CAJ | 학술논문

采用毛细化学沉积法在炭纸/石墨颗粒复合导电基体的微孔通道内合成铁氰化镍(Nickel hexacyanoferrate,NiHCF)薄膜,并考察了膜电极在碱金属溶液中的电控离子交换性能.通过扫描电子显微镜、能量色散谱、X射线光电子能谱、红外分子吸收光谱等分析了复合薄膜电极的表面形貌及组成;利用离子色谱检测了再生液中碱金属离子浓度变化;应用循环伏安法在1 mol · L~(-1) KNO_3/C_sNO_3溶液中考察了膜电极的离子交换容量、循环寿命与再生能力.结果表明:炭纸/石墨复合基体具有三维多孔结构特征,复合基体NiHCF膜电极具有大的离子交换容量、低的扩散阻力、良好的循环稳定性与再生能力,可用于碱金属离子的选择性分离.
채용모세화학침적법재탄지/석묵과립복합도전기체적미공통도내합성철청화얼(Nickel hexacyanoferrate,NiHCF)박막,병고찰료막전겁재감금속용액중적전공리자교환성능.통과소묘전자현미경、능량색산보、X사선광전자능보、홍외분자흡수광보등분석료복합박막전겁적표면형모급조성;이용리자색보검측료재생액중감금속리자농도변화;응용순배복안법재1 mol · L~(-1) KNO_3/C_sNO_3용액중고찰료막전겁적리자교환용량、순배수명여재생능력.결과표명:탄지/석묵복합기체구유삼유다공결구특정,복합기체NiHCF막전겁구유대적리자교환용량、저적확산조력、량호적순배은정성여재생능력,가용우감금속리자적선택성분리.
Nickel hexacyanoferrate (NiHCF) thin films were loaded within the porous channels of a carbon paper/graphite electrode by capillary chemical deposition. The composite film electrode was investigated for electrochemically controlled ion separation in an alkaline cation solution. The morphology and composition of the composite film electrode were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, infrared spectroscopy and X-ray photoelectron spectroscopy. Cyclic voltammetry was used to investigate the separation capacity, cycle life and regeneration ability of NiHCF film electrodes in 1 mol · L~(-1) KNO_3 and CsNO_3 solution. Results show that the composite film electrodes had a high ion exchange capacity, low diffusion resistance, good cycling stability and regeneration ability. It is suggested that the composite film electrodes are suitable for the selective separation of alkaline cations.