In this study, CeO₂ first was prepared via urea hydrolysis and calcination. Ag/AgCl–CeO₂ composite photocatalysts were fabricated by in situ interspersal of AgCl on CeO₂ and subsequent photoreduction of AgCl to Ag. The Ag/AgCl–CeO₂ composites exhibited enhanced photocatalytic activity for the photodegradation of norfloxacin (NOF) under visible light irradiation. A plausible degradation pathway for NOF was proposed via LC-MS analysis. The Ag/AgCl–CeO₂ composites exhibited effective mineralization ability toward the NOF molecule degradation based on three-dimensional excitation–emission matrix fluorescence spectroscopy (3D EEMs) and total organic carbon (TOC) analysis. Transient photocurrent response, PL spectrum, and EIS indicate higher photoinduced charge separation efficiency in Ag/AgCl–CeO₂ hybrid composites. Active species trapping experiments and an ESR technique confirmed that h⁺ and O₂⁻ were the main active groups involved in photodegradation of organic pollutants. Through the combination of various performance characterization and experimental results, a possible photocatalytic mechanism was proposed. Furthermore, the catalysts displayed excellent reusability and stability in four consecutive cycles. It is expected that the Ag/AgCl–CeO₂ hybrid composites could be used as photocatalysts for energy conversion and environmental remediation. This work can also provide a deeper understanding of the degradation pathway for NOF.

在这项研究中，首先通过尿素水解和煅烧制备CeO ₂。Ag / AgCl–CeO ₂复合光催化剂是通过在CeO ₂上原位散布AgCl并随后将AgCl光还原为Ag制备的。Ag / AgCl–CeO ₂复合材料在可见光照射下对诺氟沙星（NOF）的光降解表现出增强的光催化活性。通过LC-MS分析提出了一种可行的NOF降解途径。Ag / AgCl–CeO ₂基于三维激发-发射矩阵荧光光谱（3D EEM）和总有机碳（TOC）分析，复合材料对NOF分子降解具有有效的矿化能力。瞬态光电流响应，PL光谱和EIS表明，Ag / AgCl–CeO ₂杂化复合材料具有更高的光诱导电荷分离效率。活性物种捕获实验和ESR技术证实，^ h ⁺和Ø ₂ ^-是参与有机污染物光降解的主要活性基团。通过各种性能表征和实验结果的结合，提出了一种可能的光催化机理。此外，该催化剂在四个连续循环中显示出极好的可重复使用性和稳定性。预计Ag / AgCl–CeO ₂杂化复合材料可用作光催化剂，用于能量转换和环境修复。这项工作还可以提供对NOF降解途径的更深入了解。