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Multiphase catalysis is used in many industrial processes; however, the reaction rate can be restricted by the low accessibility of gaseous reactants to the catalysts in water, especially for oxygen-dependent biocatalytic reactions. Despite the fact that solubility and diffusion rates of oxygen in many liquids (such as perfluorocarbon) are much higher than in water, multiphase reactions with a second liquid phase are still difficult to conduct, because the interaction efficiency between immiscible phases is extremely low. Herein, we report an efficient triphase biocatalytic system using oil core-silica shell oxygen nanocarriers. Such design offers the biocatalytic system an extremely large water-solid-oil triphase interfacial area and a short path required for oxygen diffusion. Moreover, the silica shell stabilizes the oil nanodroplets in water and prevents their aggregation. Using oxygen-dependent oxidase enzymatic reaction as an example, we demonstrate this efficient biocatalytic system for the oxidation of glucose, choline, lactate, and sucrose by substituting their corresponding oxidase counterparts. A rate enhancement by a factor of 10-30 is observed when the oxygen nanocarriers are introduced into reaction system. This strategy offers the opportunity to enhance the efficiency of other gaseous reactants involved in multiphase catalytic reactions.


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Enhancement of interfacial catalysis in a triphase reactor using oxygen nanocarriers

Show Author's information Lu Zhou1,§Liping Chen1,§Zhenyao Ding1Dandan Wang1Hao Xie2Weihai Ni2Weixiang Ye2Xiqi Zhang3Lei Jiang4,5( )Xinjian Feng1( )
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, 215006, China
College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China
Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
School of Future Technology, University of Chinese Academy of Sciences, Beijing 101407, China

§ Lu Zhou and Liping Chen contributed equally to this work.

Abstract

Multiphase catalysis is used in many industrial processes; however, the reaction rate can be restricted by the low accessibility of gaseous reactants to the catalysts in water, especially for oxygen-dependent biocatalytic reactions. Despite the fact that solubility and diffusion rates of oxygen in many liquids (such as perfluorocarbon) are much higher than in water, multiphase reactions with a second liquid phase are still difficult to conduct, because the interaction efficiency between immiscible phases is extremely low. Herein, we report an efficient triphase biocatalytic system using oil core-silica shell oxygen nanocarriers. Such design offers the biocatalytic system an extremely large water-solid-oil triphase interfacial area and a short path required for oxygen diffusion. Moreover, the silica shell stabilizes the oil nanodroplets in water and prevents their aggregation. Using oxygen-dependent oxidase enzymatic reaction as an example, we demonstrate this efficient biocatalytic system for the oxidation of glucose, choline, lactate, and sucrose by substituting their corresponding oxidase counterparts. A rate enhancement by a factor of 10-30 is observed when the oxygen nanocarriers are introduced into reaction system. This strategy offers the opportunity to enhance the efficiency of other gaseous reactants involved in multiphase catalytic reactions.

Keywords: biocatalysis, oxidase kinetics, triphase interface, oil core-silica shell sphere

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Publication history
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Acknowledgements

Publication history

Received: 03 August 2020
Revised: 19 August 2020
Accepted: 20 August 2020
Published: 05 January 2021
Issue date: January 2021

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature

Acknowledgements

This research was financially supported by the National Key R&D Program of China (No. 2019YFA0709200) and the National Natural Science Foundation of China (Nos. 21988102, 51772198, and 21975171).

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