Electrochemically switched ion exchange performances of capillary deposited nickel hexacyanoferrate thin films  

作　　者：郝晓刚 郭金霞 刘世斌 孙彦平 

机构地区：[1]Department of Chemical Engineering, Taiyuan U niversity of Technology, Taiyuan 030024, China

出　　处：《中国有色金属学会会刊：英文版》2006年第3期556-561,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(20006011) supported by the National Natural Science Foundation of China; Project(20021017) supported by the Natural Science Foundation of Shanxi Province; Project(2004-24) supported by the Scholar Council Foundation of Shanxi Province, China

摘　　要：Thin films of capillary deposited nickel hexacyanoferrate(NiHCF) were investigated as electrochemically switched ion exchange(ESIX) materials. The films were generated on platinum and graphite substrates based on the ternary reagent diagram. In 1 mol/L KNO3 solution, cyclic voltammetry(CV) combined with energy-dispersive X-ray spectroscopy(EDS) was used to determine the influence of experimental conditions on the electroactivity of the NiHCF thin film on Pt substrates. The ion selectivity, ion-exchange capacity and the regenerability of NiHCF films on Pt and graphite substrates were investigated. The experiment results show that the NiHCF thin films from Ni2+-poor growth conditions have double peaks CV curves and contain relatively larger amount of potassium; while those from Ni2+-rich growth conditions are single peak CV curves and contain relatively smaller amount of potassium. It is demonstrated that the NiHCF thin films of capillary chemical deposition have good ESIX performances.Thin films of capillary deposited nickel hexacyanoferrate（NiHCF） were investigated as electrochemically switched ion exchange（ESIX） materials. The films were generated on platinum and graphite substrates based on the ternary reagent diagram. In 1 mol/L KNO3 solution, cyclic voltammetry（CV） combined with energy-dispersive X-ray spectroscopy（EDS） was used to determine the influence of experimental conditions on the electroactivity of the NiHCF thin film on Pt substrates. The ion selectivity, ion-exchange capacity and the regenerability of NiHCF films on Pt and graphite substrates were investigated. The experiment results show that the NiHCF thin films from Ni^2＋-poor growth conditions have double peaks CV curves and contain relatively larger amount of potassium; while those from Ni^2＋-rich growth conditions are single peak CV curves and contain relatively smaller amount of potassium. It is demonstrated that the NiHCF thin films of capillary chemical deposition have good ESIX performances.

关 键 词：离子交换 薄膜 毛细管化学沉积 表面化学 

分 类 号：TB383.2[一般工业技术—材料科学与工程]