随着我国各种疾病发病率的不断上升和医药行业的不断发展,对氟沙星型抗生素的需求不断增长。由于生产规模大,垃圾处理成本高,母体药物及其代谢物不断通过生活污水进入水环境,生产废水,和其他途径。近年来,氟沙星对水生环境的污染日益严重,使水环境中氟沙星的降解技术成为环境科学领域的研究热点。金属有机骨架(MOFs),作为一种新型的多孔材料,近年来引起了很多关注。在本文中,四种光催化材料,MIL-53(Fe),NH2-MIL-53(Fe),MIL-100(Fe),和g-C3N4合成并应用于氧氟沙星和恩诺沙星的去除研究。其中,MIL-100(Fe)材料表现出最佳的光催化效果。在可见光下3h后,氧氟沙星的降解效率达到95.1%,恩诺沙星基本完全降解。研究了不同材料对氟沙星可见光催化降解的影响。此外,恩诺沙星和氧氟沙星的光催化机理是通过使用三个捕集器(■O2-,h+,and▪OH),证明·O2-的作用促进了光催化下材料的降解效果。
With the rising incidence of various diseases in China and the constant development of the pharmaceutical industry, there is a growing demand for floxacin-type antibiotics. Due to the large-scale production and high cost of waste treatment, the parent drug and its metabolites constantly enter the water environment through domestic sewage, production wastewater, and other pathways. In recent years, the pollution of the aquatic environment by floxacin has become increasingly serious, making the technology to degrade floxacin in the aquatic environment a research hotspot in the field of environmental science. Metal-organic frameworks (MOFs), as a new type of porous material, have attracted much attention in recent years. In this paper, four photocatalytic materials, MIL-53(Fe), NH2-MIL-53(Fe), MIL-100(Fe), and g-C3N4, were synthesised and applied to the study of the removal of ofloxacin and
enrofloxacin. Among them, the MIL-100(Fe) material exhibited the best photocatalytic effect. The degradation efficiency of ofloxacin reached 95.1% after 3 h under visible light, while
enrofloxacin was basically completely degraded. The effects of different materials on the visible photocatalytic degradation of the floxacin were investigated. Furthermore, the photocatalytic mechanism of
enrofloxacin and ofloxacin was revealed by the use of three trappers (▪O2-, h+, and ▪OH), demonstrating that the role of ▪O2- promoted the degradation effect of the materials under photocatalysis.