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There is a pressing need for larger-scale healthcare facilities due to the exponential growth of the global population, resulting in a substantial surge in the utilization of antibiotics. Ciprofloxacin (CIP) is one such persistent pharmaceutical contaminant that requires cutting-edge technology like advanced oxidation process (AOP) for its removal from wastewater. This work focuses on the examination of the solar photocatalytic degradation of CIP. Modified TiO2 catalysts were prepared by mixing TiO2 and Graphene Oxide (GO) in various proportions such as 2%, 3%, 4%, 5% and 6%. Among the different combinations, the 5% G (TG5) catalyst exhibited uniform size, crystallinity, lower band gap energy of 2.8 eV and improved absorption under visible light. Hence, TG5 was used for solar photocatalytic degradation studies. A 69.7% CIP degradation efficiency was attained within 120 min at an optimum pH of 8.4 and an initial CIP concentration of 3 mg/L and CIP preloaded TG5 of 1 g/L. The TG5 catalyst without CIP preloading exhibited enhanced degradation efficiency of 81.1% for CIP and 78.1% for TOC at 120 min.

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Solar Photocatalytic Treatment for the Degradation of Ciprofloxacin Using Modified TiO2

  • 会议论文

  • 发表日期：

    2025年

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  • Upasana Priyadarshini,
  • Parvees Ahamed,
  • Remya Neelancherry

摘要

There is a pressing need for larger-scale healthcare facilities due to the exponential growth of the global population, resulting in a substantial surge in the utilization of antibiotics. Ciprofloxacin (CIP) is one such persistent pharmaceutical contaminant that requires cutting-edge technology like advanced oxidation process (AOP) for its removal from wastewater. This work focuses on the examination of the solar photocatalytic degradation of CIP. Modified TiO2 catalysts were prepared by mixing TiO2 and Graphene Oxide (GO) in various proportions such as 2%, 3%, 4%, 5% and 6%. Among the different combinations, the 5% G (TG5) catalyst exhibited uniform size, crystallinity, lower band gap energy of 2.8 eV and improved absorption under visible light. Hence, TG5 was used for solar photocatalytic degradation studies. A 69.7% CIP degradation efficiency was attained within 120 min at an optimum pH of 8.4 and an initial CIP concentration of 3 mg/L and CIP preloaded TG5 of 1 g/L. The TG5 catalyst without CIP preloading exhibited enhanced degradation efficiency of 81.1% for CIP and 78.1% for TOC at 120 min.