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<p>In this work, the CuO/TiO<sub>2</sub> nanocomposite was synthesized via the hydrothermal method and then used as a working electrode for high performance hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) sensor using the electrochemical method. The synthesized CuO/TiO<sub>2</sub> nanocomposite was characterized to study its morphology, structure, elemental, and chemical composition. These included X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), and Energy-dispersive X-ray spectroscopy (EDX). Also, the fabricated CuO/TiO<sub>2</sub> nanocomposite&#xa0;electrodes were electrochemically characterized. Differential pulse voltammetry (DPV) responses of the fabricated&#xa0;electrode were recorded in phosphate buffer solution over a range of pH values from 5 to 9, obtaining the maximum current response at pH 6.5. Electrochemical measurements were conducted using PBS at pH 6.5. The current response of the fabricated electrode increased proportionally to the H<sub>2</sub>O<sub>2</sub>&#xa0;concentrations in a wide range of 10 to 100&#xa0;nM, investigated within a voltage window of -0.8&#xa0;V to 0.8&#xa0;V. The fabricated electrode presented enhanced electrochemical performance towards sensing H<sub>2</sub>O<sub>2</sub> with a low limit of detection of 13.95&#xa0;nM and a limit of quantification of 42.28&#xa0;nM. Finally, the results showed that CuO/TiO<sub>2</sub> nanocomposite was a promising electrode material with a fast response, excellent long-term stability, good repeatability, and reproducibility for sensing H<sub>2</sub>O<sub>2</sub>.</p>

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Fabrication and characterization of CuO/TiO2 nanomaterial-based electrodes for enhanced electrochemical sensing of hydrogen peroxide

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Shubam Chalotra,
  • Aman Dubey,
  • Anoop Singh,
  • Aamir Ahmed,
  • Ashok K. Sundramoorthy,
  • Sheng-Joue Young,
  • Yen-Lin Chu,
  • Sandeep Arya

摘要

In this work, the CuO/TiO2 nanocomposite was synthesized via the hydrothermal method and then used as a working electrode for high performance hydrogen peroxide (H2O2) sensor using the electrochemical method. The synthesized CuO/TiO2 nanocomposite was characterized to study its morphology, structure, elemental, and chemical composition. These included X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), and Energy-dispersive X-ray spectroscopy (EDX). Also, the fabricated CuO/TiO2 nanocomposite electrodes were electrochemically characterized. Differential pulse voltammetry (DPV) responses of the fabricated electrode were recorded in phosphate buffer solution over a range of pH values from 5 to 9, obtaining the maximum current response at pH 6.5. Electrochemical measurements were conducted using PBS at pH 6.5. The current response of the fabricated electrode increased proportionally to the H2O2 concentrations in a wide range of 10 to 100 nM, investigated within a voltage window of -0.8 V to 0.8 V. The fabricated electrode presented enhanced electrochemical performance towards sensing H2O2 with a low limit of detection of 13.95 nM and a limit of quantification of 42.28 nM. Finally, the results showed that CuO/TiO2 nanocomposite was a promising electrode material with a fast response, excellent long-term stability, good repeatability, and reproducibility for sensing H2O2.