Volume 64, Issue 28 e202505797
Research Article

Covalent Organic Framework Nanosheets for the Assembly of Efficient Membrane Bioreactors

Jingxu Han

Jingxu Han

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018 China

Both authors contributed equally to this work.

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Zhiwei Xing

Zhiwei Xing

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Both authors contributed equally to this work.

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Qing Guo

Qing Guo

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Di Wu

Di Wu

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Zhuozhi Lai

Zhuozhi Lai

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Xiaoxiao Cheng

Xiaoxiao Cheng

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Prof. Zhifeng Dai

Corresponding Author

Prof. Zhifeng Dai

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018 China

E-mail: [email protected]; [email protected]

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Prof. Yubing Xiong

Prof. Yubing Xiong

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018 China

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Xiangju Meng

Xiangju Meng

Department of Chemistry, Zhejiang University, Hangzhou, 310027 China

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Prof. Shengqian Ma

Prof. Shengqian Ma

Department of Chemistry, University of North Texas, 1508 W Mulberry St, Denton TX, 76201 USA

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Prof. Feng-Shou Xiao

Prof. Feng-Shou Xiao

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Prof. Qi Sun

Corresponding Author

Prof. Qi Sun

Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

E-mail: [email protected]; [email protected]

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First published: 30 April 2025

Graphical Abstract

We present a layer-by-layer assembly method to trap enzymes between covalent organic framework (COF) nanosheets instead for the construction of membrane bioreactors. This design boosts mass transfer, shields enzymes from harmful by-products, and enables rapid substrate conversion (complete in 7.95 s)—achieving 1018× higher activity than free enzymes. The reactor maintains stability under continuous use and works with diverse enzymes/COFs, offering a versatile platform for high-performance biocatalysts.

Abstract

Immobilizing fragile enzymes in porous materials holds significant potential for biocatalysis but encounters challenges such as mismatched enzyme size and pore structure of host materials, along with harsh assembly conditions that can denature enzymes. Herein, we present a versatile strategy for constructing membrane bioreactors through water-mediated, vacuum-assisted layer-by-layer assembly of covalent organic framework (COF) nanosheets with enzymes. This method effectively addresses pore size limitations, preserves enzyme activity, and promotes convective transport of reactants to active sites, while shielding enzymes from harmful by-products through rapid transport in continuous membrane catalysis. The optimized bioreactor achieves a 1018-fold increase in relative activity compared to free enzymes in batch reactions, completing substrate conversion in just 7.95 s, and demonstrating enhanced stability.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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