In this study, Co₃O₄-carbon composite was synthesized by calcined metal organic framework (MOF) ZIF-67 and used as efficient catalysts for ozonation of norfloxacin (NOF). The MOF-derived Co₃O₄-C composite remained similar polyhedrons structure of ZIF-67, suggesting that Co₃O₄ was well-dispersed in Co₃O₄-C composite. Furthermore, a larger amount of surface carbon-oxygen functional groups were distributed on Co₃O₄-C composite, which resulted in the diversification of active sites for catalytic ozonation reaction. NOF degradation and mineralization could be effectively enhanced in Co₃O₄-C/O₃ process. Moreover, NOF mineralization by catalytic ozonation strongly depended on the solution pH, while other operational conditions, such as O₃ concentration and catalyst dosage had not obvious influence on it. Co₃O₄-C composite could significantly accelerate O₃ decomposition to produce active free radicals (such as •OH), which enhanced the mineralization of NOF. The possible catalytic mechanism of Co₃O₄-C composite was proposed. Additionally, after five consecutive use of Co₃O₄-C composite in catalytic ozonation process, there was no obvious decrease in TOC removal efficiency, indicating a stable performance of Co₃O₄-C composite, which was suitable for the catalytic ozonation for wastewater treatment.

在本研究中，通过煅烧金属有机骨架（MOF）ZIF-67合成了Co ₃ O _4-碳复合材料，并用作有效的诺氟沙星（NOF）臭氧化催化剂。MOF衍生的Co ₃ O ₄ -C复合材料保持与ZIF-67相似的多面体结构，表明Co ₃ O ₄很好地分散在Co ₃ O ₄ -C复合材料中。此外，大量的表面碳-氧官能团分布在Co ₃ O ₄ -C复合材料上，导致催化臭氧化反应的活性位点多样化。钴中的NOF降解和矿化作用可以得到有效增强₃ O ₄ -C / O ₃工艺。此外，通过催化臭氧化法产生的NOF矿化作用在很大程度上取决于溶液的pH值，而其他操作条件（如O ₃浓度和催化剂用量）对其影响不明显。Co ₃ O ₄ -C复合材料可显着促进O ₃分解以产生活性自由基（例如•OH），从而增强NOF的矿化作用。提出了Co ₃ O ₄ -C复合材料可能的催化机理。此外，在连续使用Co ₃ O ₄后五次-C复合物在催化臭氧化过程中，TOC去除效率没有明显降低，表明Co ₃ O ₄ -C复合物性能稳定，适用于废水的催化臭氧化。