Heterogeneous catalytic ozonation (HCO) emerges as a promising chemical industrial wastewater treatment solution, offering enhanced ozone utilization and reduced secondary pollutants. However, challenges in scaling HCO arise from a limited understanding of the catalytic mechanisms of metal oxides, particularly in generating active ozone sites. Here, we demonstrated the improvement of catalytic ozonation efficiency by enhancing the covalent bonding between FeO in Fe/Co spinel oxides. This alteration exploits the stronger electron-donating capacity of Fe (II), enhancing FeOM bonds and electron enrichment at iron sites, leading to a significant reduction in the activation energy for ozone. Pilot experiments demonstrated a 75.3% COD removal efficiency and a threefold increase in ozone utilization efficiency compared to pure ozone system for chemical industrial wastewater treatment. This study not only advances our understanding of spinel oxides in ozone catalysis but also opens new avenues for practical HCO applications in water treatment.

中文翻译：

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调节 Fe2O 共价可增强尖晶石氧化物的催化臭氧化，用于化学工业废水净化


非均相催化臭氧化 (HCO) 是一种很有前景的化学工业废水处理解决方案，可提高臭氧利用率并减少二次污染物。然而，由于对金属氧化物催化机制的了解有限，特别是在产生活性臭氧位点方面，缩放 HCO 面临的挑战。在这里，我们证明了通过增强 Fe/Co 尖晶石氧化物中 Fe - O 之间的共价键来提高催化臭氧化效率。这种改变利用了Fe(II)更强的给电子能力，增强了Fe - O - M键和铁位点的电子富集，导致臭氧活化能显着降低。中试实验表明，与纯臭氧系统相比，化学工业废水处理的COD去除率达到75.3%，臭氧利用效率提高了三倍。这项研究不仅增进了我们对臭氧催化中尖晶石氧化物的理解，而且为 HCO 在水处理中的实际应用开辟了新途径。