Enhanced peroxidase-like activity of CuWO4 nanoparticles for the detection of NADH and hydrogen peroxide

Aneesh, K.; Vusa, Chiranjeevi Srinivasa Rao; Berchmans, Sheela

doi:10.1016/j.snb.2017.06.175

Cited by 60 publications

(4 citation statements)

References 72 publications

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“…One such enzyme that belongs to the ferroprotoporphyrin group of peroxidases is horseradish peroxidase (HRP). It is characterized by its high sensitivity, rapid analysis, and low background interferences . However, the natural HRP enzyme is highly vulnerable to harsh environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…These materials are expected to possess high stability, reusability, ease of storage and handling, and simple synthesis procedures. These peroxidase mimics can be used for the sensing of various analytes like H 2 O 2 , glucose, cholesterol, cysteine, melamine, protein, dopamine, urea, leukemia cancer cells, and so on …”

Section: Introductionmentioning

confidence: 99%

“…It is characterized by its high sensitivity, rapid analysis, and low background interferences. 7 However, the natural HRP enzyme is highly vulnerable to harsh environmental conditions. Also, it is expensive, and the procedures used for the preparation and purification are complicated, which limits its wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

“…These peroxidase mimics can be used for the sensing of various analytes like H 2 O 2 , glucose, cholesterol, cysteine, melamine, protein, dopamine, urea, leukemia cancer cells, and so on. 7 …”

Section: Introductionmentioning

confidence: 99%

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Bimetallic Cu–Zn Zeolitic Imidazolate Frameworks as Peroxidase Mimics for the Detection of Hydrogen Peroxide: Electrochemical and Spectrophotometric Evaluation

Mechoor,

Berchmans,

Venkatachalam

2023

ACS Omega

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A copper incorporated zeolitic imidazolate framework-8 (ZIF-8) has been synthesized and demonstrated to be a potential material for a peroxidase mimic. The resultant bimetallic Cu−Zn incorporated MOF is used for the dual mode sensing of hydrogen peroxide by following electrochemical as well as spectrophotometric methods. Using 3,3′,5,5′-tetramethylbenzidine (TMB) as a chromogenic substrate, spectrophotometric studies are carried out, and the steady state kinetic parameters are determined for two different concentrations of Cu incorporated ZIF-8

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bimetallic Cu–Zn Zeolitic Imidazolate Frameworks as Peroxidase Mimics for the Detection of Hydrogen Peroxide: Electrochemical and Spectrophotometric Evaluation

Mechoor,

Berchmans,

Venkatachalam

2023

ACS Omega

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Molten Salts Derived Copper Tungstate Nanoparticles as Bifunctional Electro‐Catalysts for Electrolysis of Water and Supercapacitor Applications

et al. 2018

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Herein, we report molten salts derived, cube‐shaped CuWO4 nanoparticles (50±5 nm) as multi‐functional catalysts in electrochemical and photo‐electrochemical studies. The formation of pure phase cube‐shaped CuWO4 nanoparticles (CWO‐NPs) is analyzed by X‐ray diffraction, Raman spectroscopy, X‐ray photo‐electron spectroscopy (XPS) and field‐emission electron microscopy (FE‐SEM and FE‐TEM). CWO‐NPs show remarkable bi‐functional electro‐catalytic behavior for the oxygen evolution (OER) and oxygen reduction reactions (ORR) in 1.0 M KOH electrolyte solution. Polarization studies of CWO‐NPs exhibit low over‐potential (∼260 mV) at 1 mA/cm2 and low Tafel slope value (∼190 mV/dec) for OER compared to bulk or other oxides. Polarization studies with controlled electrode rotation reveal a four‐electron pathway for the water electrolysis reaction for OER/ORR. In addition, CWO‐NPs show promising capacitive behavior with specific capacitance values of ∼230 F/g using 1 M KOH electrolyte. Galvanostatic charge‐discharge (GCD) studies of CWO‐NPs displays low energy loss during discharge time for 50 segments. To further investigate the potential for industrial applications, the stability of the electrodes is also examined using chrono‐amperometry (CA) at fixed potential, chrono‐potentiometry (CP) at fixed current density, and cyclic voltammetry (CV) with 50 cycles.

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DiZyme: Open‐Access Expandable Resource for Quantitative Prediction of Nanozyme Catalytic Activity

Razlivina

Serov

Shapovalova

et al. 2022

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Enzymes suffer from high cost, complex purification, and low stability. Development of low‐cost artificial enzymes of comparative or higher effectiveness is desired. Given its complexity, it is desired to presume their activities prior to experiments. While computational approaches demonstrate success in modeling nanozyme activities, they require assumptions about the system to be made. Machine learning (ML) is an alternative approach towards data‐driven material property prediction achieving high performance even on multicomponent complex systems. Despite the growing demand for customized nanozymes, there is no open access nanozyme database. Here, a user‐friendly expandable database of >300 existing inorganic nanozymes is developed by data collection from >100 articles. Data analysis is performed to reveal the features responsible for catalytic activities of nanozymes, and new descriptors are proposed for its ML‐assisted prediction. A random forest regression (RFR) model for evaluation of nanozyme peroxidase activity is developed and optimized by correlation‐based feature selection and hyperparameter tuning, achieving performance up to R2 = 0.796 for Kcat and R2 = 0.627 for Km. Experiment‐confirmed unknown nanozyme activity prediction is also demonstrated. Moreover, the DiZyme expandable, open‐access resource containing the database, predictive algorithm, and visualization tool is developed to boost novel nanozyme discovery worldwide (https://dizyme.net).

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Enhanced peroxidase-like activity of CuWO4 nanoparticles for the detection of NADH and hydrogen peroxide

Cited by 60 publications

References 72 publications

Bimetallic Cu–Zn Zeolitic Imidazolate Frameworks as Peroxidase Mimics for the Detection of Hydrogen Peroxide: Electrochemical and Spectrophotometric Evaluation

Bimetallic Cu–Zn Zeolitic Imidazolate Frameworks as Peroxidase Mimics for the Detection of Hydrogen Peroxide: Electrochemical and Spectrophotometric Evaluation

Molten Salts Derived Copper Tungstate Nanoparticles as Bifunctional Electro‐Catalysts for Electrolysis of Water and Supercapacitor Applications

DiZyme: Open‐Access Expandable Resource for Quantitative Prediction of Nanozyme Catalytic Activity

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