Abstract

In this study, we describe an electrochemical method for detecting Cd(II) ions, utilizing a glassy carbon electrode (GCE) modified with polythiophene (PTH)/multi-walled carbon nanotubes with grapheme (MECNTs-G), chitosan (CS), and CuO. The PTH/MWCNTs-G/CS/CuO was prepared via an in situ oxidative polymerization route. XRD and FT-TR analysis confirmed that the nanocomposites were successfully prepared. TEM, SEM, EDX, TGA, and DTG were utilized to study the morphological and thermal properties of the newly synthesized materials. The electrochemical detection of Cd(II) was achieved by CV and SWV. The cadmium ions exhibited a linear relationship at concentrations of 30–0.01 µM with the PTH/MWCNTs-G/CS/CuO/GCE. The limit of detection and limit of quantification were found to be 0.014 and 0.049 µM, respectively. The stability, selectivity, and reproducibility of the modified electrode were also studied. Good recovery was achieved for the practical application of PTH/MWCNTs-G/CS/CuO/GCE in a tap-water sample.

Graphic Abstract

中文翻译：

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使用聚噻吩、MWCNTs-G、CuO 和壳聚糖作为伏安传感器检测 Cd(II) 离子的复合纳米结构

摘要

在这项研究中，我们描述了一种检测 Cd(II) 离子的电化学方法，利用用聚噻吩 (PTH)/多壁碳纳米管与石墨烯 (MECNTs-G)、壳聚糖 (CS) 改性的玻璃碳电极 (GCE)，和氧化铜。PTH/MWCNTs-G/CS/CuO是通过原位氧化聚合途径制备的。XRD和FT-TR分析证实纳米复合材料制备成功。TEM、SEM、EDX、TGA 和 DTG 被用来研究新合成材料的形态和热性能。Cd(II)的电化学检测是通过CV和SWV实现的。镉离子在 30–0.01 µM 浓度下与 PTH/MWCNTs-G/CS/CuO/GCE 呈线性关系。检测限和定量限分别为 0.014 和 0.049 µM。稳定性、选择性、并对修饰电极的重现性进行了研究。PTH/MWCNTs-G/CS/CuO/GCE 在自来水样品中的实际应用实现了良好的回收率。

图形摘要