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<p>With the continuous development of industrialized society, heavy metal ion pollution in nature, such as lead ions, has become increasingly common. Heavy metal ions are discharged into the environment and eventually enter the human body through the biological enrichment of the food chain, posing a serious threat to human health. This paper describes the construction of an electrochemical sensor based on a MoS<sub>2</sub>-C/Au/SPE nanocomposite electrode that detects trace amounts of lead ions in water using square wave anodic stripping voltammetry (SWASV). Electrochemical characterization results show that MoS<sub>2</sub>-C/Au/SPE has a higher electrode active area and conductivity. By optimizing key experimental parameters, we obtained a highly sensitive lead ion sensor based on the MoS<sub>2</sub>-C/Au/SPE nanocomposite electrode which exhibits excellent linear response to lead ions in the range of 0.2–5&#xa0;μM, with the highest sensitivity reaching 18.94&#xa0;μA/μM and a detection limit of 0.039&#xa0;μM, making it suitable for detecting lead ion content in environmental water samples.</p>

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An Electrochemical Sensor Based on MoS2-C/Au/SPE Nanocomposites Electrode for Detection of Lead Ions in Environmental Waters

  • 期刊论文

  • 发表日期：

    2025年7月5日

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  • Mei Wang,
  • Yingkuan Sun,
  • Hao Zheng,
  • Lei Yang,
  • Feilong Gong,
  • Lihua Gong,
  • Bin Li,
  • Liying Jiang

摘要

With the continuous development of industrialized society, heavy metal ion pollution in nature, such as lead ions, has become increasingly common. Heavy metal ions are discharged into the environment and eventually enter the human body through the biological enrichment of the food chain, posing a serious threat to human health. This paper describes the construction of an electrochemical sensor based on a MoS2-C/Au/SPE nanocomposite electrode that detects trace amounts of lead ions in water using square wave anodic stripping voltammetry (SWASV). Electrochemical characterization results show that MoS2-C/Au/SPE has a higher electrode active area and conductivity. By optimizing key experimental parameters, we obtained a highly sensitive lead ion sensor based on the MoS2-C/Au/SPE nanocomposite electrode which exhibits excellent linear response to lead ions in the range of 0.2–5 μM, with the highest sensitivity reaching 18.94 μA/μM and a detection limit of 0.039 μM, making it suitable for detecting lead ion content in environmental water samples.