Issue 10, 2024, Issue in Progress
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RSC Advances

Visible-light-driven photo-peroxidase catalysis: high-efficiency degradation of indole in water

Chongrui Xu,a   Ping Xue, ORCID logo *a   Rui Li,a   Juan Jia,a   Linmeng Maa  and  Peng Lia  

* Corresponding authors

a State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China
E-mail: ping@nxu.edu.cn

Abstract

The demand for H2O2 restricts the wider application of horseradish peroxidase (HRP) in degradation. In this work, a novel photoenzyme synergistic catalytic system was developed for high-efficiency degrading of indole in water by HRP without extra H2O2. The HRP was immobilized on CN-ZIF prepared by the combination of g-C3N4 and ZIF-8 to achieve photo-peroxidase catalyst HRP/Zn-CN-ZIF. Under visible light, photogenerated electrons and H2O2 from HRP/Zn-CN-ZIF participated in the biocatalytic cycle of HRP directly. As a result, the indole at 20 mg L−1 in water was degraded completely in 2 h by the HRP/Zn-CN-ZIF photoenzyme synergistic catalytic system without the addition of H2O2. Furthermore, HRP/Zn-CN-ZIF exhibited superior visible light absorption and charge transfer ability compared to g-C3N4. The results of the mechanism studies suggest that ·OH would play the most significant role from the HRP/Zn-CN-ZIF in indole degradation. This research provides an efficient approach for the removal of indole from water environments.

Graphical abstract: Visible-light-driven photo-peroxidase catalysis: high-efficiency degradation of indole in water

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Article information

DOI
https://doi.org/10.1039/D4RA00536H
Article type
Paper
Submitted
21 Jan 2024
Accepted
20 Feb 2024
First published
26 Feb 2024
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2024,14, 6874-6882

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Visible-light-driven photo-peroxidase catalysis: high-efficiency degradation of indole in water

C. Xu, P. Xue, R. Li, J. Jia, L. Ma and P. Li, RSC Adv., 2024, 14, 6874 DOI: 10.1039/D4RA00536H

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