期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 321, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.122054
关键词
Advanced oxidation process; Fe3+; Fe2+circulation; Persulfate; Metal-organic frameworks; Organic pollutant degradation
In this study, Fe-embedded Ni-based MOFs with heteroatomic metal nodes were successfully prepared and utilized for persulfate activation. The accelerated Fe3+/Fe2+ redox cycle in the FeNi-MOFs under light irradiation promoted the recovery of Fe2+ with a cycling efficiency of over 58%.
The sluggish regeneration rate of Fe2+ in Fe-based heterogeneous catalysts restricts their wider application in persulfate-based advanced oxidation process (PS-AOPs). To conquer such challenge, Fe-embedded Ni-based metal-organic frameworks (FeNi-MOFs) with heteroatomic metal nodes were prepared and employed for persulfate activation to construct highly efficient PS-AOPs. Spectral analyses and density functional theory (DFT) calculations elucidated that the ligand-to-metal charge transfer and polarization of adjacent Ni centers endowed accelerated Fe3+/Fe2+ redox cycle in the resultant FeNi-MOFs under light irradiation and thus promoted the Fe2+ recovery with Fe3+/Fe2+ cycling efficiency > 58%. Consequently, the FeNi-MOFs delivered remarkable performance in peroxodisulfate activation and higher specific activity than that of the control Ni-MOFs/Fe3+ and stateof-the-art catalysts reported to date. This study provides new avenue of the accelerating Fe3+/Fe2+ circulation in entirely heterogeneous systems for persulfate activation and also highlights the great potential of MOFs in design of high-performance Fe-based catalysts for PS-AOPs.
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