Issue 10, 2024, Issue in Progress

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

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

Article information

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

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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