A CeO2@MnO2 core–shell hollow heterojunction as glucose oxidase-like photoenzyme for photoelectrochemical sensing of glucose

Wang, Haiyan; Yang, Weipeng; Wang, Xiaoxia; Huang, Linna; Zhang, Youyu; Yao, Shouzhuo

doi:10.1016/j.snb.2019.127389

Cited by 60 publications

(33 citation statements)

References 33 publications

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“…The photothermal effect and light-induced electron transfer have been demonstrated to be involved with the photoenhanced enzyme-like activity of nanozymes [271][272][273]. With AuNPs and α-FeOOH microcrystals grown on porous carbons, Zhang et al obtained Au/α-FeOOH-FPC catalysts with visible-light-driven enzymatic property [274].…”

Section: External Triggersmentioning

confidence: 99%

A Review on Metal- and Metal Oxide-Based Nanozymes: Properties, Mechanisms, and Applications

et al. 2021

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Since the ferromagnetic (Fe3O4) nanoparticles were firstly reported to exert enzyme-like activity in 2007, extensive research progress in nanozymes has been made with deep investigation of diverse nanozymes and rapid development of related nanotechnologies. As promising alternatives for natural enzymes, nanozymes have broadened the way toward clinical medicine, food safety, environmental monitoring, and chemical production. The past decade has witnessed the rapid development of metal- and metal oxide-based nanozymes owing to their remarkable physicochemical properties in parallel with low cost, high stability, and easy storage. It is widely known that the deep study of catalytic activities and mechanism sheds significant influence on the applications of nanozymes. This review digs into the characteristics and intrinsic properties of metal- and metal oxide-based nanozymes, especially emphasizing their catalytic mechanism and recent applications in biological analysis, relieving inflammation, antibacterial, and cancer therapy. We also conclude the present challenges and provide insights into the future research of nanozymes constituted of metal and metal oxide nanomaterials.

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Section: External Triggersmentioning

confidence: 99%

A Review on Metal- and Metal Oxide-Based Nanozymes: Properties, Mechanisms, and Applications

et al. 2021

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“…The photoinduced processes in metal oxide nanocomposites are still under discussion [ 13 , 30 , 31 , 32 ]. Therefore, the interaction mechanisms and principles of detection in such systems still require additional analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the interaction mechanisms and principles of detection in such systems still require additional analysis. In metal oxide photo-electrochemical glucose sensors, the excitation light results in a significant increase of the photocurrent [ 13 , 30 , 31 , 32 ]. At ZnO, photogenerated charge participates in redox reactions catalyzed by glucose oxidase.…”

Section: Resultsmentioning

confidence: 99%

“…At ZnO, photogenerated charge participates in redox reactions catalyzed by glucose oxidase. The interaction between the sensor surface and target molecules involves conductivity electrons; therefore, the photocurrent after the treatment of glass/ITO/ZnO-PDA/GOx electrode-based sensor with glucose has lower values [ 13 , 30 , 31 , 32 ]. PL quenching in ZnO-PDA nanostructures points to that the formation of organic layer over the ZnO induces additional charge separation and, therefore, enhancement of surface catalytic activity [ 24 , 26 ].…”

Section: Resultsmentioning

confidence: 99%

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Application of Polydopamine Functionalized Zinc Oxide for Glucose Biosensor Design

et al. 2021

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Zinc oxide (ZnO) nanostructures are widely used in optical sensors and biosensors. Functionalization of these nanostructures with polymers enables optical properties of ZnO to be tailored. Polydopamine (PDA) is a highly biocompatible polymer, which can be used as a versatile coating suitable for application in sensor and biosensor design. In this research, we have grown ZnO-based nanorods on the surface of ITO-modified glass-plated optically transparent electrodes (glass/ITO). Then the deposition of the PDA polymer layer on the surface of ZnO nanorods was performed from an aqueous PDA solution in such a way glass/ITO/ZnO-PDA structure was formed. The ZnO-PDA composite was characterized by SEM, TEM, and FTIR spectroscopy. Then glucose oxidase (GOx) was immobilized using crosslinking by glutaraldehyde on the surface of the ZnO-PDA composite, and glass/ITO/ZnO-PDA/GOx-based biosensing structure was designed. This structure was applied for the photo-electrochemical determination of glucose (Glc) in aqueous solutions. Photo-electrochemical determination of glucose by cyclic voltammetry and amperometry has been performed by glass/ITO/ZnO-PDA/GOx-based biosensor. Here reported modification/functionalization of ZnO nanorods with PDA enhances the photo-electrochemical performance of ZnO nanorods, which is well suited for the design of photo-electrochemical sensors and biosensors.

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“…By using TMB substrate onto the test line, the assay exhibited an enhanced sensitivity of 9.0 × 10 2 CFU ml −1 in milk, which was 111-fold higher than that of traditional Au NP-ICA. To get over the shackles of traditional LFA and build a flexible model, increasing studies have been carried out to develop a label-free and low-cost LFA, in which functional nanozymes are widely adopted to replace enzyme labeled antibodies and act as effective recognition agents to generate signals ( Cheng et al, 2017 ; Liu et al, 2018 ; Wang H. et al, 2020 ; Liu, Wang, et al, 2020 ). According to previous reports, the colorimetric assay can become a versatile strategy for rapid detection of a wide variety of other bacteria and pathogens.…”

Section: Application In Food Contaminants Detectionmentioning

confidence: 99%

Nanozyme Applications: A Glimpse of Insight in Food Safety

Zhou

Wang

et al. 2021

Front. Bioeng. Biotechnol.

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Nanozymes own striking merits, including high enzyme-mimicking activity, good stability, and low cost. Due to the powerful and distinguished functions, nanozymes exhibit widespread applications in the field of biosensing and immunoassay, attracting researchers in various fields to design and engineer nanozymes. Recently, nanozymes have been innovatively used to bridge nanotechnology with analytical techniques to achieve the high sensitivity, specificity, and reproducibility. However, the applications of nanozymes in food applications are seldom reviewed. In this review, we summarize several typical nanozymes and provide a comprehensive description of the history, principles, designs, and applications of nanozyme-based analytical techniques in food contaminants detection. Based on engineering and modification of nanozymes, the food contaminants are classified and then discussed in detail via discriminating the roles of nanozymes in various analytical methods, including fluorescence, colorimetric and electrochemical assay, surface-enhanced Raman scattering, magnetic relaxing sensing, and electrochemiluminescence. Further, representative examples of nanozymes-based methods are highlighted for contaminants analysis and inhibition. Finally, the current challenges and prospects of nanozymes are discussed.

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A CeO2@MnO2 core–shell hollow heterojunction as glucose oxidase-like photoenzyme for photoelectrochemical sensing of glucose

Cited by 60 publications

References 33 publications

A Review on Metal- and Metal Oxide-Based Nanozymes: Properties, Mechanisms, and Applications

A Review on Metal- and Metal Oxide-Based Nanozymes: Properties, Mechanisms, and Applications

Application of Polydopamine Functionalized Zinc Oxide for Glucose Biosensor Design

Nanozyme Applications: A Glimpse of Insight in Food Safety

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