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首页> 外文期刊>RSC Advances >Ultrasensitive electrochemical detection of methyl parathion pesticide based on cationic water-soluble pillar[5]arene and reduced graphene nanocomposite
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Ultrasensitive electrochemical detection of methyl parathion pesticide based on cationic water-soluble pillar[5]arene and reduced graphene nanocomposite

机译：基于阳离子水溶性柱[5]芳烃和还原石墨烯纳米复合材料的甲基对硫磷农药的超灵敏电化学检测

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We report a rapid, sensitive and selective electrochemical sensor based on pillar[5]arene (CP5) reduced graphene (rGO) nanohybrid-modified glassy carbon electrode CP5-rGO/GCE for the trace detection of methyl parathion (MP) by differential pulse voltammetry (DPV) for the first time. Compared to beta-cyclodextrin (β-CD)-functionalized reduced graphene (rGO)-modified GCE β-CD-rGO/GCE, the proposed CP5-rGO/GCE sensor exhibits excellent electrochemical catalytic activity, rapid response, high sensitivity, good reproducibility and anti-interference ability towards MP. The recognition mechanism of β-CD/MP and CP5/MP was studied by ~(1) H NMR. The results indicate a higher supramolecular recognition capability between CP5 and MP compared to that between β-CD and MP. The β-CD-rGO and CP5-rGO nano-composites were prepared via a wet chemistry approach. The resulting nano-composites have been characterized by thermogravimetric analysis (TGA), fourier transform infrared spectrometry (FTIR), charge transfer resistance ( R _(ct) ) and zeta potential. The CP5-rGO/GCE combines the merits of CP5 and rGO, and is used for quantitative detection of MP. It has a low detection limit of 0.0003 μM (S/N = 3) and a linear response range of 0.001–150 μM for MP. This method has been used to detect MP in soil and waste water samples with satisfactory results. This study provides a promising electrochemical sensing platform and is a promising tool for the rapid, facile and sensitive analysis of MP.
机译：我们报告了一种基于柱[5]芳烃（CP5）还原石墨烯（rGO）纳米杂化修饰玻碳电极CP5-rGO / GCE的快速，灵敏和选择性的电化学传感器，用于通过差分脉冲伏安法痕量检测甲基对硫磷（MP） （DPV）。与β-环糊精（β-CD）-功能化的还原石墨烯（rGO）修饰的GCEβ-CD-rGO/ GCE相比，建议的CP5-rGO / GCE传感器具有优异的电化学催化活性，快速响应，高灵敏度，重现性佳对MP的抗干扰能力。通过〜（1）1 H NMR研究了β-CD/ MP和CP5 / MP的识别机理。结果表明，与β-CD和MP相比，CP5和MP之间的超分子识别能力更高。通过湿化学方法制备了β-CD-rGO和CP5-rGO纳米复合材料。所得的纳米复合材料已通过热重分析（TGA），傅立叶变换红外光谱（FTIR），电荷转移电阻（R_（ct））和Zeta电位进行了表征。 CP5-rGO / GCE结合了CP5和rGO的优点，用于定量检测MP。它对MP的检测下限为0.0003μM（S / N = 3），线性响应范围为0.001–150μM。该方法已用于检测土壤和废水样品中的MP，结果令人满意。这项研究提供了一个有前途的电化学传感平台，是用于MP的快速，便捷和灵敏分析的有前途的工具。

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