Highly stable nickel hexacyanoferrate nanotubes for electrically switched ion exchange
Highly stable nickel hexacyanoferrate nanotubes for electrically switched ion exchange
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用于电开关离子交换的高度稳定的六氰基铁酸镍纳米管
DOI：
10.1002/adfm.200700015
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发表时间：
2007-10-15
影响因子：
19
通讯作者：
Xia, Xing-Hua
中科院分区：
文献类型：
--
作者：
Chen, Wei;Xia, Xing-Hua
基于多孔阳极氧化铝独特的表面性质，采用电动力学方法制备了铁氰化镍（NiHCF）纳米管。通过这种方法，可以快速形成纳米管，其形貌忠实地复制了模板中的纳米孔。用SEM和TEM对所制备的纳米管进行了表征。IR、UV、EDX和电化学测试结果表明，NiHCF纳米管以K2Ni[Fe（CN）（6）]的形式存在。由于这种单一的组成和独特的纳米结构，NiHCF纳米管显示出优异的稳定的铯选择性离子交换能力。经NiHCF纳米管修饰的电极在500次循环后容量保持其初始值的95.3%。即使在1500和3000次循环后，NiHCF纳米管仍然分别保留92.2%和82.9%的离子交换容量。
Nickel hexacyanoferrate (NiHCF) nanotubes are fabricated by an electrokinetic method based on the distinct surface properties of porous anodic alumina. By this method, nanotubes can be formed rapidly with the morphologies faithfully replicating the nanopores in the template. The prepared nanotubes were carefully characterized using SEM and TEM. Results from IR, UV, EDX, and electrochemical measurements show that the NiHCF nanotubes exist only in the form of K2Ni[Fe(CN)(6)]. Because of this single composition and unique nanostructure, NiHCF nanotubes show excellently stable cesium-selective ion-exchange ability. The capacity for electrodes modified with NiHCF nanotubes after 500 potential cycles retains 95.3 % of its initial value. Even after 1500 and 3000 cycles, the NiHCF nanotubes still retain 92.2 % and 82.9 %, respectively, of their ion-exchange capacity.