Water transport through graphene oxide membranes: the roles of driving forces

被引：81

作者：

Chong, J. Y. ^{[1
]}

Wang, B. ^{[1
]}

Li, K. ^{[1
]}

机构：

[1] Imperial Coll London, Dept Chem Engn, Barrer Ctr, London SW7 2AZ, England

来源：

CHEMICAL COMMUNICATIONS | 2018年 / 54卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

COMPOSITE MEMBRANES; NANOFILTRATION; DEHYDRATION; DIFFUSION; MICROSTRUCTURE; PERMEATION; SEPARATION; PAPER;

D O I：

10.1039/c7cc09120f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene oxide (GO) membranes have shown excellent selectivities in nanofiltration and pervaporation. However, the water transport mechanisms in the unique membrane laminar structure are still not well understood, especially in pervaporation which involves selective permeation and evaporation. Herein, water transport in GO membranes was tested under two different modes: pressure-driven permeation and pervaporation. The pure water flux was found to be 1-2 orders of magnitude higher in pervaporation due to the large capillary pressure induced by evaporation. The water flux in pervaporation was suggested to be limited by evaporation at room temperature but surface diffusion at high temperature.

引用

页码：2554 / 2557

页数：4

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