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<p>In this present investigation, the Bi<sub>2</sub>S<sub>3</sub>/BiOI nanocomposites were synthesized by using a simple one-step hydrothermal method. The obtained pristine Bi<sub>2</sub>S<sub>3</sub>, BiOI, and Bi<sub>2</sub>S<sub>3</sub>/BiOI nanocomposites were further evaluated for several physicochemical techniques. This Bi<sub>2</sub>S<sub>3</sub>/BiOI nanocomposite design effectively combines the superior electron transport properties of Bi<sub>2</sub>S<sub>3</sub> nanorods with the catalytic activity of BiOI nanosheets, leading to a remarkable improvement in electrochemical sensing performance. The Bi<sub>2</sub>S<sub>3</sub>/BiOI nanocomposites were incorporated with GCE to form a Bi<sub>2</sub>S<sub>3</sub>/BiOI/GCE electrode material, further used to detect the environmental pollutants as a Metol (MTL) drug. Several analytical techniques, such as cyclic voltammetry (CV) and differential pulse voltammetry (DPV), revealed a wide linear detection range of 0.5–50&#xa0;µM and a sensitivity of 1.80 μA μM<sup>−1</sup>&#xa0;cm<sup>−2</sup> with an exceptionally low limit of detection (LOD) of 1.35&#xa0;µM and 2.81&#xa0;µM. The improvements in sensitivity were attributed to the expanded active surface and optimized charge transfer properties. In real-time applicability, the as-proposed Bi<sub>2</sub>S<sub>3</sub>/BiOI/GCE sensor was used to detect the MTL drug in pond water and tap water with good sensory results. Overall, the obtained results suggest that our proposed Bi<sub>2</sub>S<sub>3</sub>/BiOI/GCE sensor has an efficient sensing material for a healthy environment. The work highlights Bi<sub>2</sub>S<sub>3</sub>/BiOI nanocomposites as a promising platform for reliable detection of MTL, offering insights into developing sustainable electrochemical sensors for environmental monitoring.</p> Graphical Abstract <p></p>

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Bi2S3/BiOI nanocomposite–based selective electrochemical detection of Metol in environmental water samples

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Nivetha Venkatesan,
  • Balaji Parasuraman,
  • Pazhanivel Thangavelu

摘要

In this present investigation, the Bi2S3/BiOI nanocomposites were synthesized by using a simple one-step hydrothermal method. The obtained pristine Bi2S3, BiOI, and Bi2S3/BiOI nanocomposites were further evaluated for several physicochemical techniques. This Bi2S3/BiOI nanocomposite design effectively combines the superior electron transport properties of Bi2S3 nanorods with the catalytic activity of BiOI nanosheets, leading to a remarkable improvement in electrochemical sensing performance. The Bi2S3/BiOI nanocomposites were incorporated with GCE to form a Bi2S3/BiOI/GCE electrode material, further used to detect the environmental pollutants as a Metol (MTL) drug. Several analytical techniques, such as cyclic voltammetry (CV) and differential pulse voltammetry (DPV), revealed a wide linear detection range of 0.5–50 µM and a sensitivity of 1.80 μA μM−1 cm−2 with an exceptionally low limit of detection (LOD) of 1.35 µM and 2.81 µM. The improvements in sensitivity were attributed to the expanded active surface and optimized charge transfer properties. In real-time applicability, the as-proposed Bi2S3/BiOI/GCE sensor was used to detect the MTL drug in pond water and tap water with good sensory results. Overall, the obtained results suggest that our proposed Bi2S3/BiOI/GCE sensor has an efficient sensing material for a healthy environment. The work highlights Bi2S3/BiOI nanocomposites as a promising platform for reliable detection of MTL, offering insights into developing sustainable electrochemical sensors for environmental monitoring.

Graphical Abstract