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<p>In this study, we have investigated the electrocatalytic properties of a nanohybrid composed of In<sub>2</sub>O<sub>3</sub> nanoparticles and a copolymer of PEDOT-PANI through a hydrothermal method followed by chemical oxidative polymerization using Camphorsulfonic acid (CSA) as an acidic dopant. The electrocatalytic activity of the nanohybrid was evaluated through catalytic studies using gallic acid (GA) as a model analyte and employing differential pulse voltammetry (DPV). The modified glassy carbon electrode (GCE) exhibited linear responses toward GA in the concentration range of 0.2 × 10<sup>−8</sup> to 1.2 × 10<sup>−9</sup>&#xa0;M, with a sensitivity of 3.102 µA/µM cm<sup>−2</sup>. The detection limit (DL) and quantification limit (QL) were determined to be 1.108 × 10<sup>–9</sup> and 2.1810 × 10<sup>–9</sup>&#xa0;M/µA, respectively, indicating the suitability of the nanohybrid for electrochemical sensing applications. Additionally, the nanocomposite demonstrated promising photocatalytic activity with a maximum efficiency of 99.5% toward methylene blue (MB) degradation within 160&#xa0;min. The interference of reactive hydroxide ions (OH<sup>●</sup>) formed during the degradation process was observed, but did not significantly affect the overall performance. This study highlights the potential of In<sub>2</sub>O<sub>3</sub>-PANI-PEDOT nanocomposites for use in electrochemical sensing and photocatalytic applications, with opportunities for further optimization and development of hybrids.</p>

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Fabrication of In2O3-PANI-PEDOT hybrid with boosted gallic acid electrochemical sensor and photocatalytic insights

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Munusamy Settu,
  • Gnanamoorthy Govindhan,
  • Bavani Thirugnanam,
  • Raja Venkatesan,
  • Maher M. Alrashed,
  • Seong-Cheol Kim

摘要

In this study, we have investigated the electrocatalytic properties of a nanohybrid composed of In2O3 nanoparticles and a copolymer of PEDOT-PANI through a hydrothermal method followed by chemical oxidative polymerization using Camphorsulfonic acid (CSA) as an acidic dopant. The electrocatalytic activity of the nanohybrid was evaluated through catalytic studies using gallic acid (GA) as a model analyte and employing differential pulse voltammetry (DPV). The modified glassy carbon electrode (GCE) exhibited linear responses toward GA in the concentration range of 0.2 × 10−8 to 1.2 × 10−9 M, with a sensitivity of 3.102 µA/µM cm−2. The detection limit (DL) and quantification limit (QL) were determined to be 1.108 × 10–9 and 2.1810 × 10–9 M/µA, respectively, indicating the suitability of the nanohybrid for electrochemical sensing applications. Additionally, the nanocomposite demonstrated promising photocatalytic activity with a maximum efficiency of 99.5% toward methylene blue (MB) degradation within 160 min. The interference of reactive hydroxide ions (OH●) formed during the degradation process was observed, but did not significantly affect the overall performance. This study highlights the potential of In2O3-PANI-PEDOT nanocomposites for use in electrochemical sensing and photocatalytic applications, with opportunities for further optimization and development of hybrids.