Electrochemical Estimation of Cd and Cu Ions Simultaneously Using a Modified MgO/Fe2O3 Nanocomposite/Carbon Paste Electrode

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2023-10-09 DOI:10.1007/s12678-023-00843-w

Keriman M. Abd-Elsabur, Mohamed Abd-Elsabour, Fawzy H. Assaf, Ibrahem M. A. Hasan

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Abstract

Heavy metals are serious inorganic pollutants that need to be monitored in the hydrosphere with simple and cheap methods. Herein, a new sensor was fabricated by modifying a carbon paste electrode with MgO/Fe₂O₃ nanocomposite for simple, rapid, accurate, and highly sensitive simultaneous determination of Cd (II) and Cu (II) using differential pulse anodic stripping voltammetry. The electrochemical behavior of the constructed sensor was examined, and all parameters were optimized including deposition potential, time, pH, and scan rate. For Cd (II) and Cu (II), the respective detection limits were determined to be 3.3 × 10⁻¹¹ M and 3.6 × 10⁻¹¹ M, and the respective quantification limits were 1.1 × 10⁻¹⁰ M and 1.2 × 10⁻¹⁰ M. The sensor estimated Cd (II) and Cu (II) in Nile river, tap, and bottled real water samples with high recoveries ranging from 99 to 117%.

Graphical Abstract

Abstract Image

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改性MgO/Fe2O3纳米复合材料/碳糊电极对Cd和Cu离子的电化学评价

重金属是一种严重的无机污染物，需要用简单廉价的方法监测水圈中的重金属。本文采用MgO/Fe2O3纳米复合材料修饰碳膏电极，制备了一种新型传感器，用于差分脉冲阳极溶出伏安法同时测定Cd (II)和Cu (II)，简便、快速、准确、高灵敏度。测试了所构建传感器的电化学行为，并对沉积电位、时间、pH和扫描速率等参数进行了优化。Cd (II)和Cu (II)的检出限分别为3.3 × 10−11 M和3.6 × 10−11 M，定量限分别为1.1 × 10−10 M和1.2 × 10−10 M。该传感器对尼罗河、自来水和瓶装实水样中的Cd (II)和Cu (II)进行了检测，回收率为99 ~ 117%。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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