Boosting photo-Fenton process enabled by ligand-to-cluster charge transfer excitations in iron-based metal organic framework

Zhou, Xiao-Guo ¹Mu, Yang ¹Li, Qi ¹Li, Wen-Qiang ¹Wang, Yi-Xuan ¹Chen, Jia-Qi ¹Hou, Nan-Nan ¹Li, Yuan-Ming ¹Liu, Xiao-Cheng ¹Ding, Rong-Rong ¹Zhou, Guan-Nan¹

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作者信息

1. Univ Sci & Technol China
折叠

Abstract

Iron-based metal organic frameworks (MOFs) are widely adopted to mediate heterogeneous photo-Fenton reaction, but poor charge separation efficiency in iron-oxo clusters of MOF usually results in the dull Fe(III)/Fe(II) transformation. In this study, ligand-to-cluster charge transfer (LCCT) excitations were first introduced to photoFenton process toward accelerating Fe(III)/Fe(II) transformation by constructing new iron-based MOF nanorods with porphyrin ligand (Fe-TCPP). Fe-TCPP with LCCT excitations showed a maximum kinetic constant of 0.23 min-1 for ciprofloxacin (CIP) degradation at neutral pH under visible light irradiation, which is remarkably better than most of the state-of-the-art photocatalysts. Experimental and theoretical analyses collaboratively verify that LCCT excitations within Fe-TCPP dramatically accelerate Fe(III)/Fe(II) transformation, which generate more center dot OH for quick CIP elimination. Additionally, this LCCT excitations strategy is also effective for the photo-Fentonlike system induced by copper-based MOFs. Our study presents a novel strategy to intensify MOFs based photoFenton/Fenton-like processes, upon which the high-efficiency contaminant removal is expected.

Key words

Photo-Fenton/Fe-based metal organic frameworks/Ligand-to-cluster charge transfer excitations/Fe(III)/Fe(II) transformation/EFFICIENT/POLLUTANTS/SEPARATION/CONVERSION/OXIDATION/KINETICS

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量46

参考文献量62

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