Visible light driven antibiotic degradation with metal-organic frameworks (MOFs) has been regarded as a feasible and efficient approach. Herein, Bi-based MOF (CAU-17) was synthesized and used for tetracycline (TC) removal. To enhance the photocatalytic performance, sulfur (S) element was doped on CAU-17 through solvothermal process. Characterization results verified that S element was successfully doped on CAU-17 and distributed uniformly. The introduction of S element could boost the generation of oxygen vacancies and tune the band gap of CAU-17. By optimizing the S content, the band gap energy (E_g) of CAU-17–0.02 S sample (0.02 g thiourea was added during the synthesis) reduces from 3.57 to 3.37 eV compared to pristine CAU-17. In addition, the visible light response was enhanced and the charge transfer resistance was reduced. TC removal tests demonstrated that CAU-17–0.02 S exhibited a removal efficiency of 62.9%, and the degradation rate constant is 1.44 times than that of bare CAU-17. Reactive species trapping experiment indicated h⁺,·OH and·O₂^- all promoted the degradation of TC, following the order of h⁺>·OH> ·O₂^-. Moreover, CAU-17–0^.02 S presented a good reusability with slight performance loss after four cycles.

金属有机骨架 (MOF) 的可见光驱动抗生素降解被认为是一种可行且有效的方法。在此，合成了基于铋的 MOF (CAU-17) 并将其用于去除四环素 (TC)。为了提高光催化性能，通过溶剂热法将硫 (S) 元素掺杂到 CAU-17 上。表征结果证实S元素成功掺杂在CAU-17上且分布均匀。S元素的引入可以促进氧空位的产生并调节CAU-17的带隙。通过优化 S 含量，带隙能量 (E _g) 的 CAU-17–0.02 S 样品（在合成过程中添加了 0.02 g 硫脲）与原始 CAU-17 相比从 3.57 减少到 3.37 eV。此外，可见光响应增强，电荷转移电阻降低。TC 去除试验表明，CAU-17–0.02 S 的去除效率为 62.9%，降解速率常数是 CAU-17 的 1.44 倍。活性物质捕获实验表明h ⁺、·OH和·O ₂ ^-均促进了TC的降解，其顺序为h ⁺ >·OH > ·O ₂ ^-。此外，CAU-17-0 ^。02 S 表现出良好的可重用性，在四个循环后性能略有下降。