电活性铁氰化镍膜电极对稀土钇的电控离子分离

doi:10.61558/2993-074X.2140

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (5): 482-487. doi: 10.61558/2993-074X.2140

• 环境电化学近期研究专辑（吉林大学林海波教授主编） • 上一篇下一篇

电活性铁氰化镍膜电极对稀土钇的电控离子分离

张浩，郝晓刚^*，王忠德，张忠林，马旭莉，李一兵，刘世斌

太原理工大学化学化工学院，山西太原 030024

收稿日期:2012-12-25 修回日期:2013-03-08 出版日期:2013-10-28 发布日期:2013-03-08
通讯作者: 郝晓刚 E-mail:xghao@tyut.edu.cn
基金资助:
国家自然科学基金项目(No. 21276173)、山西省自然科学基金项目(No. 2012011020-5，No. 2012011006-1)及山西省国际科技合作计划项目(No. 2011081028)资助

Electrochemically Switched Separation of Yttrium Ion Using Electroactive Nickel Hexacyanoferrate Thin Films in Rare Earth Metal Solution

ZHANG Hao, HAO Xiao-gang^*, WANG Zhong-de, ZHANG Zhong-lin, MA Xu-li，LI Yi-bing, LIU Shi-bin

Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2012-12-25 Revised:2013-03-08 Published:2013-10-28 Online:2013-03-08
Contact: HAO Xiao-gang E-mail:xghao@tyut.edu.cn

摘要/Abstract

摘要： 通过电沉积方法分别在镀铂石英晶片和铂基底上制备了电活性铁氰化镍膜，并考察了膜电极在含钇离子溶液中的电控离子交换性能. 在0.1 mol·L^-1的硝酸钇溶液中，使用循环伏安法及石英晶体微天平技术测试考察了铁氰化镍膜对钇离子的置入释放性能及对应的质量变化，同时比较了铁氰化镍膜电极在Y(NO₃)₃和Sr(NO₃)₂溶液中的电化学性能. 在0.1 mol·L^-1 [Y(NO₃)₃ + Sr(NO₃)₂]混合溶液中，通过循环伏安法分析了薄膜对Y³⁺/Sr²⁺离子的选择性. 用扫描电子显微镜观察了铁氰化镍膜的表面形貌，并通过X射线光电子能谱仪测定了膜在氧化和还原状态下的元素组成. 结果表明，铁氰化镍膜在含Y³⁺溶液中具有良好的离子交换行为，其中氧化过程薄膜质量减少，对应着钇离子的释放；还原过程薄膜质量增加，对应钇离子的置入；在0.0 V或0.9 V调控膜电极的氧化还原状态实现对钇离子的有效分离.

关键词: 铁氰化镍薄膜, 电控离子交换, 钇分离, 稀土金属

Abstract: Electroactive nickel hexacyanoferrate (NiHCF) thin films were synthesized by cathodic deposition and investigated as electrochemically switched ion exchange (ESIX) materials for the separation of Y³⁺ from aqueous solutions. In 0.1 mol·L^-1 Y(NO₃)₃ solution, cyclic voltammetry (CV) combined with electrochemical quartz crystal microbalance (EQCM) technique was used to investigate the electroactivity, reversibility of the film electrodes and the mechanism of ion exchange. The electrochemical behavior of NiHCF film electrodes was also compared with that in Sr(NO₃)₂ solutions. The ion selectivity of the film was investigated in 0.1 mol·L^-1 solutions containing [Y(NO₃)₃+ Sr(NO₃)₂]. The elementary composition of NiHCF films in reduced and oxidized forms were also characterized by X-ray photoelectron spectroscopy (XPS). Experimental results show that the electroactive NiHCF films have reversible electrochemical behavior in aqueous solutions containing Y³⁺ and Sr²⁺, respectively. The NiHCF film electrodes displayed a high Y³⁺ selectivity in Y³⁺/Sr²⁺ binary mixtures and the Y³⁺ ions could be separated effectively from aqueous solutions by ESIX processes.

Key words: nickel hexacyanoferrate films, electrochemically switched ion exchange, separation of yttrium ion, rare earth

中图分类号:

TB34
X703.1

张浩, 郝晓刚, 王忠德, 张忠林, 马旭莉, 李一兵, 刘世斌. 电活性铁氰化镍膜电极对稀土钇的电控离子分离[J]. 电化学（中英文）, 2013, 19(5): 482-487.

ZHANG Hao, HAO Xiao-gang, WANG Zhong-de, ZHANG Zhong-lin, MA Xu-li, LI Yi-bing, LIU Shi-bin. Electrochemically Switched Separation of Yttrium Ion Using Electroactive Nickel Hexacyanoferrate Thin Films in Rare Earth Metal Solution[J]. Journal of Electrochemistry, 2013, 19(5): 482-487.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I5/482

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电活性铁氰化镍膜电极对稀土钇的电控离子分离

Electrochemically Switched Separation of Yttrium Ion Using Electroactive Nickel Hexacyanoferrate Thin Films in Rare Earth Metal Solution

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