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<p>In the advanced oxidation process, photocatalytic degradation stands out as one of the most eco-friendly methods for treating wastewater. Recently, transition metal oxides and rare earth metal oxides supported heterogeneous nanomaterials have emerged as promising photocatalysts for the next generation. This study focuses on the efficient photocatalytic degradation of the moxifloxacin (MX) antibiotic using a lanthanide-infused WO<sub>3</sub>-based gC<sub>3</sub>N<sub>4</sub> nanomaterial (LWCN). The synthesized photocatalyst exhibited enhanced light absorption and high chemical stability, leading to a significant reduction in moxifloxacin in wastewater. The photocatalytic performance of the LWCN was examined by assessing the degradation of MX under different light exposure conditions. Experiments were conducted across varying initial concentrations of MX, revealing that degradation efficiency decreased with increasing antibiotic concentration. The obtained results show that the degradation percentage of the MX antibiotic (5 ppm) was exceptionally high, reaching 99.87% under sunlight (180&#xa0;min) and 99.8% under visible light (240&#xa0;min). Kinetic studies confirmed pseudo-first-order kinetics with rate constants (5 ppm − 8.27 × 10<sup>− 2</sup> min<sup>− 1</sup>), indicating that degradation rates decreased as antibiotic concentration increased. The LWCN nanomaterial demonstrates significant potential for effectively eliminating MX from aqueous environments, highlighting its applicability in wastewater treatment under natural sunlight and visible light conditions.</p>

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Z-Scheme-Inspired Lanthanide-Infused WO3/g-C3N4 Photocatalyst for Rapid Sunlight Degradation of Fluoroquinolone Antibiotics

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • S. Rubesh Ashok Kumar,
  • Mooni Siva Prasad,
  • D. Vasvini Mary,
  • P. Saravanan,
  • A. S. Vigneshraaj,
  • G. A. Suganya Josephine,
  • Mohammed Alsawat,
  • Krishna Prakash Arunachalam,
  • Mir Waqas Alam

摘要

In the advanced oxidation process, photocatalytic degradation stands out as one of the most eco-friendly methods for treating wastewater. Recently, transition metal oxides and rare earth metal oxides supported heterogeneous nanomaterials have emerged as promising photocatalysts for the next generation. This study focuses on the efficient photocatalytic degradation of the moxifloxacin (MX) antibiotic using a lanthanide-infused WO3-based gC3N4 nanomaterial (LWCN). The synthesized photocatalyst exhibited enhanced light absorption and high chemical stability, leading to a significant reduction in moxifloxacin in wastewater. The photocatalytic performance of the LWCN was examined by assessing the degradation of MX under different light exposure conditions. Experiments were conducted across varying initial concentrations of MX, revealing that degradation efficiency decreased with increasing antibiotic concentration. The obtained results show that the degradation percentage of the MX antibiotic (5 ppm) was exceptionally high, reaching 99.87% under sunlight (180 min) and 99.8% under visible light (240 min). Kinetic studies confirmed pseudo-first-order kinetics with rate constants (5 ppm − 8.27 × 10− 2 min− 1), indicating that degradation rates decreased as antibiotic concentration increased. The LWCN nanomaterial demonstrates significant potential for effectively eliminating MX from aqueous environments, highlighting its applicability in wastewater treatment under natural sunlight and visible light conditions.