文献类型：期刊文献

英文题名：Efficient catalytic ozonation of ciprofloxacin by Fe2O3-CoFe2O4 with dual-active sites: Degradation mechanism and environmental application

作者：Xie, Jiangling[1];Sun, Xianbo[1];Zhang, Dongping[1];Song, Yanyu[1];Liu, Yongdi[1];Nghiem, Long D.[2];Duan, Jun[3];Cai, Zhengqing[1,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Ultimo, NSW 2007, Australia;[3]Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200237, Peoples R China

年份：2025

卷号：13

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20252318540216);WOS:【SCI-EXPANDED(收录号:WOS:001501667900005)】；

基金：This study was financially supported by the National Natural Science Foundation of China (22176061, 41807340) , Natural Science Founda-tion of Shanghai [21ZR1415600] , and the Science and Technology Commission of Shanghai Municipality (21230712000) .

语种：英文

外文关键词：Catalytic ozonation; Heterojunction; Ciprofloxacin; Oxygen vacancy

摘要：In this study, Fe2O3-CoFe2O4 heterojunction with abundant Lewis acid sites and oxygen vacancies (OVS) was prepared and applied to catalytic ozonation of ciprofloxacin hydrochloride (CIP). Under the optimal conditions, the catalytic ozonation by CoFe5Ox (at optimum Fe/Co atomic ratio of 5) achieved 98.2 % of CIP degradation at 24 min, and the CIP mineralization reached 48.7 % at 60 min, which was 2.8 and 4.8 times greater than those without catalyst. Three radicals dominated the CIP degradation, with their contributions in the order of center dot OH > center dot O2- > 1O2, while the direct ozonation by O3 only contributed 36 % of the CIP removal. Experiments revealed that Lewis acid sites on CoFe5Ox promoted surface hydroxyl groups (S-OH), enhancing O3 adsorption/activation and contributing to > 70 % of CIP catalytic ozonation. The formation of heterojunction led to the generation of OVs, which in turn facilitated efficient electron transfer during the catalytic process. The electron exchange between Fe2+ and Co3+ facilitated the regeneration of Co2+, while OVs transferred CIP-provided electrons to facilitate the reduction of Fe3+ to Fe2+. The cycling between Fe3+/Fe2+ and Co3+/Co2+ enhanced both reactive oxygen species (ROS) generation and electron transfer. The degradation pathways were inferred by density functional theory (DFT) calculations and intermediates analysis. Most of the intermediates were found less toxic. CoFe5Ox exhibits a high degradation efficiency of up to 99.1 % for low-concentration CIP and effectively removes other antibiotics (>98 %), while demonstrating excellent economic viability and broad applicability. This study provides new perspectives for practical engineering applications of catalytic ozonation by heterojunction materials.