Utilization of a MnO2/polythiophene/rGO nanocomposite modified glassy carbon electrode as an electrochemical sensor for methyl parathion

Ramachandran, Tholkappiyan; Dhayabaran, V. Violet

doi:10.1007/s10854-019-01590-9

Cited by 25 publications

(7 citation statements)

References 49 publications

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“…Significant peaks were obtained denoting C = C (quinoid ring, 1340 cm −1 ), symmetric C = C (1440 cm −1 ), and asymmetric C = C (1730 cm −1 ) ring stretching. 42 Broadbands obtained in the range of 3612-3744 cm −1 were attributed to water molecules adsorbed by PTH, and the peak which appeared at 3300 cm −1 may have been related to the symmetric C-H aromatic stretching band. 43 The weak beak observed at 2299 cm −1 was attributed to S-H stretching.…”

Section: Resultsmentioning

confidence: 94%

Electroanalysis of Ascorbic Acid in Fresh Orange Juice Using a PTH/MWCNTCOOH-RGO/CS/CuO Film Modified Carbon Paste Electrode

AL-Refai¹,

Ganash²,

Hussein³

2021

J. Electrochem. Soc.

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The incorporation, characterization, and analytical ability of an ascorbic acid (AA) voltammetric sensor, based on the PTH/MWCNTCOOH-RGO/CS/CuO modified carbon paste electrode (CPE), were studied. The nanocomposite was prepared via an in situ chemical polymerization route. The structural characterization, surface morphology, and thermal analysis of the modified polymers were confirmed. The kinetics and mechanism of the oxidation process of AA on the modified electrode were studied via scan rate analysis. The quantitative detection of AA was achieved effectually by a square wave voltammetry (SWV) technique. The proposed voltammetric sensor exhibited high performance in 0.1 M phosphate-buffered solution (PBS) at pH 3. In the pH range 3 to 7 AA undergoes irreversible oxidation via transfer of 2H+/2e-. The proposed sensor showed a wide linear range (5 µM to 2 mM) and a low detection limit (0.613 µM). Additionally, the reproducibility and stability (at the 1 mM level) expressed in terms of relative standard deviation (RSD) was 2.13% and 1.98% respectively. The practicality of the proposed sensor was confirmed by the successful detection of ascorbic acid in fresh orange juice and the recovery was between 107.9% and 92.63%, with excellent accuracy.

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Section: Resultsmentioning

confidence: 94%

Electroanalysis of Ascorbic Acid in Fresh Orange Juice Using a PTH/MWCNTCOOH-RGO/CS/CuO Film Modified Carbon Paste Electrode

AL-Refai¹,

Ganash²,

Hussein³

2021

J. Electrochem. Soc.

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“…The limit of detection was found to be as low as 2.5 nmol L −1 (S/N=3). The revision of the recently published papers revealed, that the detection limit for methyl parathion determination reached applying electrochemical sensors varies over a large range: from 0.05 nmol L −1 to 53 nmol L −1 (Table 1) [8–20]. The European Council Directive 98/83/EC on the quality of water intended for human consumption (Council Directive 98/83/EC, 1998) sets the limit value of the individual pesticides in drinking water at 0.1 μg L −1 (3.8 nmol L −1 ), and that of the total pesticides at 0.5 μg L −1 (19 nmol L −1 ), while the U.S. Environmental Protection Agency Office of Ground Water and Drinking Water (OGWDW) sets the health advisory level for methyl parathion in drinking water at 2 μg L −1 (7.6 nmol L −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, they emerged as a promising alternative to the time‐consuming and expensive off‐site chromatographic techniques currently used [5–7]. Some typical examples include the electrochemical quantification of nitrophenyl substituted OPs, selecting methyl parathion as a model [8–25],…”

Section: Introductionmentioning

confidence: 99%

Stripping Voltammetric Determination of Methyl Parathion at Activated Carbon Nanopowder Modified Electrode

et al. 2020

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An activated carbon nanopowder modified glassy carbon electrode (AC‐GCE) was constructed for the sensitive determination of methyl parathion by adsorptive differential pulse anodic stripping voltammetry. The simple and rapid modification procedure included only drop‐coating the electrode surface with a laponite stabilized activated carbon nanopowder suspension and drying. The modifier high adsorption ability, combined with its large electroactive surface area allowed a 30‐fold signal increase to be achieved, compared to bare GCE. Under optimized experimental conditions (activated carbon to laponite ratio, pH and accumulation time), the AC‐GCE exhibited a linear response to methyl parathion in two concentration ranges: from 0.01 μmol L−1 to 1 μmol L−1 and from 1 μmol L−1 to 6 μmol L−1. The LOD of 2.5 nmol L−1 (S/N=3) achieved fitted with regulatory norms. It was demonstrated that the as‐prepared AC‐GCE is suitable for routine real samples analysis.

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“…Transition metal oxide NPs have numerous applications as catalysts, sensors, superconductors, magnetic resonance imaging (MRI) and sun-based cells, and adsorbents [1]. As an important functional metal oxide, manganese oxide in NPs form is one of the most attractive inorganic materials because of its physical and chemical properties and wide range of applications such as in catalysis, ion exchange, molecular adsorption, biosensors, and particularly in energy storage [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Impact of Zn-doped Manganese Oxide Nanoparticles on Structural and Optical Properties

Yadav¹,

Shukla²,

Sharma³

2022

J. Sci. Res.

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In the present work, the structural and optical properties of pure and zinc-doped manganese oxide nanoparticles prepared by the sol-gel method have been studied for doping concentrations of 5, 10, and 15 %. The XRD patterns reveal that the cubic phase of pure manganese oxide nanoparticles is changed to tetragonal on doping with Zn. The surface morphology of pure and Zn doped manganese oxide nanoparticles has been studied by Scanning Electron Microscopy (SEM), which reveals appreciable changes in size and shape of the nanoparticles as the doping level of Zn is increased. The optical properties studied by UV-Visible spectroscopy further reveal that the energy band gap increases with a decrease in the size of nanoparticles.

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Utilization of a MnO2/polythiophene/rGO nanocomposite modified glassy carbon electrode as an electrochemical sensor for methyl parathion

Cited by 25 publications

References 49 publications

Electroanalysis of Ascorbic Acid in Fresh Orange Juice Using a PTH/MWCNTCOOH-RGO/CS/CuO Film Modified Carbon Paste Electrode

Electroanalysis of Ascorbic Acid in Fresh Orange Juice Using a PTH/MWCNTCOOH-RGO/CS/CuO Film Modified Carbon Paste Electrode

Stripping Voltammetric Determination of Methyl Parathion at Activated Carbon Nanopowder Modified Electrode

Impact of Zn-doped Manganese Oxide Nanoparticles on Structural and Optical Properties

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