铁氰化铜薄膜电极对溶液中Sr^(2+)电控离子分离性能  

Separating properties of CuHCF thin film electrode for electrochemically controlled ion Sr^(2+) from solution

作　　者：李永国[1] 侯建荣[1] 俞杰[1] 梅军 张渊[1] 王坤俊[1] 鞠健[3] 

机构地区：[1]中国辐射防护研究院,太原030006 [2]秦山核电有限公司,海盐314300 [3]太原理工大学化工学院,太原030024

出　　处：《化工新型材料》2014年第1期96-99,共4页New Chemical Materials

基　　金：国家自然科学基金(20676089)

摘　　要：电沉积方法在铂片上制得具有电活性CuHCF(Copper Hexacyanoferrate)薄膜,通过循环伏安法考察了薄膜电极的电控离子分离性能。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Sr2+离子的有效分离。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. Cyclic voltammetry （CV） was used to reversibly intercalate and deintercalate cations from the matrix and to investigate the electroactivity, electrochemical behavior and the loading mechanism of the elec- trodes. CV and electrochemical quartz crystal microhalance （EQCM） were used to investigate the ionic selectivity of the Cu- HCF films. 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 showed that MHCF films had reversible electrochemical behavior in alkaline earth metal solution and displaied a high Sr2＋ selectivity in Mg2＋/St2＋ mixtures. The Sr2＋ ions can be separated effectively by ECIS processes.

关 键 词：CuHCF薄膜 电控离子分离 碱土金属 电沉积 

分 类 号：O646.5[理学—物理化学]