多排石墨芯基体NiHCF膜电极的制备与电控离子分离性能  

Preparation and Characterization of Multi-row Graphite Cores NiHCF Film Electrodes for Electrochemically Controlled Ion Separation

作　　者：李永国[1,2] 郝晓刚[1] 马旭莉[1] 张玫[1] 刘世斌[1] 丘丹圭[2] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]中国辐射防护研究院,山西太原030006

出　　处：《太原理工大学学报》2009年第4期429-433,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(20676089);山西省自然科学基金资助项目(2007011029);山西省回国留学人员基金资助项目(2008-32)

摘　　要：以多排石墨芯(MRGC)为基体材料,采用阴极沉积法制备了具有电化学控制离子分离(ECIS)性能的电活性NiHCF膜电极。采用SEM和XPS分析考察了NiHCF薄膜的形貌与组成;在1 mol/L的NaNO3溶液中通过循环伏安法可逆地置入与释放Na+,考察NiHCF膜电极的离子交换容量、再生性能;在1 mol/L(NaNO3+CsNO3)混合溶液中比较不同混合浓度下膜电极的伏安特性曲线,分析了膜电极对Cs+/Na+的选择性。同时采用离子色谱测定了氧化态NiHCF膜电极在初始[Cs+]为10 mg/L模拟液中进行ECIS过程的Cs+浓度变化。实验结果表明,MRGC基体NiHCF膜电极离子交换容量大、再生能力好,对Cs+有较强的选择性,可用于Cs+的电控离子分离过程。The electroactive nickel hexacyanoferrate （NiHCF） thin films for electrochemically controlled ion separation （ECIS） were prepared by cathodic deposition on multi-row graphite cores （MRGC）. The composition and morphology of the MRGC NiHCF films were investigated using XPS and SEM. In 1 mg/L NaNO3 solution, potential cycling was used to reversibly intercalate and deintercalate Na＋ from the matrix and to study the ion-exchange capacity and regenerability of the film electrodes. In 1 mg/L（NaNO3 ＋CsNO3） mixture solutions, cyclic voltammetry （CV） was used to compare the ion selectivity of the films. The Cs＋ concentration in ECIS was analyzed by ion chromatography （IC） in initial cesium concentration of 10 mg/L. Experimental results show that the MRGC NiHCF thin films have higher separation capacity, good regenerability and Cs＋ selectivity. They are suitable for electrochemically controlled Cs＋ separation.

关 键 词：多排石墨芯 NiHCF膜电极 电控离子分离 制备 性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]