期刊
CHEMICAL ENGINEERING JOURNAL
卷 446, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137282
关键词
Adsorption-photodegradation; 3D lignosulfonate composited poly(vinyl formal) sponge; BiVO4/PANI/Ag ternary photocatalyst; Fluoroquinolone antibiotics; Adsorption-degradation mechanisms
资金
- National Natural Science Foundation of China [42061144014, 51978325]
- Quanzhou City Science & Technology Program of China [2021CT001]
In this study, a novel 3D lignosulfonate composited PVF sponge impregnated by BiVO4/PANI/Ag ternary photocatalyst was fabricated and showed excellent performance in the adsorption and photodegradation of fluoroquinolones antibiotics. BiVO4/PANI/Ag was well-dispersed and tightly bound to the composited sponge, which efficiently degraded the adsorbed antibiotics through surface photodegradation. The photocatalyst achieved high removal efficiency for all examined antibiotics and maintained a steady performance in continuous dynamic treatment.
In this work, a 3D lignosulfonate composited poly(vinyl formal) (PVF) sponge impregnated by BiVO4/polyaniline (PANI)/Ag ternary photocatalyst (PLS-BiVO4/PANI/Ag) was designed and fabricated. The synergistic adsorption-photodegradation of five fluoroquinolones (FQs) antibiotics onto PLS-BiVO4/PANI/Ag was investigated. Incorporating lignosulfonate as a carrier on PVF sponge improved its structural properties and enhanced its adsorption performance toward FQs. The BiVO4/PANI/Ag ternary photocatalyst was well-dispersed and tightly bound to the composited sponge, thus it efficiently degraded the adsorbed FQs through surface photodegradation. PLS-BiVO4/ PANI/Ag achieved > 90% removal efficiency for all examined FQs within 2.0 h in a batch system, while it maintained a steady 80% removal efficiency for 30.0 h in a continuous dynamic treatment system. Photoelectric characterizations and ESR results showed that BiVO4/PANI/Ag was consistent with the type II heterostructure and effectively improved the utilization of visible light and the separation of photogenerated electron-hole pairs. The hole was the dominant active species in the degradation of FQs, while the main degradation pathways included defluorination, decarboxylation and destruction of piperazine ring. The prepared composited sponge is thus characterized by its high performance, convenient operation, eco-friendliness, and practicality in real water treatment systems since it undergoes self-purification and is easily recovered from water without mass loss.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据