Magnetic ZnFe₂O₄/BiVO₄/g-C₃N₄ (ZBC) composites were prepared via a facile hydrothermal and calcination method for the degradation of a representative antibiotics lomefloxacin (LFX) under visible light irradiation. The optimal photocatalyst ZBC-10 with a ZnFe₂O₄:BiVO₄:g-C₃N₄ mass ratio of 1:8:10 performed 96.1% removal of LFX after 105 min of illumination. The excellent performance is ascribed to the effective construction of heterojunctions and its capacity to form a double Z-scheme charge transmission pathway among the hosts in ZBC-10. The composite enhanced the separation and migration of photoexcited charge carriers and the effective generation of multiple active radicals including ·OH, ·O₂⁻, and ¹O₂. The LFX degradation process, identified based on an integrated HPLC-Q-TOF-MS analysis and density functional theory computation of the Fukui indices, comprised of three pathways initiated by the opening of the piperazinyl ring, separation of piperazinyl and quinoline moieties, and cleavage of the pyridine ring on the quinoline moieties. Ecotoxicological evaluation confirmed the reduced toxicity of transformation intermediates over photocatalysis. Convenient magnetic recovery, high performance, and high recyclability made ZBC-10 a promising visible-light-activated photocatalyst for practical implementation in eliminating antibiotics from wastewater.

采用简便的水热法和煅烧法制备磁性ZnFe ₂ O ₄ /BiVO ₄ /gC ₃ N ₄ (ZBC)复合材料，用于在可见光照射下降解代表性抗生素洛美沙星(LFX)。ZnFe ₂ O ₄ :BiVO ₄ :gC ₃ N _{4的最佳光催化剂 ZBC-10}1:8:10 的质量比在 105 分钟照明后去除了 96.1% 的 LFX。优异的性能归因于异质结的有效构建及其在 ZBC-10 中的主体之间形成双 Z 型电荷传输路径的能力。该复合材料增强了光激发载流子的分离和迁移，并有效产生了多种活性自由基，包括· OH、· O ₂ ^-和¹ O ₂. LFX 降解过程，基于集成的 HPLC-Q-TOF-MS 分析和 Fukui 指数的密度泛函理论计算确定，由哌嗪基环的打开、哌嗪基和喹啉部分的分离和裂解引发的三个途径组成喹啉部分的吡啶环。生态毒理学评估证实了转化中间体相对于光催化的毒性降低。方便的磁力回收、高性能和高可回收性使 ZBC-10 成为一种很有前途的可见光活化光催化剂，可用于消除废水中的抗生素。