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<p>CeO<sub>2</sub>/WO<sub>3</sub> nanocomposites, with CeO<sub>2</sub> and WO<sub>3</sub> nanospheres, were synthesized and fully characterized by a modified hydrothermal method. The photocatalytic and adsorption capacity were tested using <i>[Cu(2-Pic)</i><sub><i>2</i></sub><i>(2-EtIm)]Cl</i><sub><i>2</i></sub> as the model pollutant in water and a mixture of water-acetonitrile (80:20 v/v). CeO<sub>2</sub>/WO<sub>3</sub> showed better photocatalytic performance due to improved charge separation and interfacial transfer, achieving a rate constant of 0.0568 compared to 0.0365 and 0.0437&#xa0;s<sup>−1</sup> for CeO<sub>2</sub> and WO<sub>3</sub>, respectively. The solvent molecules acted as scavengers in the photocatalytic process of Cu(II). Electrochemical studies using cyclic voltammetry, galvanostatic charge–discharge tests, and impedance spectroscopy revealed high specific capacitance and excellent cyclic stability for the CeO<sub>2</sub>/WO<sub>3</sub> composites, highlighting their dual potential in environmental and energy applications.</p> Graphical Abstract

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Enhancing Charge Carriers by Designing CeO2/WO3 Heterojunction for Degradation of Copper(II) Complex and Supercapacitor Studies

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • R. Silambarasan,
  • D. Venkatesh,
  • K. Umavathy,
  • S. Pavalamalar,
  • Uttej Siva Sai Sundar Perisetti,
  • K. Anbalagan

摘要

CeO2/WO3 nanocomposites, with CeO2 and WO3 nanospheres, were synthesized and fully characterized by a modified hydrothermal method. The photocatalytic and adsorption capacity were tested using [Cu(2-Pic)2(2-EtIm)]Cl2 as the model pollutant in water and a mixture of water-acetonitrile (80:20 v/v). CeO2/WO3 showed better photocatalytic performance due to improved charge separation and interfacial transfer, achieving a rate constant of 0.0568 compared to 0.0365 and 0.0437 s−1 for CeO2 and WO3, respectively. The solvent molecules acted as scavengers in the photocatalytic process of Cu(II). Electrochemical studies using cyclic voltammetry, galvanostatic charge–discharge tests, and impedance spectroscopy revealed high specific capacitance and excellent cyclic stability for the CeO2/WO3 composites, highlighting their dual potential in environmental and energy applications.

Graphical Abstract