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Abstract <p>The pursuit of clean and sustainable energy solutions demands advanced, cost-effective materials with multiple functionalities. This study investigates CuO-TiO<sub>2</sub> nanocomposites (NCs), highlighting their supercapacitive and photocatalytic properties as promising solutions for energy storage and environmental remediation. The NCs achieve an exceptional 96% degradation of methylene blue (MB) in just 60&#xa0;min, demonstrating a high-rate constant of 0.06&#xa0;min<sup>−1</sup> with stability and recyclability up to 7 cycles. Electrochemical analysis shows an outstanding specific capacitance of 1394.88 F/g at 5&#xa0;mV/s, surpassing TiO<sub>2</sub> and CuO nanoparticles (NPs), with stable performance over 4,000 supercapacitive cycles. The NCs exhibit a remarkably low charge transfer resistance (6.52 Ω), ensuring rapid electron transport. High-resolution X-ray photoelectron spectroscopy confirms type-II band alignment at CuO-TiO<sub>2</sub> interface, enhancing the&#xa0;charge separation and minimizing recombination losses. Demonstrating stability across multiple photocatalytic and supercapacitive cycles, CuO-TiO<sub>2</sub> NCs emerge as a cost-effective, non-toxic, and efficient material for energy storage and wastewater treatment, paving the way for a cleaner and more sustainable future.</p> Graphical abstract <p></p>

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Investigating the supercapacitive and photocatalytic characteristics of CuO-TiO2 nanocomposites: a route towards clean and sustainable environment

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Jyoti Saroha,
  • Riya Malik,
  • Manjeet Singh,
  • Lalit Goswami,
  • Govind Gupta,
  • Praveen Tanwar,
  • C. K. Suman,
  • Mahesh Kumar,
  • Shailesh Narain Sharma

摘要

Abstract

The pursuit of clean and sustainable energy solutions demands advanced, cost-effective materials with multiple functionalities. This study investigates CuO-TiO2 nanocomposites (NCs), highlighting their supercapacitive and photocatalytic properties as promising solutions for energy storage and environmental remediation. The NCs achieve an exceptional 96% degradation of methylene blue (MB) in just 60 min, demonstrating a high-rate constant of 0.06 min−1 with stability and recyclability up to 7 cycles. Electrochemical analysis shows an outstanding specific capacitance of 1394.88 F/g at 5 mV/s, surpassing TiO2 and CuO nanoparticles (NPs), with stable performance over 4,000 supercapacitive cycles. The NCs exhibit a remarkably low charge transfer resistance (6.52 Ω), ensuring rapid electron transport. High-resolution X-ray photoelectron spectroscopy confirms type-II band alignment at CuO-TiO2 interface, enhancing the charge separation and minimizing recombination losses. Demonstrating stability across multiple photocatalytic and supercapacitive cycles, CuO-TiO2 NCs emerge as a cost-effective, non-toxic, and efficient material for energy storage and wastewater treatment, paving the way for a cleaner and more sustainable future.

Graphical abstract