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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.
Electro-active nickel ferrocyanide films were prepared on Pt-plated quartz wafers and platinum substrates respectively by electrodeposition method. The ion-exchange performance of the membrane electrode in the solution containing yttrium ions was investigated. Nitric acid yttrium solution, the use of cyclic voltammetry and quartz crystal microbalance test technology investigated the nickel yttrium ferricyanide yttrium ion implantation release properties and the corresponding quality changes at the same time compare the nickel ferricyanide membrane electrode in Y ( (NO3) 3 and Sr (NO3) 2 solution was investigated by cyclic voltammetry in a mixed solution of 0.1 mol·L-1 [Y (NO3) / Sr2 + ion.The surface morphology of the nickel ferricyanide film was observed by scanning electron microscopy and the elemental composition of the film in the oxidized and the reduced state was measured by X-ray photoelectron spectroscopy.The results show that ferricyanide The Ni film has good ion exchange behavior in Y3 + -containing solution, in which the film quality of the oxidation process decreases, corresponding to the release of yttrium ions; the film quality of the reduction process increases, corresponding to the insertion of yttrium ions; The redox state of yttrium ions to achieve effective separation.