Simultaneous Determination of Epinephrine and Tyrosine Using a Glassy Carbon Electrode Amplified with ZnO-Pt/CNTs Nanocomposite

Samadzadeh, Ali; Sheikhshoaie, Iran; Karimi-Maleh, Hassan

doi:10.2174/1573411014666180313115001

Cited by 20 publications

(4 citation statements)

References 52 publications

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“…Nevertheless, with the exception of PMaIG/MWCNT/GCE, the sensitivities reported here are higher, which represents an advantageous feature. The lowest limits of detection displayed in Table were achieved for sensors constructed with either nanocomposites or other compounds with less appealing characteristics, both in practical and economic terms. Furthermore, they do not fulfill the main requirements for modified electrode sensors, which are high performance, robustness, low cost and easy preparation.…”

Section: Resultsmentioning

confidence: 99%

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Tomé

Brett

2019

Electroanalysis

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Novel electrochemical sensors for epinephrine (EP) based on a glassy carbon electrode (GCE) modified with a redox polymer film and iron (III) oxide nanoparticles (Fe2O3NP) have been developed. Two redox polymers‐poly(brilliant cresyl blue) (PBCB) and poly(Nile blue) (PNB), and two different architectures‐polymer/Fe2O3/GCE and Fe2O3/polymer/GCE were investigated. The electrochemical oxidation of epinephrine at the modified electrodes was performed by differential pulse voltammetry (DPV), in pH 7 electrolyte, and the analytical parameters were determined. The results show enhanced performance, more sensitive responses and lower detection limits at the modified electrodes, compared to other electrochemical epinephrine sensors reported in the literature. The best voltammetric response with the lowest detection limit was obtained for the determination of epinephrine at PBCB/Fe2O3/GCE. The novel sensors are reusable, with good reproducibility and stability, and were successfully applied to the determination of epinephrine in commercial injectable adrenaline samples.

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Section: Resultsmentioning

confidence: 99%

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Tomé

Brett

2019

Electroanalysis

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“…The electrons can easily move from the conduction band of zinc oxide to CNTs due to their low work function. CNTs accept electrons to enhance the separation of photoinduced electron–hole pairs, leading to a high H 2 evolution rate . The excellent conductivity of CNTs, which improves H 2 production activity, accelerates the movement of charges to the plane of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

“…CNTs accept electrons to enhance the separation of photoinduced electron–hole pairs, leading to a high H 2 evolution rate. 9 The excellent conductivity of CNTs, which improves H 2 production activity, accelerates the movement of charges to the plane of the catalyst. Hence, CNTs work as a transporter and an e – sink in the photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Testing of Sr-Doped ZnO/CNT Photocatalysts for Hydrogen Evolution from Water Splitting under Atmospheric Dielectric Barrier Plasma Exposure

et al. 2023

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Nonthermal plasma is a well-recognized environmentally advantageous method for producing green fuels. This work used different photocatalysts, including PZO, S x ZO, and S x ZC x for hydrogen production using an atmospheric argon coaxial dielectric barrier discharge (DBD)-based light source. The photocatalysts were produced using a sol–gel route. The DBD discharge column was filled with water, methanol, and the catalyst to run the reaction under argon plasma. The DBD reactor was operated with a 10 kV AC source to sustain plasma for water splitting. The light absorption study of the tested catalysts revealed a decrease in the band gap with an increase in the concentration of Sr and carbon nanotubes (CNTs) in the Sr/ZnO/CNTs series. The photocatalyst S25ZC2 demonstrated the lowest photoluminescence (PL) intensity, implying the most quenched recombination of charge carriers. The highest H2 evolution rate of 2760 μmol h–1 g–1 was possible with the S25ZC2 catalyst, and the lowest evolution rate of 56 μmol h–1 g–1 was observed with the PZO catalyst. The photocatalytic activity of S25ZC2 was initially high, which decreased slightly over time due to the deactivation of the photocatalyst. The photocatalytic activity decreased from 2760 to 1670 μmol h–1 g–1 at the end of the process.

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“…Among different analytical detection techniques, the electrochemical system exhibited the advantages of high signaling amplification, easy fabrication, simple operation, low cost, and rapid detection. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] It has been reported that due to sluggish electrode kinetics and high overpotential, the conventional electrodes provided negligible response toward electrochemical oxidation of AD. 3,6 Furthermore, in physiological samples AD usually coexist with other biomolecules such as dopamine (DA), ascorbic acid (AA), and Uric acid (UA).…”

mentioning

confidence: 99%

Nitrogen-Doped Graphene Supported α-Co(OH)₂ for Sensitive Determination of Adrenaline

Mohiuddin

Jeon²

2022

ECS Adv.

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For a happy and healthy life, there should have a balance of flight-to-flight hormones, i.e, adrenaline (AD). The necessity of determination of AD is inevitable for the diagnosis of associated diseases with it. For this purpose, N-doped graphene supported α-Co(OH)2 (denoted as NrGO/α-Co(OH)2) was synthesized via a hydrothermal process, where α-Co(OH)2 acted as an active site and NrGO provided a better defective surface for immobilized α-Co(OH)2 nanoparticles. The as-prepared nanocomposite altered the electronic configuration due to its defective nature, which played an important role to increase the stability, surface area and electron transfer capability. As a result, NrGO/α-Co(OH)2 demonstrated remarkable analytical performances toward AD with a lower limit of detection (14.7nM), wide linear range (0.5-800µM), and good sensitivity (115.983 µA mM−1 cm-2). The CA response time was obtained as 2.2 s. The proposed sensor showed precious selectivity during AD detection in presence of coexisting biomolecules such as DA, AA, UA, TY, 5-HT, and NE, and 50-fold excess of common ions such as Na+, K+, Ca2+, Mn2+, Fe2+, CO32-, and SO42-. Furthermore, it also provided long-term stability, good reproducibility and repeatability with practical feasibility in the urine sample. Importantly, the effect of pH was studied in detail on AD oxidation.

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Simultaneous Determination of Epinephrine and Tyrosine Using a Glassy Carbon Electrode Amplified with ZnO-Pt/CNTs Nanocomposite

Cited by 20 publications

References 52 publications

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Testing of Sr-Doped ZnO/CNT Photocatalysts for Hydrogen Evolution from Water Splitting under Atmospheric Dielectric Barrier Plasma Exposure

Nitrogen-Doped Graphene Supported α-Co(OH)₂ for Sensitive Determination of Adrenaline

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Simultaneous Determination of Epinephrine and Tyrosine Using a Glassy Carbon Electrode Amplified with ZnO-Pt/CNTs Nanocomposite

Cited by 20 publications

References 52 publications

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Polymer/Iron Oxide Nanoparticle Modified Glassy Carbon Electrodes for the Enhanced Detection of Epinephrine

Testing of Sr-Doped ZnO/CNT Photocatalysts for Hydrogen Evolution from Water Splitting under Atmospheric Dielectric Barrier Plasma Exposure

Nitrogen-Doped Graphene Supported α-Co(OH)2 for Sensitive Determination of Adrenaline

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Product

Resources

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Nitrogen-Doped Graphene Supported α-Co(OH)₂ for Sensitive Determination of Adrenaline