Guangxi University, Nanning, 530004, China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China.
Environ Sci Pollut Res Int. 2021 Dec;28(48):69301-69313. doi: 10.1007/s11356-021-15498-7. Epub 2021 Jul 22.
The heterogeneous photo-Fenton-like process is emerging as a promising treatment of antibiotics-containing wastewater. The preparation of new efficient and stable catalysts is one of the research fields. A composite catalyst, prussian blue (PB) modified CeO was prepared, characterized, and applied for photo-Fenton oxidation of norfloxacin (NOR) in this study. It was found that chemical doping of PB leaded to more oxygen vacancies and increased the surface area of CeO obviously. PB/CeO with more Ce facilitated electron transfer between Fe/Fe with Ce/Ce. PB could also improve the separation rate of photoexcited electron-hole pairs in CeO nanostructures. When the doping ratio of PB and CeO was 10%, PB/CeO show the highest catalytic degradation ability and 88.93% of NOR could be degraded within 30 min. PB/CeO composite showed well reactivity at the wide pH value range of 3-8. The reusable experiments and low iron dissolution with less than 1 mg/L indicated that PB/CeO could be employed as an efficient heterogeneous photo-Fenton-like catalyst in organic contaminants degradation.
非均相类芬顿反应作为一种有前途的抗生素废水处理方法正在兴起。制备新型高效稳定催化剂是研究领域之一。本研究制备了一种复合催化剂普鲁士蓝（PB）修饰的 CeO，并对其进行了表征，用于诺氟沙星（NOR）的光芬顿氧化。结果表明，PB 的化学掺杂导致氧空位增多，CeO 的比表面积明显增大。PB/CeO 中更多的 Ce 促进了 Fe/Fe 与 Ce/Ce 之间的电子转移。PB 还可以提高 CeO 纳米结构中光生电子-空穴对的分离速率。当 PB 和 CeO 的掺杂比为 10%时，PB/CeO 表现出最高的催化降解能力，在 30 min 内可降解 88.93%的 NOR。PB/CeO 复合催化剂在 3-8 的宽 pH 值范围内具有良好的反应活性。可重复使用实验和铁溶解率低（低于 1 mg/L）表明，PB/CeO 可作为一种高效的非均相类芬顿催化剂，用于有机污染物的降解。
