Simultaneous electrochemical detection of Cd2+ and Pb2+ using a green silver nanoparticles/polyaniline-modified carbon paste electrode

IF 4.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

RSC Advances Pub Date : 2025-08-21 DOI:10.1039/D5RA03135D

Djihane Slimane Ben Ali, Ferial Krid, Ahlem Sarra Saadi, Mouna Nacef, Habiba Tabet and Mohamed Lyamine Chelaghmia

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Abstract

In this study, a novel electrochemical sensor based on a carbon paste electrode (CPE) modified with polyaniline (PANI) and green-synthesized silver nanoparticles (AgNPs) was developed for the simultaneous detection of cadmium (Cd²⁺) and lead (Pb²⁺) ions in aqueous solutions. The AgNPs were synthesized using a green route employing plant extract as a reducing and capping agent, ensuring environmental sustainability. The modified electrode (AgNPs-PANI-CPE) was characterized by UV-Vis spectroscopy, field-emission gun scanning electron microscopy (FEG-SEM), and simultaneous thermal analysis (TGA/DSC). The electrochemical behavior of Cd²⁺ and Pb²⁺ was investigated using square wave voltammetry (SWV) and CV. The sensor exhibited distinct and well-separated anodic peaks for Cd²⁺ and Pb²⁺, with excellent sensitivity, wide linear response ranges, and low detection limits (0.09 and 0.05 μg L⁻¹, respectively). Interference studies demonstrated good selectivity towards the target ions, and successful application to real water samples confirmed its analytical performance. This work highlights the potential of eco-friendly nanocomposite-modified electrodes in environmental monitoring of toxic heavy metals.

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绿色纳米银/聚苯胺修饰碳糊电极同时电化学检测Cd2+和Pb2+

在这项研究中，基于聚苯胺（PANI）和绿色合成的纳米银（AgNPs）修饰的碳糊电极（CPE）开发了一种新型电化学传感器，用于同时检测水溶液中的镉（Cd2+）和铅（Pb2+）离子。AgNPs采用绿色路线合成，采用植物提取物作为还原和封盖剂，确保了环境的可持续性。通过紫外可见光谱（UV-Vis）、场发射枪扫描电镜（fg - sem）和热分析（TGA/DSC）对改性电极（AgNPs-PANI-CPE）进行了表征。采用方波伏安法（SWV）和CV法研究了Cd2+和Pb2+的电化学行为。该传感器对Cd2+和Pb2+表现出明显且分离良好的阳极峰，具有良好的灵敏度、宽的线性响应范围和低的检出限（分别为0.09和0.05 μg L−1）。干扰实验表明，该方法对目标离子具有良好的选择性，并成功应用于实际水样中，证实了其分析性能。这项工作强调了环保纳米复合材料修饰电极在有毒重金属环境监测中的潜力。

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来源期刊

RSC Advances chemical sciences-

CiteScore

7.50

自引率

2.60%

发文量

3116

审稿时长

1.6 months

期刊介绍： An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.