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首页> 外文期刊>Microchimica Acta >Gold nanoparticle-coated multiwall carbon nanotube-modified electrode for electrochemical determination of methyl parathion
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Gold nanoparticle-coated multiwall carbon nanotube-modified electrode for electrochemical determination of methyl parathion

机译：纳米金包覆的多壁碳纳米管修饰电极用于甲基对硫磷的电化学测定

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摘要

We report on an electrochemical sensor for the determination of methyl parathion. It is based on an electrode modified with multi-walled carbon nanotubes that were covered with gold nanoparticles (Au-NPs). The vertically aligned array of MWCNTs on a tantalum substrate was coated with Au-NPs by overhead magnetron sputtering deposition. Scanning and transmission electron microscopy and XRD were used to characterize the Au-NP-MWCNTs composite. Cyclic voltammetry and differential pulse voltammetry were employed to evaluate the suitability of the new electrode for the determination of methyl parathion. Under the optimal conditions, the current response of the electrode to methyl parathion is linear in the range from 0.50 to 16.0 mg mL-1, with a detection limit of 50 μg mL-1 (signaloise = 3), and the sensitivity is 4.5 times better than that of the plain MWCNTs electrode. We conclude that this method represents a simple, rapid, effective and sensitive approach for the detection of methyl parathion.
机译：我们报告了用于测定甲基对硫磷的电化学传感器。它基于修饰有金纳米颗粒（Au-NPs）的多壁碳纳米管修饰的电极。通过架空磁控溅射沉积，用Au-NPs涂覆钽基板上垂直排列的MWCNTs阵列。扫描和透射电子显微镜和X射线衍射用来表征Au-NP-MWCNTs复合材料。采用循环伏安法和差分脉冲伏安法评估新电极对甲基对硫磷测定的适用性。在最佳条件下，电极对甲基对硫磷的电流响应在0.50至16.0 mg mL-1 范围内呈线性，检测极限为50μgmL-1 （信号/噪声= 3），灵敏度是普通MWCNTs电极的4.5倍。我们得出的结论是，该方法代表了一种检测甲基对硫磷的简单，快速，有效和灵敏的方法。

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  • 来源
    《Microchimica Acta》 |2011年第4期|p.309-314|共6页
  • 作者

    Jian-Chun Ma; Wei-De Zhang;

  • 作者单位

    School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, People’s Republic of China;

    School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, People’s Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Gold nanoparticles; Carbon nanotubes; Methyl parathion; Electrochemical sensor;

    机译：金纳米粒子;碳纳米管;甲基对硫磷;电化学传感器;

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