Sustainable electrochemical detection of catechol using a CuO@Polyaniline Nanocomposite: optimization and analytical performance via Box–Behnken design

IF 3.1 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2026-03-27 DOI:10.1007/s10008-026-06569-1

Jassem Wannassi, Pedro A. Salazar-Carballo, Soledad Carinelli, Hamza Kahri, Fraj Echouchene, Houcine Barhoumi

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引用次数: 0

Abstract

A copper oxide-based polyaniline nanocomposite (CuO@PANI) was used to modify a glassy carbon electrode (GCE) in order to create an electrochemical sensor, synthesized via in situ oxidative polymerization. The methods of Fourier transform infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) area of measurement analysis and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX) were used to thoroughly characterize the composite, including elemental mapping. These characterizations confirmed enhanced structural integrity, increased surface area and improved electrical conductivity arising from the presence of CuO nanoparticles and polyaniline. Electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV) and cyclic voltammetry (CV) were used to assess the improved electrode’s electrochemical performance, demonstrating significantly enhanced electron transfer kinetics and excellent electrochemical responsiveness. Box-Behnken methodology was used for the simultaneous optimization of the main experimental variables, therefore the optimal conditions were pH: 7.18, casting solution volume: 13 µL, drying time: 3.25 h, and accumulation time: 4.49 min. DPV measurements, after optimization, showed excellent sensitivity (17.823 A/M) and a broad linear range (0.001-10 µM) with a low limit of detection of about 1 nM. Interference and recoveries (98%-103%) tests confirmed the outstanding properties of the proposed sensor and the possibility to be used in real application for catechol contamination in environmental applications.

AbstractSection Graphical Abstract

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利用CuO@Polyaniline纳米复合材料持续电化学检测儿茶酚：Box-Behnken设计优化和分析性能

利用氧化铜基聚苯胺纳米复合材料（CuO@PANI）修饰玻碳电极（GCE），通过原位氧化聚合制备电化学传感器。采用傅里叶变换红外光谱（FT-IR）、x射线衍射（XRD）、热重分析（TGA）、brunauer - emmet - teller （BET）面积测量分析以及扫描电镜结合能量色散x射线能谱（SEM-EDX）等方法对复合材料进行了全面表征，包括元素作图。这些表征证实了CuO纳米颗粒和聚苯胺的存在增强了结构完整性、增加了表面积和提高了导电性。利用电化学阻抗谱（EIS）、差分脉冲伏安法（DPV）和循环伏安法（CV）对改进后的电极的电化学性能进行了评估，结果表明，改进后的电极的电子传递动力学和电化学响应性显著增强。采用Box-Behnken法对主要实验变量进行同步优化，得到最佳工艺条件为pH: 7.18，铸液体积：13µL，干燥时间：3.25 h，积累时间：4.49 min。优化后的DPV测量灵敏度为17.823 A/M，线性范围宽（0.001 ~ 10µM），低检出限约为1 nM。干扰和回收率（98%-103%）测试证实了所提出的传感器的卓越性能，以及在环境应用中用于儿茶酚污染的实际应用的可能性。摘要节图形摘要

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.