Nano molybdenum disulfide (Nano-MoS₂) can be as a photocatalyst for antibiotic removal under visible light. However, the low energy of visible light and limited radicals restrict the applications of nano-MoS₂. In this study, ceria dioxide (CeO₂) rich in adsorbed oxygen was introduced into MoS₂@Z (MoS₂@Zeolite) to synthesize full-spectrum CeO₂/MoS₂@Z photocatalysts (CeO₂/MoS₂@Zs). The CeO₂/MoS₂@Z-3 (Ce: 1.5 mmol; Mo: 3.5 mmol) shows the best photocatalytic ability (98.32%) for tetracycline within 150 min, which is 18.20% improvement over MoS₂@Z. The UV–vis diffuse reflection spectra of photocatalysts shows that the ultraviolet absorption ability of CeO₂/MoS₂@Z-3 improved when CeO₂ was introduced. The active species trapping experiment and electron paramagnetic resonance (EPR) test prove h⁺ and superoxide radicals (•O₂⁻) are the main active species, and CeO₂ rich in adsorbed oxygen improves the amounts of •O₂⁻ in photocatalytic process. Moreover, singlet oxygen (¹O₂), producing by oxygen vacancies of CeO₂, also plays an important role. The enhanced photocatalytic activity is attributed to full-spectrum (200 nm–800 nm) absorption performance, improved content of •O₂⁻, and electron-hole (e⁻/h⁺) pairs separation. After five times recycle, the photodegradation efficiency of CeO₂/MoS₂@Z-3 only decreased by 2.59%. Meantime, the proposed three photocatalytic pathways show that tetracycline eventually degraded into small organics (like C₅H₈O₃), H₂O and CO₂ by dehydration, demethylation, deamination, dihydroxylation, deamidation, ring-opening reaction and carbonylation. The results show that CeO₂/MoS₂@Z-3 may become a high efficiency, stable, and promising photocatalyst for tetracycline wastewater treatment.

纳米二硫化钼（Nano-MoS ₂）可作为光催化剂在可见光下去除抗生素。然而，可见光的低能量和有限的自由基限制了纳米MoS ₂的应用。在本研究中，将富含吸附氧的二氧化铈 (CeO ₂ ) 引入 MoS ₂ @Z (MoS ₂ @Zeolite) 以合成全光谱 CeO ₂ /MoS ₂ @Z 光催化剂 (CeO ₂ /MoS ₂ @Zs)。CeO ₂ /MoS ₂ @Z-3（Ce：1.5 mmol；Mo：3.5 mmol）在150分钟内对四环素表现出最佳的光催化能力（98.32%），比MoS ₂提高了18.20%@Z。光催化剂的紫外-可见漫反射光谱表明，当引入CeO ₂时，CeO ₂ /MoS ₂ @Z-3的紫外吸收能力提高。活性物质捕获实验和电子顺磁共振（EPR）测试证明h ⁺和超氧自由基（•O ₂ ^-）是主要的活性物质，富含吸附氧的CeO ₂提高了光催化过程中•O ₂ ^-的量。此外，单线态氧 ( ¹ O ₂ )，由 CeO _{2 的}氧空位产生，也起着重要的作用。增强的光催化活性归因于全光谱 (200 nm–800 nm) 吸收性能、改进的 •O ₂ ^-含量和电子-空穴 (e ^- /h ⁺ ) 对分离。循环五次后，CeO ₂ /MoS ₂ @Z-3的光降解效率仅下降2.59%。同时，提出的三种光催化途径表明四环素最终降解为小的有机物（如 C ₅ H ₈ O ₃）、H ₂ O 和 CO ₂通过脱水、脱甲基、脱氨基、二羟基化、脱酰胺、开环反应和羰基化。结果表明，CeO ₂ /MoS ₂ @Z-3 可能成为一种高效、稳定、有前景的四环素废水处理光催化剂。