Micromotor-assisted highly efficient Fenton catalysis by a laccase/Fe-BTC-NiFe2O4 nanozyme hybrid with a 3D hierarchical structure

Jie Yang; Jia Li; Dickon H. L. Ng; Ping Yang; Wenning Yang; Yong Liu

doi:10.1039/C9EN01443H

Micromotor-assisted highly efficient Fenton catalysis by a laccase/Fe-BTC-NiFe₂O₄ nanozyme hybrid with a 3D hierarchical structure†

Jie Yang,^a Jia Li,

*^a Dickon H. L. Ng,^bc Ping Yang,

*^a Wenning Yang^a and Yong Liu^a

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* Corresponding authors

^a School of Material Science and Engineering, University of Jinan, Jinan, P. R. China
E-mail: mse_lij@ujn.edu.cn, mse_YangP@ujn.edu.cn

^b Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China

^c Key Laboratory of Materials Processing & Mold, Ministry of Education, Zhengzhou University, Zhengzhou, P. R. China

Abstract

Self-propelled micro- and nanomotors are a current research focus and have shown attractive potential in environmental applications. Here, we report a biomass approach to construct a novel tubular micromotor decorated with a nanozyme/natural enzyme hybrid, which integrated the advantages of the self-propelled movement, selectivity of a natural enzyme and catalytic activity of artificial nanozymes. Such a micromotor had a unique hierarchical structure where laccase immobilized-Fe-BTC MOF nanoparticles grew uniformly on Mn₂O₃–NiFe₂O₄ nanosheets, which was constructed using natural kapok fiber as a template. This laccase-integrated Fe-BTC/NiFe₂O₄ micromotor was capable of self-propulsion with a speed of 120 μm s⁻¹ by oxygen bubbles via the decomposition of H₂O₂ catalyzed by Mn₂O₃. Owing to the incorporation of autonomous motion with high selectivity of natural laccase and high peroxidase-like activity of the Fe-BTC/NiFe₂O₄ nanozyme, these micromotors exhibited much higher catalytic activity to methylene blue degradation than their passive counterparts. Besides as a substrate to accommodate laccase immobilized-Fe-BTC, magnetic NiFe₂O₄ also enabled the remote magnetic control on the movement direction.

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DOI: https://doi.org/10.1039/C9EN01443H
Article type: Paper
Submitted: 19 Dec 2019
Accepted: 12 Jul 2020
First published: 17 Jul 2020

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Environ. Sci.: Nano, 2020,7, 2573-2583

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Micromotor-assisted highly efficient Fenton catalysis by a laccase/Fe-BTC-NiFe₂O₄ nanozyme hybrid with a 3D hierarchical structure

J. Yang, J. Li, D. H. L. Ng, P. Yang, W. Yang and Y. Liu, Environ. Sci.: Nano, 2020, 7, 2573 DOI: 10.1039/C9EN01443H

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Environmental Science: Nano

Micromotor-assisted highly efficient Fenton catalysis by a laccase/Fe-BTC-NiFe₂O₄ nanozyme hybrid with a 3D hierarchical structure†

Abstract

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Micromotor-assisted highly efficient Fenton catalysis by a laccase/Fe-BTC-NiFe₂O₄ nanozyme hybrid with a 3D hierarchical structure

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Environmental Science: Nano