Issue 12, 2023

Real roles of FeOCl nanosheets in Fenton process

Abstract

The discovery of valid catalytically active species in a catalytic system contributes to a more comprehensive understanding of the catalytic process and may improve its efficiency. Iron oxychloride (FeOCl) has been reported as an excellent novel Fenton-like catalyst. However, the nature of its outstanding activity remains highly uncertain. Herein, we clearly elucidate that FeOCl involves a homogeneous iron species in the Fenton and photo-Fenton processes, which plays a significant role in the reaction. It is also emphasized that the interaction of FeOCl with water is closely related to the dissolution of iron. Importantly, neglecting the acidic environment created by FeOCl when evaluating the contribution of dissolved iron-induced homogeneous reactions is a crucial reason for underestimating the homogeneous reactions. Hence, FeOCl can be considered a precatalyst for slow transformation in a homogeneous Fenton catalyst. This study contributes to the first insight into the role of dissolved iron in FeOCl-based AOP and suggests an extension of the role of structural features of FeOCl in catalytic processes.

Graphical abstract: Real roles of FeOCl nanosheets in Fenton process

Supplementary files

Article information

Article type
Paper
Submitted
14 set 2023
Accepted
25 out 2023
First published
25 out 2023

Environ. Sci.: Nano, 2023,10, 3414-3422

Real roles of FeOCl nanosheets in Fenton process

H. Chen, N. Wen, Y. Huang, Q. Peng, H. Zhou, Y. Zhu, H. Tian, X. Y. Kong, H. Zhu and L. Ye, Environ. Sci.: Nano, 2023, 10, 3414 DOI: 10.1039/D3EN00643C

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