Ion-selective electrodes with three-dimensionally ordered macroporous carbon as the solid contact
Ion-selective electrodes with three-dimensionally ordered macroporous carbon as the solid contact
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DOI：
10.1021/ac070132b
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发表时间：
2007-06-15
影响因子：
7.4
通讯作者：
Buehlmann, Philippe
中科院分区：
文献类型：
--
作者：
Lai, Chun-Ze;Fierke, Melissa A.;Buehlmann, Philippe
以三维有序大孔（3DOM）碳作为离子载体掺杂溶剂聚合物膜和金属接触之间的中间层的电极是固体接触离子选择性电极（SC-ISE）的一种新方法。由于3DOM碳的良好互连的孔和壁结构，用电解质溶液填充3DOM孔导致表现出高离子和导电性的纳米结构材料。新鲜制备的具有3DOM碳接触的SC-ISE的长期漂移仅为11.7 μ V/h，并且在与溶液接触1个月时不会增加，这使得其成为迄今为止报道的最稳定的SC-ISE。该电极具有良好的抗氧干扰性能。此外，与先前报道的以导电聚合物作为中间层的SC-ISE相比，3DOM碳是电子导体而不是半导体，消除了任何光干扰。
Electrodes with three-dimensionally ordered macroporous (3DOM) carbon as the intermediate layer between an ionophore-doped solvent polymeric membrane and a metal contact are presented as a novel approach to solid-contact ion-selective electrodes (SC-ISEs). Due to the well-interconnected pore and wall structure of 3DOM carbon, filling of the 3DOM pores with an electrolyte solution results in a nanostructured material that exhibits high ionic and electric conductivity. The long-term drift of freshly prepared SC-ISEs with 3DOM carbon contacts is only 11.7 mu V/h, and does not increase when in contact with solution for 1 month, making this the most stable SC-ISE reported so far. The electrodes show good resistance to the interference from oxygen. Moreover, in contrast to previously reported SC-ISEs with conducting polymers as the intermediate layer, 3DOM carbon is an electron conductor rather than a semiconductor, eliminating any light interference.