文献类型：期刊文献

英文题名：Chemical modification of carbon particles to enhance the electrosorption of capacitive deionization process

作者：Dou, Chen[1];Zhai, Shengyong[2];Liu, Yiyang[1];Chen, Peng[1];Yin, Di[1];Huang, Guangtuan[1];Zhang, Lehua[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Changchun Univ Chinese Med, Jilin Ginseng Acad, Jilin 130117, Peoples R China

年份：2020

卷号：10

期号：1

起止页码：57

外文期刊名：JOURNAL OF WATER REUSE AND DESALINATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000525834600005)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (21876050, 51273196), the National Key Research and Development Plans of Special Project for Site Soils (2018YFC1800600) and the Special Fund from State Key Joint Laboratory of Environment Simulation and Pollution Control (18K10ESPCT).

语种：英文

外文关键词：activated carbon particle; capacitive deionization; chemical modification; electrosorption

摘要：Activated carbon particle electrodes modified by oxygen or nitrogen groups could be promising electrode candidates for capacitive deionization (CDI) processes. In this work, activated carbon particle electrodes were modified by phosphoric acid, nitric acid, urea, melamine, and zinc chloride to enhance desalination of an aqueous electrolytic solution. The modified activated carbon particles were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller measurements and electrochemical scanning. The electrodes with oxygen or nitrogen groups on the surface exhibited a much higher desalination capacity and charge efficiency than those without any surface modification. Particularly, the activated carbon particle electrode modified by phosphoric acid exhibited a desalination capacity of 15.52 mg/g at 1.4 V in 500 mg/L NaCl solution, which was approximately eight times that of the unmodified electrode (2.46 mg/g). The enhancement was attributed to a higher specific capacitance, a lower electrochemical impedance and an increase in oxygen or nitrogen-containing groups on the surface.