Preparation and characterization of high capacity and stability porous graphite composite electrodes for electrochemically controlled ion separation
In this paper, porous electrodes of graphite substrate were made and nickel hexacyanoferrate (NiHCF) thin films were synthesized within the electrodes by capillary chemical deposition. In 1 mol?L -1 KNO3 solution, the cyclic voltammetry (CV) was used to investigate the electroactivity and separation capacity of different NiHCF film electrodes. The optimum preparation conditions for high separation ability NiHCF film electrode are obtained: nickel net is framework, the diameter of graphite particle is 0.1 mm, 4 mL ethanol and 0.05 g PTFE are needed in a gram graphite, the concentration of K3Fe(CN)6 and NiSO4 is 0.1mol?L -1. The composition and morphology of the film were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The cycle life and regenerability of the film electrode were also investigated. Experimental results show that the porous electrodes have a higher surface area and the preparation process is simple; NiHCF thin film electrodes with porous graphite substrate have higher separation capacity, good stability and regenerability. The film-electrode systems are suitable for electrochemically controlled ion separation (ECIS) process.
porous electrodes graphite substrate electrochemically controlled ion separation capillary chemical deposition
Yongguo Li Xiaogang Hao Yanyan Yang Zhonglin Zhang Shibin Liu
Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）