Electrochemical determination of cadmium ions in biological and environmental samples using a newly developed sensing platform made of nickel tungstate-doped multi-walled carbon nanotubes

IF 2.4 4区工程技术 Q3 ELECTROCHEMISTRY

Journal of Applied Electrochemistry Pub Date : 2023-09-12 DOI:10.1007/s10800-023-01976-y

Rabee H. R. Mohammed, Rabeay Y. A. Hassan, Rehab Mahmoud, Ahmed A. Farghali, Mohamed E.M. Hassouna

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引用次数: 1

Abstract

Abstract Simple and rapid analysis of cadmium ion in environmental and biological samples is of great importance due to the severe toxicity caused by this heavy metal. In the present work, nickel tungstate (NiWO 4 ) dispersion was mixed with multi-walled carbon nanotubes (MWCNTs) to obtain a homogenous composite of (NiWO 4 /MWCNTs) which was assigned as carbon paste electrode modifier. The composite was fully characterized using various characterization techniques including X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Thermo-Gravimetric Analysis (TGA) and Fourier Transform InfraRed (FTIR). The electrochemical redox reactions of cadmium (II) ions at the modified electrode interface were investigated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and linear sweep voltammetry (LSV). Effective parameters on the electro-analysis assay performance including the electrode composition, types of electrolyte, scan rate and pH were tested to achieve the best effective optimum conditions. Accordingly, a linear relation of cadmium ions was achieved in the concentration range 50–450 µM with limit of detection of 0.12 µM. Besides, the proposed electrode was successfully used to monitor trace amounts of cadmium ions in various real samples. Graphical abstract Schematic illustration of synthesis process of NiWO4/MWCN nanocomposite and its application as high-performance cadmium ion sensors

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新研制的钨酸镍掺杂多壁碳纳米管传感平台电化学测定生物和环境样品中的镉离子

环境和生物样品中镉离子的简单快速分析具有重要意义，因为这种重金属具有严重的毒性。在本工作中，钨酸镍(niwo4)分散体与多壁碳纳米管(MWCNTs)混合，得到了一种均匀的(niwo4 /MWCNTs)复合材料，该复合材料被指定为碳糊电极改性剂。利用x射线衍射(XRD)、扫描电镜(SEM)、热重分析(TGA)和傅里叶变换红外(FTIR)等多种表征技术对复合材料进行了全面表征。采用循环伏安法(CV)、差分脉冲伏安法(DPV)和线性扫描伏安法(LSV)研究了镉离子在改性电极界面上的电化学氧化还原反应。通过对电极组成、电解质类型、扫描速率和pH等影响电分析分析性能的有效参数进行测试，以获得最有效的优化条件。在50 ~ 450µM的浓度范围内，镉离子呈线性关系，检出限为0.12µM。此外，所提出的电极成功地用于监测各种实际样品中的痕量镉离子。NiWO4/MWCN纳米复合材料的合成工艺及其作为高性能镉离子传感器的应用示意图

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Electrochemistry 工程技术-电化学

CiteScore

4.70

自引率

3.40%

发文量

133

审稿时长

2.9 months

期刊介绍： The Journal of Applied Electrochemistry is the leading journal on technologically orientated aspects of electrochemistry. The interface between electrochemical science and engineering is highlighted, emphasizing the application of electrochemistry to technological development and practice, and documenting properties and data of materials; design factors, design methodologies, scale-up, economics and testing of electrochemical devices and processes. The broad range of technologies includes energy conversion, conservation, and storage, new battery systems, fuel cells, super capacitors, solar cells, power delivery, industrial synthesis, environmental remediation, cell design, corrosion, electrochemical reaction engineering, medical applications of electrochemistry and bio-electrochemistry, the electrochemical treatment of effluents, hydrometallurgy, molten salt and solid state electrochemistry, surface finishing, electroplating, electrodeposition, sensors, and applications of molecular electrochemistry. It also publishes invited reviewed articles, book reviews and news items and a comprehensive electrochemical events calendar.