电容去离子
海水淡化
碳纳米管
材料科学
色散(光学)
活性炭
电极
化学工程
表面改性
电化学
纳米技术
膜
吸附
化学
有机化学
物理化学
工程类
物理
光学
生物化学
作者
Bin Lee,Park Namsoo,Kyung Suk Kang,Ho Jin Ryu,Soon Hyung Hong
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2017-12-21
卷期号:6 (2): 1572-1579
被引量:73
标识
DOI:10.1021/acssuschemeng.7b01750
摘要
Energy-effective, ecofriendly desalination is a technology in universal demand due to global water scarcity. Capacitive deionization (CDI) is a promising method that has those advantages, but it is still necessary to enhance desalination performance to desalinate high-concentration raw salt water. In this work, carbon nanotubes (CNTs) are used as a conductive agent of the CDI electrode. To use CNTs as a conductive agent, we examine the effect of the dispersion status of the CNTs within activated carbon active material on the CDI performance. Acid treatment-functionalization of CNTs created a better dispersion status than CNTs without any treatment. Homogeneously dispersed CNTs showed enhanced electrochemical and desalination performance. Interestingly, desalination tests with highly concentrated raw salt water achieved a more notable improvement with 13.9% at only 1 wt % of CNT dispersion. The improvement mechanisms with dispersing CNTs such as increment of surface area and decrement of electrode resistivity are analyzed.
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