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<p>The rapid growth of population and industrialization has intensified water pollution, particularly from organic dyes and antibacterial contaminants. In this study, copper oxide/zinc oxide nanocomposites were synthesized via a simple aqueous chemical co-precipitation method and annealed at 400&#xa0;°C. Structural and optical properties were analyzed using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDX), ultraviolet–visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), and transmission electron microscopy (TEM). Photocatalytic activity was evaluated under visible light irradiation, achieving 71% degradation of quinoline yellow dye within 90&#xa0;min. Photoelectrochemical and scavenger studies confirmed enhanced charge separation and identified the dominant reactive species. Antibacterial performance showed a minimum inhibitory concentration of 250µgml<sup>− 1</sup> with inhibition zones of 18–19&#xa0;mm. The improved performance is attributed to the heterojunction formation between copper oxide and zinc oxide. These results demonstrate the potential of the nanocomposite for environmental remediation and antibacterial applications.</p>

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Synthesis and characterization of CuO/ZnO nanocomposites for quinoline yellow dye degradation and multifunctional applications

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • H. Premkumar,
  • S. Vadivel

摘要

The rapid growth of population and industrialization has intensified water pollution, particularly from organic dyes and antibacterial contaminants. In this study, copper oxide/zinc oxide nanocomposites were synthesized via a simple aqueous chemical co-precipitation method and annealed at 400 °C. Structural and optical properties were analyzed using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDX), ultraviolet–visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), and transmission electron microscopy (TEM). Photocatalytic activity was evaluated under visible light irradiation, achieving 71% degradation of quinoline yellow dye within 90 min. Photoelectrochemical and scavenger studies confirmed enhanced charge separation and identified the dominant reactive species. Antibacterial performance showed a minimum inhibitory concentration of 250µgml− 1 with inhibition zones of 18–19 mm. The improved performance is attributed to the heterojunction formation between copper oxide and zinc oxide. These results demonstrate the potential of the nanocomposite for environmental remediation and antibacterial applications.