文献类型：期刊文献

英文题名：Solar driven levofloxacin degradation by C-doped oxygen-rich bismuth oxyhalide with SPR intensified built-in electric field: DFT study and toxicity evaluation

作者：Cai, Zhengqing[1,2];Cai, Yu[1];Pan, Ying[1];Song, Yanyu[1];Liu, Yongdi[1];Duan, Jun[3];Nghiem, Long D.[4];Sun, Xianbo[1]

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

年份：2025

卷号：1016

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20250617812519);WOS:【SCI-EXPANDED(收录号:WOS:001423391300001)】；

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：C -doped; Ag metal deposition; Photocatalytic degradation

摘要：Plasmon photocatalysts with surface deposited Ag0 were synthesized through photo-reduction of Ag+ on C0.4Bi24O31Br10. The optimal Ag ratio was found to be 10% for Ag0.1/C0.4-Bi24O31Br10, which exhibited 100% levofloxacin (LOF) degradation in 45 min under simulated solar light. The corresponding k-value was 4.2 and 2.0 times higher than those of Bi24O31Br10 and C0.4-Bi24O31Br10, respectively. The UV-vis DRS showed that Ag nanoparticles (NPs) induced surface plasmon resonance (SPR) effect significantly enhanced the visible light absorption from 485 to 680 nm. The band positions of catalysts were elucidated via Tauc plots, XPS valence spectra, and Mott-Schottky plots. PL, photocurrent response, and EIS showed that carrier recombination at the C0.4-Bi24O31Br10 interface was inhibited, and the interfacial charge transfer was accelerated. Free radical quenching experiments and electron paramagnetic resonance (EPR) tests revealed that center dot O2- was the main active species in the degradation of LOF, followed by h+ and 1O2. Based on the liquid chromatography-mass spectrometry (LC-MS) technique and density functional theory (DFT) calculations, two possible LOF degradation pathways were proposed, with the generated intermediates exhibiting reduced toxicity. Cycle experiments demonstrated that the LOF removal rate of the Ag0.1/C0.4-Bi24O31Br10 was maintained at 99.2 % after 4 cycles, exhibiting good stability. Furthermore, the effects of water parameters (pH, humic acid, and Cl-) on the photodegradation of LOF were investigated using Box-Behnken experimental design. The results showed that neutral pH was unfavorable for the degradation of LOF, while a high concentration of HA (>= 22.5 mg & sdot;L- 1) inhibited the degradation process. This study provides valuable insights into the design of highly efficient hybrid photocatalysts.