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<p>In this study, cobalt oxide and copper-doped cobalt oxide nanoparticles were prepared using a photochemical reduction route. They were&#xa0;analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, Raman spectra, photoluminescence spectra, etc. X-ray specification method revealed a spinel crystal structure with nanoscale dimensions. The chemical states of each sample were investigated by XPS analysis. These nanoparticles were used as photocatalysts to break off dye molecules under the illumination of solar light. Methylene blue (MB) and Rhodamine 6G (R6G) are cationic dyes and were used as model wastewater pollutants to be exposed under solar light illumination for 105&#xa0;min to measure the photosynthetic activities of nanoparticles. Cu-implanted Co<sub>3</sub>O<sub>4</sub> degrades MB and R6G faster than pure Co<sub>3</sub>O<sub>4</sub>. Copper acts as electron electron-trapping agent and reduces the recombination of electron–hole pairs to enhance the photosynthetic properties of implanted Co<sub>3</sub>O<sub>4</sub>. In addition, electrochemical tests showed that the Cu-implanted Co<sub>3</sub>O<sub>4</sub> has a higher ion storage capacity. These exhaustive analyses show promising material to provide significant insights into structural and functional aspects of solar light-driven contaminated wastewater treatment and electrochemical properties.</p> Graphical abstract <p></p>

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Cu-implanted Co3O4 nanoparticles: Innovations in solar-powered catalysis, red LED applications, and supercapacitor energy storage

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • R. Silambarasan,
  • Ajay Ramesh,
  • D. Venkatesh,
  • Uttej Siva Sai Sundar Perisetti,
  • K. Anbalagan

摘要

In this study, cobalt oxide and copper-doped cobalt oxide nanoparticles were prepared using a photochemical reduction route. They were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, Raman spectra, photoluminescence spectra, etc. X-ray specification method revealed a spinel crystal structure with nanoscale dimensions. The chemical states of each sample were investigated by XPS analysis. These nanoparticles were used as photocatalysts to break off dye molecules under the illumination of solar light. Methylene blue (MB) and Rhodamine 6G (R6G) are cationic dyes and were used as model wastewater pollutants to be exposed under solar light illumination for 105 min to measure the photosynthetic activities of nanoparticles. Cu-implanted Co3O4 degrades MB and R6G faster than pure Co3O4. Copper acts as electron electron-trapping agent and reduces the recombination of electron–hole pairs to enhance the photosynthetic properties of implanted Co3O4. In addition, electrochemical tests showed that the Cu-implanted Co3O4 has a higher ion storage capacity. These exhaustive analyses show promising material to provide significant insights into structural and functional aspects of solar light-driven contaminated wastewater treatment and electrochemical properties.

Graphical abstract