Fabrication of TiO2/CuFeO2 composites for oxytetracycline degradation through heterogeneous photo-Fenton-like process under visible light

作者：Xue Li, Jinying Li, Jiaying Song, Zhiying Li, Xicheng Yuan, Lingyun Meng, Wenzhuo Xu, Qianwen Wang, Qinghua Yan, Shuaishuai Xin, Chengzhi Zhou, Guocheng Liu, Yanjun Xin · 发表于：Journal of Environmental Management · 年份：2025 · DOI：10.1016/j.jenvman.2025.125932 · 被引用次数：7 · 研究领域：Advanced Photocatalysis Techniques、Nanomaterials for catalytic reactions、TiO2 Photocatalysis and Solar Cells

The heterogeneous photo-Fenton-like (HPF-like) catalyst TiO 2 /CuFeO 2 was prepared by ball-milling and calcination for oxytetracycline (OTC) degradation. The systematic characterization indicated that the dispersion of TiO 2 nanoparticles onto CuFeO 2 improved visible light absorption and promoted electron transfer through heterojunction structure, benefitting photocatalytic activity. The optimum conditions were specified as 0.15 g/L TiO 2 /CuFeO 2 -0.3, 30 mM H 2 O 2 , and pH 9 through response surface methodology for HPF-like catalytic degradation efficiency (∼90 %) towards OTC. The TiO 2 /CuFeO 2 -0.3 showed superior reusability and stability, and also it had better degradation performance towards other tetracycline antibiotics. The quenching experiment and electron spin resonance analysis revealed two predominant active species (•O 2 − and •OH) in the HPF-like reaction. The increased separation and transfer of photogenerated carriers due to Z-scheme heterojunction and in-situ Fe 3+ /Fe 2+ and Cu 2+ /Cu + cycles were proposed to promote reactive oxygen species generation. The HPF-like system of TiO 2 /CuFeO 2 composites may be an effective strategy for antibiotic degradation in water.