CoNi(OH)x/CeO2/MoS2-MWCNTs composite electrode for ultrasensitive detection of methyl parathion in organophosphorus pesticides

IF 4.9 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchemical Journal Pub Date : 2024-09-04 DOI:10.1016/j.microc.2024.111567

Youwei Jiang, Chuanqin Zhou, Shuting Shi, Kun Wan, Aiting Chen, Nana Tang, Quanguo He

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Abstract

This research presents the development of a novel composite electrode material, CoNi(OH)/CeO/MoS-MWCNTs, synthesised via a two steps reflux process with ZIF-67 as precursor for the ultrasensitive detection of methyl parathion, a widely used organophosphorus pesticide. This electrode material demonstrates superior electrocatalytic activity and conductivity, enabling the rapid and accurate detection of methyl parathion residues in environmental and agricultural samples. The study extensively characterises the synthesised material using SEM, XRD, EDS, and EIS, confirming its unique nanostructure and elemental composition. The sensor exhibits a wide linear response range, high sensitivity, and a low detection limit of 0.1 nM, outperforming many existing methods. The practical application of the sensor is validated through objective sample analysis, showing high accuracy and reliability with recoveries between 98.4 % and 108 %. This work introduces a highly efficient sensor for methyl parathion detection and contributes to the broader application of nanocomposite materials in electrochemical sensing.

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用于超灵敏检测有机磷农药中甲基对硫磷的 CoNi(OH)x/CeO2/MoS2-MWCNTs 复合电极

本研究介绍了一种新型复合电极材料 CoNi(OH)/CeO/MoS-MWCNTs的开发情况，该材料以 ZIF-67 为前驱体，通过两步回流工艺合成，用于超灵敏检测甲基对硫磷（一种广泛使用的有机磷农药）。这种电极材料具有优异的电催化活性和导电性，能够快速准确地检测环境和农业样品中的甲基对硫磷残留。研究利用扫描电镜、XRD、EDS 和 EIS 对合成材料进行了广泛表征，确认了其独特的纳米结构和元素组成。该传感器的线性响应范围宽、灵敏度高，检测限低至 0.1 nM，优于许多现有方法。该传感器的实际应用通过客观的样品分析得到了验证，显示出很高的准确性和可靠性，回收率在 98.4 % 到 108 % 之间。这项工作介绍了一种用于甲基对硫磷检测的高效传感器，有助于纳米复合材料在电化学传感中的更广泛应用。

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来源期刊

Microchemical Journal 化学-分析化学

CiteScore

8.70

自引率

8.30%

发文量

1131

审稿时长

1.9 months

期刊介绍： The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field. Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.

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