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High performance metal oxide based sensing device using an electrode with a solid/liquid/air triphase interface

Nano Research 2017年第9期10卷 2998-3004页

作者： Jun Zhang Xia Sheng Jian Jin Xinjian Feng Lei Jiang College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 China School of Chemistry and Environment Beihang University Beijing 100191 China

The wetting properties of an electrode surface are of significant importance to the performance of electrochemical devices because electron transfer occurs at the electrode/electrolyte interface. Described in this paper is a low-cost metal oxide electrocatalyst (CuO)-based high-performance sensing device using an enzyme electrode with a solid/liquid/air triphase interface in which the oxygen level is constant and sufficiently high. We apply the sensing device to detect glucose, a model test analyte, and demonstrate a linear dynamic range up to 50 mM, which is about 25 times higher than that obtained using a traditional enzyme electrode with a solid/liquid diphase interface. Moreover, we show that sensing devices based on a triphase assaying interface are insensitive to the significant oxygen level fluctuation in the analyte solution.

关键词： superhydrophobicity triphase interface metal oxide electrocatalyst sensing device

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Enhancement of interfacial catalysis in a triphase reactor using oxygen nanocarriers

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Nano Research 2021年第1期14卷 172-176页

作者： Lu Zhou Liping Chen Zhenyao Ding Dandan Wang Hao Xie Weihai Ni Weixiang Ye Xiqi Zhang Lei Jiang Xinjian Feng College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Thin Films School of Physical Science and TechnologySoochow UniversitySuzhou215006China College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhou 215006China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 101407China

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 *** 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 ***,we report an efficient triphase biocatalytic system using oil core-silica shell oxygen *** design offers the biocatalytic system an extremely large water-solid-oil triphase interfacial area and a short path required for oxygen ***,the silica shell stabilizes the oil nanodroplets in water and prevents their *** 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 *** strategy offers the opportunity to enhance the efficiency of other gaseous reactants involved in multiphase catalytic reactions.

关键词： biocatalysis oxidase kinetics triphase interface oil core-silica shell sphere

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triphase photocatalytic water-gas-shift reaction for hydrogen production with enhanced interfacial diffusion at gas-liquid-solid interfaces

Industrial Chemistry & Materials

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Industrial Chemistry & Materials 2024年第3期2卷 432-440页

作者： Huige Chen Zhenhua Li Chao Zhou Run Shi Tierui Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The exothermic characteristic of the water-gas-shift(WGS)reaction,coupled with the thermodynamic constraints at elevated temperatures,has spurred a research inclination towards conducting the WGS reaction at reduced ***,the challenge of achieving efficient mass transfer between gaseous CO and liquid H_(2)O at the photocatalytic interface under mild reaction conditions hinders the advancement of the photocatalytic WGS *** this study,we introduce a gas-liquid-solid triphase photocatalytic WGS reaction *** system facilitates swift transportation of gaseous CO to the photocatalyst's surface while ensuring a consistent water *** various metal-loaded TiO_(2) photocatalysts,Rh/TiO_(2) nanoparticles positioned at the triphase interface demonstrated an impressive H_(2) production rate of 27.60 mmol g^(-1) h^(-1).This rate is roughly 2 and 10 times greater than that observed in the liquid-solid and gas-solid diphase ***,finite element simulations indicate that the concentrations of CO and H_(2)O at the gas-liquid-solid interface remain *** suggests that the triphase interface establishes a conducive microenvironment with sufficient CO and H_(2)O supply to the surface of *** insights offer a foundational approach to enhance the interfacial mass transfer of gaseous CO and liquid H_(2)O,thereby optimizing the photocatalytic WGS reaction's efficiency.

关键词： Water-gas-shift Photocatalysis triphase interface Hydrogen evolution TiO_(2)

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High-Performance Photocathodic Bioanalysis Based on Core-Shell Structured Cu_(2)O@TiO_(2) Nanowire Arrays with Air–Liquid–Solid Joint interfaces

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CCS Chemistry 2022年第3期4卷 1044-1053页

作者： Zhaohong Wang Liping Chen Dandan Wang Zhenyao Ding Xiqi Zhang Xinjian Feng Lei Jiang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123 Key Laboratory of Bio-Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 School of Future Technology University of Chinese Academy of SciencesBeijing 101407

Developing photoelectrochemical(PEC)bioassays based on the principle of a photocathodic measurement of enzymatic product H_(2)O_(2) is highly attractive because it can naturally avoid interfering signals arising from reductive species inherent to ***,fluctuant oxygen levels in the analyte solution can compromise the accuracy of photocathodic bioanalysis and restrict its application because oxygen reduction potential is similar to H_(2)O_(2).Herein,we addressed this restriction by constructing a triphase biophotocathode with air–liquid–solid joint interfaces by immobilizing an oxidase enzyme film on the tip part of superhydrophobic p-type semiconductor nanowire *** a triphase biophotocathode has a reaction zone with steady and air phasedependent oxygen concentration which stabilizes and increases the oxidase kinetics,and enables the photocathodic measurement principle in reliable PEC bioassay development with high selectivity,good accuracy,and a wide linear detection ***,the biophotocathode shows good stability during repeated testing under light *** reliable PEC bioassay system has broad potential in the fields of disease diagnosis,medical research,and environmental monitoring.

关键词： superhydrophobicity triphase interface photocathode photoelectrochemical bioanalysis

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