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<p>In the present study, TiO<sub>2</sub> nanotube (NTs) powders are synthesised via a potentiostatic reverse bias anodization (RBA) method in a two-electrode configuration, enabling the rapid formation of 2&#xa0;g of TiO<sub>2</sub> NTs within 30&#xa0;min under optimised conditions. The novelty of the work lies in the scalable and efficient synthesis approach, followed by the incorporation of metal nanoparticles (Pt and Pd) into TiO<sub>2</sub> nanoparticles to develop the Ti/Pt and Ti/Pd nanocomposite series with enhanced functional properties. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM) analyses are carried out to study the crystal structure and morphology. Electrochemical performance evaluated through cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy demonstrated improved charge storage behaviour. Photocatalytic activity was assessed using methylene blue (MB) as a model dye, where Ti/Pt15 NTs exhibited superior performance, achieving ~ 50% degradation within 90&#xa0;min, compared to ~ 37% for Ti/Pd15 NTs under identical conditions. Overall, this study demonstrates a rapid synthesis strategy combined with noble metal modification to develop TiO<sub>2</sub>-based nanocomposites with dual functionality in energy storage and environmental remediation. </p>

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Cost-effective RBA-synthesised TiO2 nanotubes and noble metal (Pt, Pd)-modified TiO2 nanocomposites for high-performance supercapacitor and photocatalytic applications

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • R. Mahesh,
  • S. Joseph Manoj Babu,
  • A. R. Baby Suganthi,
  • P. Sagayaraj,
  • R. Gunaseelan,
  • G. Ramalingam,
  • S. Selvakumar

摘要

In the present study, TiO2 nanotube (NTs) powders are synthesised via a potentiostatic reverse bias anodization (RBA) method in a two-electrode configuration, enabling the rapid formation of 2 g of TiO2 NTs within 30 min under optimised conditions. The novelty of the work lies in the scalable and efficient synthesis approach, followed by the incorporation of metal nanoparticles (Pt and Pd) into TiO2 nanoparticles to develop the Ti/Pt and Ti/Pd nanocomposite series with enhanced functional properties. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM) analyses are carried out to study the crystal structure and morphology. Electrochemical performance evaluated through cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy demonstrated improved charge storage behaviour. Photocatalytic activity was assessed using methylene blue (MB) as a model dye, where Ti/Pt15 NTs exhibited superior performance, achieving ~ 50% degradation within 90 min, compared to ~ 37% for Ti/Pd15 NTs under identical conditions. Overall, this study demonstrates a rapid synthesis strategy combined with noble metal modification to develop TiO2-based nanocomposites with dual functionality in energy storage and environmental remediation.