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<p>This study investigates the synthesis and characterization of cerium-doped zinc oxide (Ce-ZnO) nanoparticles for the photocatalytic degradation of Eosin Y (EY) dye under sunlight irradiation. The prepared nanoparticles were characterized using SEM, EDX, FTIR, XRD, UV–visible spectroscopy, and PZC analysis, revealing densely packed, angular, and polyhedral particles with a wurtzite hexagonal crystalline structure and a band gap of 2.8&#xa0;eV. The PZC was determined to be 6.52. Photocatalytic experiments showed the highest EY degradation (98.11%) at 80&#xa0;min irradiation, pH 3, catalyst dosage of 0.01&#xa0;g, and dye concentration of 10&#xa0;ppm, with first-order kinetics and a rate constant of 0.0499&#xa0;s⁻<sup>1</sup>. Statistical analysis using response surface methodology (RSM) and ANOVA confirmed the significant influence of irradiation time, pH, catalyst dose, and dye concentration on degradation efficiency, with an R<sup>2</sup> value of 0.9939, validating the model's reliability. The obtained results highlight the efficiency of Ce-ZnO nanoparticles in the removal of water pollutant, with novelty in the effective cerium doping through hydrothermal method to enhance photocatalytic efficiency by reducing electron–hole recombination and combined with systematic parameter optimization using RSM for maximum degradation efficiency.</p>

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Photocatalytic degradation of Eosin Yellow dye using cerium-doped zinc oxide nanoparticles: optimization through response surface methodology desirability factor

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Muhammad Jawad,
  • Muhammad Zeeshan,
  • Muhammad Esa Afzal,
  • Muhammad Zakria,
  • F. Akbar Jan

摘要

This study investigates the synthesis and characterization of cerium-doped zinc oxide (Ce-ZnO) nanoparticles for the photocatalytic degradation of Eosin Y (EY) dye under sunlight irradiation. The prepared nanoparticles were characterized using SEM, EDX, FTIR, XRD, UV–visible spectroscopy, and PZC analysis, revealing densely packed, angular, and polyhedral particles with a wurtzite hexagonal crystalline structure and a band gap of 2.8 eV. The PZC was determined to be 6.52. Photocatalytic experiments showed the highest EY degradation (98.11%) at 80 min irradiation, pH 3, catalyst dosage of 0.01 g, and dye concentration of 10 ppm, with first-order kinetics and a rate constant of 0.0499 s⁻1. Statistical analysis using response surface methodology (RSM) and ANOVA confirmed the significant influence of irradiation time, pH, catalyst dose, and dye concentration on degradation efficiency, with an R2 value of 0.9939, validating the model's reliability. The obtained results highlight the efficiency of Ce-ZnO nanoparticles in the removal of water pollutant, with novelty in the effective cerium doping through hydrothermal method to enhance photocatalytic efficiency by reducing electron–hole recombination and combined with systematic parameter optimization using RSM for maximum degradation efficiency.