In this study, Sn doped FeOCl (Sn–FeOCl) was synthesized using a one-step calcination method and employed as a non-homogeneous phase catalyst for the photo-Fenton degradation of tetracycline (TC). The catalyst was characterized using XRD, SEM, TEM, PL, FT-IR, EPR, Raman, and XPS techniques. The results indicate that the introduction of Sn enhanced visible light absorption and improved the separation efficiency of photogenerated electron-hole pair. Photo-Fenton experiments demonstrated that Sn–FeOCl-15 degraded Tetracycline by 94.7 % within 60 min under neutral solution, ambient temperature, and visible light conditions. Furthermore, the TC removal efficiency declined from 95 % to 83 % over five consecutive cycles, indicating robust structural stability. Lastly, a potential mechanism for TC degradation by Sn–FeOCl catalysts was proposed based on free radical trapping experiments. This research offers fresh insights for the advancement of photo-Fenton catalysts and the treatment of antibiotic organic wastewater.

中文翻译：

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Sn掺杂FeOCl的光电化学研究及光芬顿降解四环素


在这项研究中，采用一步煅烧法合成了 Sn 掺杂的 FeOCl (Sn–FeOCl)，并将其用作四环素 (TC) 光芬顿降解的非均相催化剂。使用 XRD、SEM、TEM、PL、FT-IR、EPR、拉曼和 XPS 技术对催化剂进行了表征。结果表明，Sn的引入增强了可见光吸收，提高了光生电子-空穴对的分离效率。 Photo-Fenton 实验表明，在中性溶液、环境温度和可见光条件下，Sn–FeOCl-15 在 60 分钟内将四环素降解了 94.7%。此外，连续五个循环后，TC 去除效率从 95% 下降至 83%，表明结构稳定性很强。最后，基于自由基捕获实验提出了 Sn-FeOCl 催化剂降解 TC 的潜在机制。这项研究为光芬顿催化剂的进步和抗生素有机废水的处理提供了新的见解。