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首页> 外文期刊>Chemistry: A European journal >Carbon-Nanotube-Alginate Composite Modified Electrode Fabricated by In Situ Gelation for Capillary Electrophoresis
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Carbon-Nanotube-Alginate Composite Modified Electrode Fabricated by In Situ Gelation for Capillary Electrophoresis

机译：原位凝胶法制备碳纳米管藻酸盐复合修饰电极

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摘要

This report describes the development and the application of a novel carbon-nanotube (CNT)-alginate composite modified electrode as a sensitive amperometric detector for capillary electrophoresis (CE). The composite electrode was fabricated on the basis of in situ gelation of a mixture of CNTs and sodium alginate on the surface of a carbon disc electrode in aqueous calcium chloride solution. SEM, energy-dispersive spectroscopy, XRD, and FTIR spectroscopy offered insights into the nature of the novel composite. The results indicated that the CNTs were well dispersed and embedded throughout the alginate matrix to form an interconnected carbon-nanotube network on the base electrode. The performance Of this unique CNT-based detector has been demonstrated, in conjunction with CE, by separating and detecting five caffeic acid derivatives. The new CNT-based CE detector offered significantly lower operating potentials, substantially enhanced signal-to-noise characteristics, and a lower expense of operation. The simplicity and significant performance exhibited by the CNT-alginate composite modified electrode also indicate great promise for the use of this electrode in microchip CE, flowing-injection analysis, and other microfluidic analysis systems.
机译：该报告描述了新型碳纳米管（CNT）-藻酸盐复合修饰电极作为毛细管电泳（CE）的灵敏安培检测器的开发和应用。复合电极是根据碳纳米管电极在氯化钙水溶液中原位胶凝碳纳米管和海藻酸钠的混合物制成的。 SEM，能量色散光谱，XRD和FTIR光谱为新型复合材料的性质提供了见识。结果表明，碳纳米管在整个藻酸盐基质中分散良好并包埋，从而在基础电极上形成互连的碳纳米管网络。这种独特的基于CNT的检测器的性能已与CE结合，通过分离和检测五种咖啡酸衍生物得到了证明。新型基于CNT的CE检测器可显着降低工作电势，显着增强信噪比特性并降低运行成本。 CNT-藻酸盐复合修饰电极表现出的简单性和显着性能也表明该电极在微芯片CE，流动注射分析和其他微流体分析系统中的应用前景广阔。

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