期刊
SMALL
卷 18, 期 52, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202204793
关键词
g-C; N-3; (4); kaolinite; N vacancies; peroxymonosulfate; photocatalysis; single Fe atoms; water treatments
类别
资金
- Beijing Natural Science Foundation [2202044, 2214076]
- Fundamental Research Funds for the Central Universities [2021JCCXHH04]
In this study, kaolinite was used as the support for g-C3N4 and single Fe atoms, resulting in an impressive degradation performance and catalytic stability. The introduction of kaolinite promoted the loading amount of single Fe atoms and improved the regulation of the electronic structure. This study opens up a new avenue for the design of clay-based SACs for water purification.
Single-atom catalysts (SACs) feature maximum atomic utilization efficiency; however, the loading amount, dispersibility, synthesis cost, and regulation of the electronic structure are factors that need to be considered in water treatment. In this study, kaolinite, a natural layered clay mineral, is applied as the support for g-C3N4 and single Fe atoms (FeSA-NGK). The FeSA-NGK composite exhibits an impressive degradation performance toward the target pollutant (>98% degradation rate in 10 min), and catalytic stability across consecutive runs (90% reactivity maintained after three runs in a fluidized-bed catalytic unit) under peroxymonosulfate (PMS)/visible light (Vis) synergetic system. The introduction of kaolinite promotes the loading amount of single Fe atoms (2.57 wt.%), which is a 14.2% increase compared to using a bare catalyst without kaolinite, and improved the concentration of N vacancies, thereby optimizing the regulation of the electronic structure of the single Fe atoms. It is discovered that the single Fe atoms successfully occupied five coordinated N atoms and combined with a neighboring N vacancy. Consequently, this regulated the local electronic structure of single Fe atoms, which drives the electrons of N atoms to accumulate on the Fe centers. This study opens an avenue for the design of clay-based SACs for water purification.
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