Development of an opto-electrochemical sensor for the detection of malathion using manganese metal–organic framework (Mn-MOF)

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Mechanical and Materials Engineering Pub Date : 2024-07-29 DOI:10.1186/s40712-024-00157-9

Lakshya Sankhla, Himmat Singh Kushwaha

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Abstract

This paper presents a new method for detecting malathion pesticides using a modified screen-printed electrode (SPE) with a fluorescence quenching technique. The manganese-based MOF was synthesized using the solvothermal method. The synthesized MOFs were characterized by transmission electron microscopy (TEM), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Raman spectroscopy. The material’s electrocatalytic properties were assessed via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Within the concentration range of 0.89 µM to 5.95 µM, the material’s response to malathion was analyzed with square wave voltammetry (SWV), giving rise to a detection limit of 39.097 nM. Fluorescence quenching studies have been carried out between 0.039 and 0.56 µM, with a lower detection limit of 62.03 nM. A sensor with good anti-interference properties was tested for selectivity and practicability in detecting malathion in real samples, proving its potential use in this area.

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利用锰金属有机框架（Mn-MOF）开发用于检测马拉硫磷的光电化学传感器

本文介绍了一种利用荧光淬灭技术的改良丝网印刷电极（SPE）检测马拉硫磷农药的新方法。本文采用溶热法合成了锰基 MOF。透射电子显微镜（TEM）、X 射线衍射（XRD）、傅立叶变换红外光谱（FT-IR）和拉曼光谱对合成的 MOFs 进行了表征。该材料的电催化特性通过电化学阻抗光谱法（EIS）和循环伏安法（CV）进行了评估。在 0.89 µM 至 5.95 µM 的浓度范围内，用方波伏安法（SWV）分析了材料对马拉硫磷的反应，检测限为 39.097 nM。在 0.039 至 0.56 µM 之间进行了荧光淬灭研究，检测下限为 62.03 nM。对具有良好抗干扰性能的传感器进行了选择性和实用性测试，以检测真实样品中的马拉硫磷，从而证明其在这一领域的潜在用途。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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