IF 5.7 2区 化学 Q1 CHEMISTRY, ANALYTICAL
Shuqin Chen, Wanfu Lan, Dapeng Yang, Jingying Xu, Yikun Hu, Hetong Lin, Liang Feng
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引用次数: 0

摘要

氧化乐果(DIM)是应用最广泛的有机磷杀虫剂(OPs)之一,因其杀虫效力高而被用于提高农业生产率。然而,过量使用 DIM 会导致土壤、地下水和食物受到广泛污染。鉴于 DIM 的潜在健康风险和过量残留对环境造成的危害,对环境和食品样本中 DIM 的监测至关重要。目前的检测方法设备昂贵、操作复杂,极大地限制了其实际应用。本文提出了一种基于 Ag2S/SnS2 光阳极、掺铁硼酸钴(CBFO)光阴极和分子印迹聚合物(MIPs)的自供电光电化学(PEC)传感平台,用于检测 DIM。掺硼酸钴(CBFO)光电阴极上的分子印迹聚合物使自供电 PEC 传感器具有高选择性。Ag2S/SnS2 光阳极提高了光阳极和光阴极之间的电子传递效率,从而提高了 PEC 传感器的灵敏度。自供电分子印迹 PEC 传感器对浓度为 1×10-2 至 1×105 nM 的 DIM 具有出色的灵敏度和选择性,检测限为 5.9 pM。在加标皇冠梨样品中实现了极好的回收率(95.4±2.6%、98.4±2.3%、106.3±3.3%),表明分子印迹 PEC 传感器能够检测实际样品中的 DIM。该研究为检测 DIM 提供了一种新型的简单、快速、高选择性和高灵敏度的自供电分子印迹光电化学传感平台。所制备的分子印迹光电化学传感器有望成为有机磷农药残留检测方法的候选材料,对食品安全和环境保护领域具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Self-powered photoelectrochemical sensor based on molecularly imprinted polymer-coupled CBFO photocathode and Ag2S/SnS2 photoanode for ultrasensitive dimethoate sensing

Self-powered photoelectrochemical sensor based on molecularly imprinted polymer-coupled CBFO photocathode and Ag2S/SnS2 photoanode for ultrasensitive dimethoate sensing
Dimethoate (DIM) is one of the most extensively applied organophosphorus pesticides (OPs), which is used to boost farm productivity due to its high insecticidal efficacy. However, the excessive use of DIM can result in the extensive contamination of soil, groundwater and food. Monitoring of DIM in environmental and food samples is crucial in view of its potential health risks and environmental hazards from excessive residues. The expensive equipment and complex operations for current detection methods greatly limit their practical applications. Herein, a self-powered photoelectrochemical (PEC) sensing platform based on Ag2S/SnS2 photoanode, iron-doped cobalt borate (CBFO) photocathode, and molecularly imprinted polymers (MIPs) was proposed for the detection of DIM. The molecularly imprinted polymers at CBFO photocathode endow the self-powered PEC sensor with high selectivity. The Ag2S/SnS2 photoanode enhances the efficient of electron transfer between the photoanode and photocathode, contributing to the high sensitivity of PEC sensor. The self-powered molecularly imprinted PEC sensor exhibits outstanding sensitivity and selectivity for DIM at concentrations from 1×10-2 to 1×105 nM with a detection limit of 5.9 pM. Excellent recoveries (95.4±2.6%, 98.4±2.3%, 106.3±3.3%) were achieved in spiked crown pear samples, indicating that the molecularly imprinted PEC sensor is capable of detecting DIM in real samples. This research provides a novel simple, fast, highly selective and sensitive self-powered molecularly imprinted photoelectrochemical sensing platform for detection of DIM. The fabricated PEC sensor offers a promising candidate for the detection method of organophosphorus pesticides residues, which is of great significance for the fields of food safety and environmental protection.
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来源期刊
Analytica Chimica Acta
Analytica Chimica Acta 化学-分析化学
CiteScore
10.40
自引率
6.50%
发文量
1081
审稿时长
38 days
期刊介绍: Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.
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