Carbon Electrode Modified by Nano-MgO to Improve Performance of Capacitive Deionization

摘要：

　　Activated carbon (AC) electrode modified by nano-MgO (MgO-AC) was fabricated by sol-gel method in order to improve the electro-absorption capacity of AC electrode.The surface and electrochemical properties of MgO-AC electrode were characterized by SEM analysis,BET test and cyclic voltammetry analysis respectively.The results show that rod-like nanometer MgO is loaded on the surface of AC electrode.The specific surface area of the MgO-AC electrode achieves the maxium of 1120 m2/g increasing 335 m2/g compared to that of AC electrode.The specific capacitance of carbon electrode modified by the mass concentration of 10% of MgO achieves the maxium of 89.8 Fg-1 increasing 20 Fg-1 compared to that of AC electrode.The adsorption experiments show that the salt removal efficiency of KC1 solution achieves the maxium of 70.1% increasing 40.1% compared to that of AC electrode under the conditions of the voltage of 1.5 V,plate area of 5 cmx5 cm,electrode spacing of 1 cm,flow rate of 20 ml/min and raw water conductance of 320 us/min.The rate of desalination could be maintained after several cycles,indicating that the MgO-AC electrode shows a good repeatability.This study gives a guide for AC electrode applied to capacitive deionization technology.

关键词： Carbon electrode nanometer zinc oxide capacitive deionization modification

作者: Zhang Yingjie Wang Chunxia Li Ting Guo Jia

作者单位: School of Chemical Engineering, Northeast Dianli University, P.O. Box 81, Jilin 132012, P.R. China

会议类型: 国际会议

会议名称: 2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)

会议地点: 青岛

会议语种:英文

页码: 256-260

在线出版日期: 2013-06-25（万方平台首次上网日期，不代表论文的发表时间）