Electrochemical Determination of Capsaicin at A Multiwalled Carbon Nanotubes/CuO Nanocomposite Modified Platinum Electrode

IF 4.1 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Cluster Science Pub Date : 2025-02-02 DOI:10.1007/s10876-025-02767-5

Onkarabile G. Pooe, Saheed E. Elugoke, Gloria E. Uwaya, Omolola E. Fayemi

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Abstract

Herein, electrochemical detection of capsaicin (CAP) in sauce and rub samples at a Pt electrode modified with copper oxide nanoparticles (CuO NPs) incorporated with functionalized multi-walled carbon nanotubes (fMWCNTs) was reported. The spectroscopic and microscopic characterization of CuO NPs, fMWCNTs and CuO/fMWCNTs nanocomposite with scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) spectroscopy and Fourier-transform infrared spectroscopy (FT-IR) spectroscopy confirmed that CuO/fMWCNTs was prepared from the nanomaterials. Electrochemical characterization of the bare Pt, the fMWCNTs-modified Pt, the CuO NP-modified Pt (Pt-CuO) and the CuO/fMWCNTs composite modified Pt (Pt-CuO/fMWCNTs) electrodes revealed that the Pt-CuO/fMWCNTs exhibited the best electron transfer capabilities. The limit of detection (LOD) and the linear range of CAP at Pt-CuO/fMWCNTs were 0.0881 and 0.357–2.73 µM, respectively. The proposed sensor offered outstanding percentage recovery of 106 and 102% when applied to the electroanalysis of CAP in spiked sauce and rub samples, respectively. Pt-CuO/fMWCNTs also retained about 88% of its initial current response when subjected to 25 cyclic voltammetry (CV) scans in the presence of CAP.

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多壁碳纳米管/CuO纳米复合修饰铂电极上辣椒素的电化学测定

本文报道了在氧化铜纳米粒子（CuO NPs）与功能化多壁碳纳米管（fMWCNTs）修饰的Pt电极上，对酱和摩擦样品中的辣椒素（CAP）进行电化学检测。利用扫描电镜（SEM）、透射电镜（TEM）、x射线衍射（XRD）和傅里叶变换红外光谱（FT-IR）对CuO NPs、fMWCNTs和CuO/fMWCNTs纳米复合材料进行了光谱和微观表征，证实了CuO/fMWCNTs是由纳米材料制备的。对裸Pt、fMWCNTs修饰Pt、CuO np修饰Pt （Pt-CuO）和CuO/fMWCNTs复合修饰Pt （Pt-CuO/fMWCNTs）电极的电化学表征表明，Pt-CuO/fMWCNTs电极表现出最佳的电子转移能力。Pt-CuO/fMWCNTs的检出限（LOD）为0.0881µM， CAP线性范围为0.357 ~ 2.73µM。当应用于加标酱油和摩擦样品的CAP电分析时，该传感器的回收率分别为106和102%。在CAP存在下进行25次循环伏安（CV）扫描时，Pt-CuO/fMWCNTs还保留了约88%的初始电流响应。

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来源期刊

Journal of Cluster Science 化学-无机化学与核化学

CiteScore

6.70

自引率

0.00%

发文量

166

审稿时长

3 months

期刊介绍： The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.