【作者】 李永国； 丘丹圭； 侯建荣； 俞杰； 张计荣； 张渊； 郝晓刚；

【Author】 Li Yong-Guo;Qiu Dan-Gui;Hou Jian-rong;Yu jie;Zhang Ji-rong;Zhang yuan;Hao Xiao-Gang;China Institute for Radiation Protection;Department of Chemical Engineering,Taiyuan University of Technology;

【机构】 中国辐射防护研究院； 太原理工大学化工学院；

【摘要】 电沉积方法在铂片上制得具有电活性CuHCF（Copper Hexacyanoferrate）薄膜,通过循环伏安法在0.1 mol·L（-1）Mg（NO₂）₂、Ca（NO₃）₂、Sr（NO₃）₂中考察了薄膜电极的电控离子分离性能。在0.1 mol·L^-1[Mg（NO₃）₂+Sr（NO₃）₂]混合溶液中结合电化学石英晶体微天平（EQCM）原位检测了不同浓度下膜电极氧化还原过程中的伏安特性曲线和频率响应,分析了膜对Sr²⁺的选择性。通过XPS测定了氧化还原状态下CuHCF薄膜组成与元素价态。结果表明,CuHCF薄膜在二价金属溶液中具有可逆的离子交换行为,对Sr²⁺离子的选择性大于Mg²⁺离子,通过电控离子分离方法可以实现碱土金属离子的有效分离。更多还原

【Abstract】 CuHCF films were synthesized on platinum/quartz crystal electrode by electrochemistry deposition and the film-electrode systems were investigated as electrochemically controlled ion separation（ECIS） materials for the selective separation of Sr²⁺ in solutions.In 0.1 mol · L^-1 Mg（NO₃）₂,Ca（NO₃）₂ and Sr（NO₃）₂ solutions,cyclic voltammetry（CV） was used to reversibly intercalate and deintercalate cations from the matrix and to investigate the eleotroactivity,electrochemical behavior and the loading mechanism of CuHCF film electrodes.CV and electrochemical quartz crystal microbalance（EQCM） were used to investigate the ion selectivity of the CuHCF films in 0.1 mol·L^-1[Mg（NO₃）₂+Sr（NO₃）₂]mixture solution.The chemical composition and elemental valence of NiHCF films in reduced and oxidized form were also characterized by X-ray photoelectron spectroscopy（XPS）.Experimental results show that MHCF films have reversible electrochemical behavior in alkaline earth metal solution and display a high Sr²⁺ selectivity in Mg²⁺ /Sr²⁺ mixtures.The alkaline earth metal ions can lie separated effectively by ECIS processes.更多还原