Bioelectrocatalysis and surface analysis of gold coated with nickel oxide/hydroxide and glucose oxidase towards detection of glucose

Njoko, Nqobile; Louzada, Marcel; Britton, Jonathan; Khene, Samson; Nyokong, Tebello; Mashazi, Philani

doi:10.1016/j.colsurfb.2020.110981

Cited by 18 publications

(5 citation statements)

References 36 publications

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“…The mixture is then subjected to ball milling in a ball mill jar. During the ball milling process, the morphology of primary nickel hydroxide with a diameter exceeding 10 μm is disrupted; nickel hydroxide after fragmentation exhibits irregular secondary particles with particle aggregation in the diameter range of 3 to 5 μm (Figure S1a,b), while glucose, serving as the carbon source, encapsulates the nickel hydroxide. − After completion of the ball milling, the slurry in the jar is transferred to a beaker and subjected to freeze-drying until the moisture is sublimated, resulting in a fluffy precursor powder.…”

Section: Resultsmentioning

confidence: 99%

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Ma,

He,

et al. 2024

ACS Appl. Energy Mater.

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Aqueous hydrogen gas (H 2 ) batteries with high safety and proven long lifespan have shown attractive prospects for large-scale energy storage. However, the development of low-cost and relatively high activity nonprecious metal catalysts for the hydrogen oxidation reaction (HOR) for a hydrogen electrode is the key to solving its cost bottleneck. Here, We have achieved a low-cost and highly active nanonickel hydroxide catalyst through a simple ball-milling method combined with carbon−nitrogen comodification. The experiments indicate that in the presence of carbon modification, nitrogen interacts with carbon to suppress the formation of Ni 3 N, while trace nitrogen modification on nickel significantly enhances hydroxide activity. The optimized N−Ni/C-4 catalyst exhibits intrinsic activity 11.36 times that of Ni/Ni 3 N (without C modification) and 17.85 times that of commercial Raney-Ni. Moreover, based on this N−Ni/C-4 catalytic electrode, superior rate performance is demonstrated in an aqueous nickel−hydrogen gas cell compared to commercial Raney-Ni, achieving 300 cycles/1000 h of charge/discharge at 30 mA cm −2 , with no decline in Coulombic efficiency. This 900 mAh N−Ni/C-4-based Ni−H 2 cell achieves an energy density of 165 Wh kg −1 and is currently reported to be one of the lowest-cost nickel−hydrogen cell. This low-cost, highly active nanonickel catalyst demonstrates significant potential in the conversion and application of hydrogen energy.

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Section: Resultsmentioning

confidence: 99%

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Ma,

He,

et al. 2024

ACS Appl. Energy Mater.

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“…A combination of metal and metal oxide nanomaterials was employed to ensure the accurate orientation of journal.ump.edu.my/cst ◄ Gox during glucose sensing. The biosensor was fabricated by coating of Au electrode using NiO/Ni(OH)2 and subsequent immobilization of the GOx [65]. Yoon et al modified a polymer electrode by double sputter coating of gold and single spin coating of MOS2 for glucose sensing.…”

Section: Nanomaterials In Glucose Oxidase Based Biosensormentioning

confidence: 99%

Applications of Nanomaterials for Biosensor Fabrication Based on Redox Enzyme and Protein: A Short Review

Azmi,

Kader,

AKM

2023

cst

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Redox enzyme and protein modified biosensors are commercially triumphant bioelectronic devices used in the point-of-care analysis. The use of nanotechnology derived nanomaterials during enzyme immobilization creates a synergistic effect by integrating enzyme’s recognition and catalytic properties with the electronic properties of nanomaterials. This synergy improves the biosensor’s sensitivity, conductivity stability, surface-to-volume ratio, selectivity, detection limit and other analytical features. This critical review focuses on the redox enzymes and proteins most frequently used in glucose and hydrogen peroxide sensing, such as horseradish peroxidase (HRP), glucose oxidase (GOx), hemoglobin (HB), and cytochrome C (Cyt c). Besides, we evaluate the state of art of this approach, selection of nanomaterials, preparation and immobilization mechanisms, their role and sensing applications. Besides advantages, the discussions have discussed on the pressing challenges of developing these sensors. This review will guide the research community to develop rational and highly efficient nanomaterial immobilized biosensors.

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“…In contrast to single-signal detection, this method has built-in corrections for fluctuations in instrument operation, interference from the sample matrix, variations in the microenvironment around the probe, and changes in the concentration of the probe. Due to these advantages, a ratiometric strategy is extensively implemented in a wide range of analytical techniques, including fluorescence, Raman, absorbance, electrochemistry, and mass spectrometry (Ali et al, 2014;Ke et al, 2015;Li et al, 2015;Peng et al, 2016;Chen et al, 2017;Parrilla et al, 2017;Vargas et al, 2019;Vyas et al, 2019;Njoko et al, 2020;Madhu and Tseng, 2021;Spring et al, 2021;Zhu et al, 2021). Two or more fluorescent dyes and nanomaterials are typically integrated into a ratiometric fluorescence sensing analytical platform.…”

Section: Introductionmentioning

confidence: 99%

Maximizing analytical precision: exploring the advantages of ratiometric strategy in fluorescence, Raman, electrochemical, and mass spectrometry detection

Madhu,

Santhoshkumar,

Tseng

et al. 2023

Front. Anal. Sci.

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Ratiometric strategy are an invaluable method that helps to detect and quantify analytes. This approach relies on measuring changes in the ratio of two or more signals to improve the accuracy and sensitivity of the results. Ratiometric strategies are widely used in a variety of fields including biomedical, environmental monitoring and food safety. It is particularly popular when traditional single-signal based detection methods are not feasible, especially when interfering substances severely affect the detection. In addition, ratiometric methods have the potential to improve the accuracy and reliability of analyte detection, leading to better results in a variety of complex environments. The article provides a comprehensive review of ratiometric strategy, focusing on ratiometric fluorescent nanoprobes for the visual detection of analytes. This paper also discusses the design of ratiometric two-photon fluorescent probes for biomedical imaging, the synthesis of ratiometric surface-enhanced Raman scattering nanoprobes for the imaging of intracellular analytes, the development of ratiometric molecularly imprinted electrochemical sensors for detection of electroactive species, and the use of isotopically-labeled internal standards in matrix-assisted laser desorption/ionization for ratiometric analysis. The article not only discusses each technique in detail, including its principles, advantages, potential applications, and limitations, but also highlights recent advances in each method and possible future directions.

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Bioelectrocatalysis and surface analysis of gold coated with nickel oxide/hydroxide and glucose oxidase towards detection of glucose

Cited by 18 publications

References 36 publications

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Applications of Nanomaterials for Biosensor Fabrication Based on Redox Enzyme and Protein: A Short Review

Maximizing analytical precision: exploring the advantages of ratiometric strategy in fluorescence, Raman, electrochemical, and mass spectrometry detection

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Bioelectrocatalysis and surface analysis of gold coated with nickel oxide/hydroxide and glucose oxidase towards detection of glucose

Cited by 18 publications

References 36 publications

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H2 Gas Battery

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H2 Gas Battery

Applications of Nanomaterials for Biosensor Fabrication Based on Redox Enzyme and Protein: A Short Review

Maximizing analytical precision: exploring the advantages of ratiometric strategy in fluorescence, Raman, electrochemical, and mass spectrometry detection

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Product

Resources

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Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery