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<p>This research introduces a cost-effective method for synthesizing CuO-CeO<sub>2</sub> nanocomposites via hydrothermal processing, yielding particles with sizes of 20–30&#xa0;nm. The nanocomposites exhibit impressive photocatalytic and antimicrobial properties. They demonstrate a direct band gap of 1.66&#xa0;eV and possess a nano-spherical morphology, as verified by FE-SEM analyses. EDAX analysis reveals the presence of O, Ce, and Cu. Under optimized conditions (pH 7–8, 10&#xa0;mg of catalyst, and 5 ppm of Orange G dye), the nanocomposites achieve 99.2% dye degradation under solar light, outperforming traditional binary oxides. Kinetic studies reveal a pseudo-first-order reaction, facilitated by the interaction between CuO and CeO<sub>2</sub>, that enhances charge separation and reactive oxygen species generation. Recyclability tests confirm strong stability, while antimicrobial tests indicate significant efficacy against various strains, including <i>Salmonella typhimurium</i>,<i> Pseudomonas aeruginosa</i>, and <i>Enterobacter aerogenes</i>, particularly at higher CuO ratios. These multifunctional nanocomposites show great potential for sustainable wastewater treatment and effective control of microbial contaminants.</p>

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Synergistic CuO-CeO2 nanocomposites with narrow band gap for high-performance photocatalysis under solar light irradiation and antibacterial action

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月1日

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  • A. Antony Arokya Sangeetha Devi,
  • D. Vasvini Mary,
  • K. Yesuraj,
  • S. Rubesh Ashok Kumar,
  • S. Anandh Jesuraj,
  • M. L. Ajin,
  • M. Priya Dharshini,
  • Mohanraj Kumar,
  • Mohd Shkir,
  • Sambasivam Sangaraju,
  • Prathap Somu

摘要

This research introduces a cost-effective method for synthesizing CuO-CeO2 nanocomposites via hydrothermal processing, yielding particles with sizes of 20–30 nm. The nanocomposites exhibit impressive photocatalytic and antimicrobial properties. They demonstrate a direct band gap of 1.66 eV and possess a nano-spherical morphology, as verified by FE-SEM analyses. EDAX analysis reveals the presence of O, Ce, and Cu. Under optimized conditions (pH 7–8, 10 mg of catalyst, and 5 ppm of Orange G dye), the nanocomposites achieve 99.2% dye degradation under solar light, outperforming traditional binary oxides. Kinetic studies reveal a pseudo-first-order reaction, facilitated by the interaction between CuO and CeO2, that enhances charge separation and reactive oxygen species generation. Recyclability tests confirm strong stability, while antimicrobial tests indicate significant efficacy against various strains, including Salmonella typhimurium, Pseudomonas aeruginosa, and Enterobacter aerogenes, particularly at higher CuO ratios. These multifunctional nanocomposites show great potential for sustainable wastewater treatment and effective control of microbial contaminants.