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3D Channel-structured graphene as efficient electrodes for capacitive deionization
Journal of Colloid and Interface Science ( IF 9.9 ) Pub Date : 2018-11-28 , DOI: 10.1016/j.jcis.2018.11.105
Liang Chang , Yun Hang Hu

Capacitive deionization (CDI), which is one of up-and-coming water treatment technologies, is based on ion electrostatic adsorption on electrode surface. Herein, three-dimensional channel-structured graphene (CSG), which was synthesized via exothermic reaction between liquid potassium and carbon monoxide gas, was demonstrated as an efficient electrode material for CDI. Namely, the CSG electrode exhibited a specific capacity of 207.4 F/g at 0.2 A/g in 1 M NaCl aqueous solution. In a batch-mode recycling system, the electrosorption capacity of CSG can achieve 5.70 and 9.60 mg/g at 1.5 V in 50 and 295 mg/l NaCl aqueous solutions, respectively. The excellent electrosorption capacity of CSG, especially under low saline concentration, can be attributed to the synergistic effect of its large surface area (711.9 m2/g), unique channel structure, and oxygen functional groups.



中文翻译:

3D通道结构的石墨烯可作为高效电容去离子电极

电容去离子(CDI)是一种新兴的水处理技术,它基于电极表面的离子静电吸附。在本文中,通过液态钾和一氧化碳气体之间的放热反应合成的三维通道结构石墨烯(CSG)被证明是一种有效的CDI电极材料。即,CSG电极在1M NaCl水溶液中在0.2A / g下显示出207.4F / g的比容量。在批处理模式的循环系统中,CSG在50 V和295 mg / l的NaCl水溶液中在1.5 V时的电吸附容量分别可以达到5.70和9.60 mg / g。CSG出色的电吸附能力,尤其是在低盐浓度下,可归因于其大表面积(711.9 m 2)的协同作用。/ g),独特的通道结构和氧官能团。

更新日期:2018-11-28
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