Individual and Simultaneous Determination of Heavy Metal Ions Using Carbon Paste Electrode Modified with Titania Nanoparticles

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2023-05-01 DOI:10.1007/s12678-023-00824-z

Elif Tüzün, Gülten Atun

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引用次数: 1

Abstract

In the development of ultrasensitive and selective sensors for heavy metal ions, the fabrication of titania-modified carbon paste electrodes with electrochemical sensing capabilities has received considerable attention. In this study, we investigated the facile preparation of the titania-modified carbon paste electrode and the determination of trace amounts of hazardous Hg(II), Cu(II), and Pb(II) ions by applying the square wave anodic stripping voltammetry method. The titania nanoparticles were characterized using various techniques such as size analyzer, XRD, and FTIR to determine their chemical properties. The experimental findings demonstrated that the titania nanoparticles were uniformly distributed in the graphite used to construct the modified electrode and had an average particle size of 85 nm in crystalline anatase form. Compared with the measurement results, the prepared sensor exhibited excellent sensing performance against Hg(II), Cu(II), and Pb(II) ions with a low detection limit of 15.26, 0.56, and 1.65 nM, respectively. In ternary solutions, their simultaneous determinations showed that the electrode is more sensitive to Hg(II) and Pb(II) ions, with detection limits of 8.32 and 0.25 nM, respectively. Consequently, the experimental results showed that the titania-modified carbon paste electrode is a promising sensor for the determination of hazardous Hg(II), Cu(II) and Pb(II) ions in sensor applications.

Graphical Abstract

Abstract Image

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纳米二氧化钛修饰碳糊电极单独测定和同时测定重金属离子

在重金属离子超灵敏和选择性传感器的发展中，具有电化学传感能力的钛改性碳糊电极的制备受到了广泛的关注。本研究采用方波阳极溶出伏安法研究了钛修饰碳膏电极的简易制备及痕量有害离子Hg(II)、Cu(II)和Pb(II)的测定。利用粒度分析仪、XRD、FTIR等技术对纳米二氧化钛进行了表征，以确定其化学性质。实验结果表明，二氧化钛纳米颗粒均匀分布在构建修饰电极的石墨中，平均粒径为85 nm，呈锐钛矿晶体形式。与测量结果相比，所制备的传感器对Hg(II)、Cu(II)和Pb(II)离子具有良好的传感性能，检测限分别为15.26、0.56和1.65 nM。在三元溶液中，电极对Hg(II)和Pb(II)离子更敏感，检出限分别为8.32 nM和0.25 nM。因此，实验结果表明，钛改性碳糊电极是一种很有前途的传感器，可用于有害汞(II)、铜(II)和铅(II)离子的检测。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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