 页码：12588-12593
• 全文大小：448K
• 年卷期：0
• ISSN：1944-8252

文摘

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.