Covalent Bonded Graphene/Neutral Red Nanocomposite Prepared by One‐step Electrochemical Method and its Electrocatalytic Properties Toward Uric Acid

Liu, Chang; Xu, Zhikun; Liu, Ling

doi:10.1002/elan.201700817

Cited by 8 publications

(4 citation statements)

References 37 publications

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“…2c) exhibited four peaks at 398.9 (N-H groups), 399.6 (pyyrolic N present in ring), 400.4 (imine groups of =N + Me 2 ) and 401.7 eV (ring protonated amine) respectively. 24,44,45 Figures 2d -2e shows the microscopic analysis of bare GCE and polymerized NR carried out using SEM analysis. From the analysis, we observed intertwined fractal pattern of PNR, which clearly indicates the polymerization of NR occurred on the GCE within the potential range.…”

Section: Resultsmentioning

confidence: 99%

Ion-Pair Facilitated Non-Enzymatic Electrochemical Sensing of Cadaverine and Putrescine

Kumar

Arockiaraj

Esokkiya

et al. 2021

J. Electrochem. Soc.

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Cadaverine and putrescine are well known biogenic amines for food spoilage, their presence along with histamine increases the food toxicity to manifold and rapid detection of these analytes remains challenging. To address these problems, poly(neutral red) (PNR) based electrochemical sensor for sensing of cadaverine and putrescine has been developed. Neutral red (NR) polymerised over glassy carbon electrode (GCE) has been utilized for sensing of biogenic amines. Positively charged groups on PNR/GCE surface forms ion-pair complex with putrescine or cadaverine via diphosphate ion bridging which facilitates the sensing ability and the formation of ion-pair, as evidenced by DFT calculations. PNR/GCE exhibited detection ability in the range of 0.025 to 414 μM with a limit of detection of 0.22 μM and 0.25 μM for cadaverine and putrescine, respectively. The developed non-enzymatic electrochemical sensor for cadaverine and putrescine exhibited good anti-interference ability towards common ions and amino acids were studied. Demonstrated non-enzymatic electrochemical sensor method is simple and convenient for tracing biogenic amines in real samples like spoilage in fish specimen.

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Section: Resultsmentioning

confidence: 99%

Ion-Pair Facilitated Non-Enzymatic Electrochemical Sensing of Cadaverine and Putrescine

Kumar

Arockiaraj

Esokkiya

et al. 2021

J. Electrochem. Soc.

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“…For example, in a phosphate buffer solution at pH 7.0, the oxidation potential of uric acid is 435 mV at a bare carbon paste electrode 71 and approximately 395 mV at a bare glassy carbon electrode (scan rate: 50 mV s −1 ). 72 With electrode modification, the oxidation potential of uric acid can be reduced to 352 mV. 71 When uric acid (0.25 mM), ascorbic acid (2.5 mM), and dopamine (0.05 mM) are present simultaneously in a buffer solution (pH 7.0), the oxidation peaks of uric acid, dopamine, and ascorbic acid are 451 mV, 68.5 mV, and 265 mV at this modified electrode.…”

Section: The Principle Of Electrochemical Sensors For Detecting Uric ...mentioning

confidence: 97%

Electrochemical Uric Acid Sensors: Fundamentals and Commercial Status

Liu¹,

Lv²,

Yang³

et al. 2022

J. Electrochem. Soc.

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An abnormal level of uric acid could lead to serious diseases and complications, such as gout, as well as renal and cardiovascular diseases. Uric acid biosensors have been developed widely for clinical applications. This work covers the fundamentals and challenges for the development of such sensors. The topics include the sensing principles for detecting uric acid, the types of sensing signals and signal generation methods, the sensing electrode materials and configurations, the enzymatic and non-enzymatic uric acid sensors, the electrochemiluminescence sensors, the modification approaches for the sensing electrodes, and the commercial status of the various types of sensors. This review explores the fundamentals and practical applications of uric acid biosensors, addresses the current progress and future challenges, and would serve as a resource for the development of uric acid biosensors.

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“…Due to their high sensitivity, simplicity, speed, affordability, and lack of need for sample preparation, electrochemical techniques have been highly regarded today 13 – 15 . They have been reported to determine tyrosine and uric acid 16 – 18 . The yellow color of gold is due to the reflection of blue light at the end of the spectrum, but the size of the particles becomes smaller than the wavelength of the reflection as the size of the particles decreases.…”

Section: Introductionmentioning

confidence: 99%

Decorated graphene oxide with gold nanoparticles as a sensitive modified carbon paste electrode for simultaneous determination of tyrosine and uric acid

Garazhian,

Kalate Bojdi,

Behbahani

2023

Sci Rep

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It is presented here as a simple, selective, rapid, low-cost, with a wide linear range method to simultaneously determine tyrosine and uric acid using a modified carbon paste electrode decorated with graphene oxide and gold nanoparticles (GO/AuNPs/MCPE). In order to characterize and evaluate the morphology and constituents of the nanostructures, X-ray diffraction spectroscopy, Transmission electron microscopes, Dynamic light scattering, Zeta potential, electrochemical impedance spectroscopy, and Voltammetry were employed. The current response on the surface of the modified electrode had a dynamic linear range relationship in the concentrations of 0.14–340.00 µmol L−1 and 0.06–141.00 µmol L−1 for tyrosine and uric acid, respectively, and the method detection limit (MDL) was 0.0060 µmol L−1 and 0.0037 µmol L−1, respectively. This modified electrode provided high stability, sensitivity, and acceptable reproducibility for voltammetric measurements of tyrosine and uric acid simultaneously in a biological matrix.

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Covalent Bonded Graphene/Neutral Red Nanocomposite Prepared by One‐step Electrochemical Method and its Electrocatalytic Properties Toward Uric Acid

Cited by 8 publications

References 37 publications

Ion-Pair Facilitated Non-Enzymatic Electrochemical Sensing of Cadaverine and Putrescine

Ion-Pair Facilitated Non-Enzymatic Electrochemical Sensing of Cadaverine and Putrescine

Electrochemical Uric Acid Sensors: Fundamentals and Commercial Status

Decorated graphene oxide with gold nanoparticles as a sensitive modified carbon paste electrode for simultaneous determination of tyrosine and uric acid

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