期刊
ADVANCED FUNCTIONAL MATERIALS
卷 23, 期 29, 页码 3693-3700出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201202601
关键词
ultrathin graphene membrane; nanofiltration; water purification; nanofluidics
类别
资金
- National Natural Science Foundation of China [51173162, 20974093]
- Qianjiang Talent Foundation of Zhejiang Province [2010R10021]
- Fundamental Research Funds for the Central Universities [2011QNA4029]
- Research Fund for the Doctoral Program of Higher Education of China [20100101110049]
- Zhejiang Provincial Natural Science Foundation of China [R4110175]
A method of fabricating ultrathin (approximate to 22-53 nm thick) graphene nanofiltration membranes (uGNMs) on microporous substrates is presented for efficient water purification using chemically converted graphene (CCG). The prepared uGNMs show well packed layer structure formed by CCG sheets, as characterized by scanning electron microscopy, atomic force microscopy, and transmission electron microscopy. The performance of the uGNMs for water treatment was evaluated on a dead end filtration device and the pure water flux of uGNMs was high (21.8 L m(-2) h(-1) bar(-1)). The uGNMs show high retention (>99%) for organic dyes and moderate retention (approximate to 20-60%) for ion salts. The rejection mechanism of this kind of negatively charged membranes is intensively studied, and the results reveal that physical sieving and electrostatic interaction dominate the rejection process. Because of the ultrathin nature of uGNMs, 34 mg of CCG is sufficient for making a square meter of nanofiltration membrane, indicating that this new generation graphene-based nanofiltration technology would be resource saving and cost-effective. The integration of high performance, low cost, and simple solution-based fabrication process promises uGNMs great potential application in practical water purification.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据