Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, 3663 North Zhongshan Road, 200062 Shanghai, China.
Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, 3663 North Zhongshan Road, 200062 Shanghai, China.
J Colloid Interface Sci. 2019 Feb 15;536:252-260. doi: 10.1016/j.jcis.2018.10.063. Epub 2018 Oct 22.
Capacitive deionization (CDI) is a simple, cost-efficient and environmentally-friendly method for brackish water desalination. In order to improve the desalination performance, the inner structures of the porous electrodes should provide more space for ion storage and transportation. Therefore, we utilized an efficient method to synthesize porous graphene electrodes based on the technique of pressurized oxidation and CO activation. The prepared electrodes were characterized electrochemically by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy, and the desalination performance between different samples was compared as well. These results showed that AGE-30 had the highest electrosorption capacity (6.26 mg/g) among all samples, and this was attributed to its high specific surface area (898 m/g), high pore volume (1.223 cm/g), high specific capacitance (56.21F/g), and smaller inner resistance. Thus, the CO activation is confirmed to be a useful method for the enhancement of the graphene electrodes for CDI.
电容去离子（CDI）是一种简单、经济高效且环保的海水淡化方法。为了提高脱盐性能，多孔电极的内部结构应为离子存储和传输提供更多空间。因此，我们利用加压氧化和 CO 激活技术，采用一种高效的方法合成了多孔石墨烯电极。通过循环伏安法、恒电流充放电和电化学阻抗谱对制备的电极进行了电化学表征，并对不同样品之间的脱盐性能进行了比较。结果表明，AGE-30 具有所有样品中最高的电吸附容量（6.26mg/g），这归因于其高比表面积（898m/g）、高孔体积（1.223cm/g）、高比电容（56.21F/g）和较小的内阻。因此，CO 激活被证实是增强 CDI 用石墨烯电极的有效方法。
