ABSTRACT

In this study, NiFe₂O₄ and Ag_0.1Ni_0.95Fe₂O₄ were successfully prepared by the sol–gel method and applied to catalyze ozone for dibutyl phthalate (DBP) degrading. The synthesized catalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and vibrating sample magnetometer. The removal efficiency was compared with different catalyst dosage, pH condition, and initial DBP concentration for the two catalysts. The results showed that the introduction of Ag_0.1Ni_0.95Fe₂O₄ enhanced the ozone decomposition and the utilization efficiency of ozone from 32.2% (ozone alone) to 56.5% and improved the degradation efficiency of DBP significantly. The two catalysts both presented good recycling performance. Furthermore, the scavenger test displayed DBP degradation by catalytic ozonation dominated by OH in this study. These insights into the catalytic ozonation mechanism on Ag_0.1Ni_0.95Fe₂O₄ will advance their practical application to the catalytic degradation of organic pollutants.

摘要

本研究采用溶胶-凝胶法成功制备了NiFe ₂ O ₄和Ag _0.1 Ni _0.95 Fe ₂ O ₄，并应用于催化臭氧降解邻苯二甲酸二丁酯（DBP）。通过X射线衍射、傅里叶变换红外光谱和振动样品磁强计对合成的催化剂进行了表征。将两种催化剂的去除效率与不同的催化剂用量、pH 条件和初始 DBP 浓度进行比较。结果表明，Ag _0.1 Ni _0.95 Fe ₂ O ₄的引入将臭氧分解和臭氧利用效率从32.2%（仅臭氧）提高到56.5%，显着提高了DBP的降解效率。两种催化剂均表现出良好的回收性能。此外，在本研究中，清除剂测试显示 DBP 通过以 OH 为主的催化臭氧化作用降解。这些对 Ag _0.1 Ni _0.95 Fe ₂ O ₄催化臭氧化机理的深入了解将推进其在有机污染物催化降解中的实际应用。