期刊
CHEMICAL ENGINEERING JOURNAL
卷 419, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129969
关键词
Oxytetracycline; Plasmonic Z-scheme; Surface oxygen vacancies; Visible-light photocatalysis; Photothermal effect
资金
- National Natural Science Foundation of China [50808052, 51978232]
A defect-rich flower-like BiOBr combined with Ag nanoparticles and ultrathin g-C3N4 was prepared to construct a plasmonic Z-scheme heterojunction for efficient degradation of oxytetracycline. The results demonstrated the generation of a hierarchical plasmonic Z-scheme which led to the remarkable removal and mineralization of oxytetracycline. The catalyst showed excellent reusability and stability, with a unique spatial hierarchical framework contributing to its extraordinary performance.
For degradation of high-toxic oxytetracycline, defect-rich flower-like BiOBr is prepared and then is combined with both Ag nanoparticles and ultrathin g-C3N4 to construct a plasmonic Z-scheme heterojunction. The results manifest Ag nanoparticles transfer the pathway of the photo-generated carriers and generate a hierarchical plasmonic Z-scheme, leading to the generation of stronger center dot OH besides center dot O2- and h+ for efficient removal of oxytetracycline. During the visible-light photocatalysis process, the removal and mineralization rate of oxytetracycline can respectively achieve 91.7% and 56.2% in 60 min, and the pseudo-first-order rate constant reaches 33.8 min- 1 x 10-3, which is more remarkable than others. Meanwhile, the excellent reusability and stability of the catalyst are verified by cycle-degradation experiments, ICP-OES, X-ray diffraction and Electron spin resonance. It is considered the typical plasmonic Z-scheme, special morphology and surface oxygen vacancies work together to form a spatial hierarchical framework, leading to the extraordinary performance, even causing the photothermal effect to stimulate the activity of the Z-scheme photocatalyst. Furthermore, the degradation pathways of oxytetracycline and the photocatalytic mechanisms are particularly analyzed as well.
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