Abstract

In this work, an electrochemical sensor based on glassy carbon electrode modified with nickel oxide nanoparticles assisted by ionic liquid was developed for selective determination of carbofuran in green vegetables. Controlled synthesis of NiO nanoparticles was carried out by aqueous chemical growth procedure. Synthesized NiO nanoparticles were found to be ostensible candidate for selective determination of carbofuran, which is a highly toxic and hazardous pesticide. The crystallinity and morphology of as-synthesized NiO was confirmed by XRD, EDXS, and SEM. The average size of IL-assisted NiO nanoparticles was calculated to be 22.7 nm. Cyclic voltammetry was employed to compare the electrochemical behavior of NiO nanoparticles-modified glassy carbon electrode using IL with bare glassy carbon electrode by discriminating oxidation peak current response. For the determination of carbofuran, the linear dynamic range for IL-assisted NiO nanoparticles was achieved as 5.0–305 µM with limit of detection 0.5 µM. The developed sensor was successfully applied for selective determination of carbofuran in real samples of green vegetables with the percent recoveries observed from 93.3 to 103.5.

Graphic abstract

中文翻译：

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基于离子液体稳定的氧化镍纳米粒子的电化学传感器超选择性测定呋喃丹

摘要

在这项工作中，开发了一种基于玻璃碳电极的电化学传感器，该电极被离子液体辅助的氧化镍纳米粒子修饰，用于选择性测定绿色蔬菜中的呋喃丹。NiO纳米粒子的控制合成通过水性化学生长程序进行。已发现合成的NiO纳米颗粒表面上可以选择性地确定呋喃丹，这是一种剧毒和有害的农药。XRD，EDXS和SEM证实了合成后的NiO的结晶度和形态。IL辅助的NiO纳米颗粒的平均尺寸经计算为22.7 nm。循环伏安法通过区分氧化峰电流响应，比较了使用IL和裸露的玻碳电极的NiO纳米粒子修饰的玻碳电极的电化学行为。对于测定呋喃丹，IL辅助NiO纳米颗粒的线性动态范围为5.0–305 µM，检出限为0.5 µM。研制成功的传感器已成功用于选择性测定绿色蔬菜实际样品中的呋喃丹，其回收率从93.3至103.5。

图形摘要