Electrochemical sensor based on multiwalled carbon nanotube and gold nanoparticle modified electrode for the sensitive detection of bisphenol A

Messaoud, Najib Ben; Ghica, Mariana Emilia; Dridi, C.; Ali, Mounir Ben; Brett, Christopher M. A.

doi:10.1016/j.snb.2017.06.160

Cited by 215 publications

(65 citation statements)

References 49 publications

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“…However, chemical synthesis is the easier procedure, since no instrumentation or complex compounds are needed; simple molecules can act both as reducing and dispersing agent, such as the citrate salt, with minimum heating . Synergistic effects resulting from the deposition of both of these nanostructured materials on glassy carbon electrodes (GCE) can increase conductivity, sensitivity and selectivity towards electroactive analytes . The characterization of the modified electrodes using electrochemical impedance spectroscopy (EIS) with a suitable probe or in the presence of the analyte itself can be used to evaluate the influence of the surface architecture on the electrochemical behavior …”

Section: Introductionmentioning

confidence: 99%

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

2020

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The electrochemical characterization and determination of the antibiotic cefadroxil were carried out at multi-walled carbon nanotube (CNT) and gold nanoparticle (AuNP) modified glassy carbon electrodes (GCE). Oxidation of the phenol moiety of cefadroxil occurred at slightly less-positive potentials and with a higher current response than at bare GCE. Differential pulse voltammetry and electrochemical impedance spectroscopy showed that the architecture combining CNT and AuNP surface modification is the best in pH 7 buffer solution. Scanning electron microscopy demonstrated good coverage of the AuNPs on the CNTs. The fixed potential amperometric determination of cefadroxil was carried out at + 0.74 V vs Ag/AgCl with a limit of detection of 0.22 μM. Analysis of cefadroxil in commercial samples presented high recovery values and the amount of the pharmaceutical in each capsule was in excellent agreement with that measured by UV/Vis spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

2020

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“…The conventional electrodes have poor performance to analytes due to the easy deterioration of electrode surface by the analyte and related intermediates, thus many researchers prefer to study with the modified electrodes . Among various kinds of modifiers, carbon nanotubes (CNTs) have attracted tremendous interest since it possess high surface‐to‐volume ratio, excellent conductivity, chemical stability and also have ability to be easily functionalized and modified to surfaces . All of these features make CNTs one of the most‐preferred in the modification of the electrodes.…”

Section: Introductionmentioning

confidence: 99%

Poly(Taurine‐Glutathione)/Carbon Nanotube Modified Glassy Carbon Electrode as a New Levofloxacin Sensor

Koçak

2019

Electroanalysis

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A new highly sensitive and selective electrochemical levofloxacin sensor based on co‐polymer‐carbon nanotube composite electrode was developed. Taurine and Glutathione were electrochemically co‐polymerized on multiwalled carbon nanotubes modified glassy carbon electrode (Poly(TAU‐GSH)/CNT/GCE) and used as a levofloxacin sensor in pH 6 phosphate buffer solution. The new composite electrode surfaces were characterized by scanning electron microscopy, atomic force microscopy and electrochemical impedance spectroscopy. Under the optimized conditions, two linear segments were obtained for increasing LEV concentrations between 20 nmol L−1‐1 μmol L−1 and 1.5 μmol L−1‐55 μmol L−1 LEV with a detection limit of 9 nmol L−1 using amperometry. Poly(TAU‐GSH)/CNT/GCE exhibited high sensitivity, selectivity with good stability. The new sensor was employed for real samples of LEV tablets and urine. Promising results were obtained with good accuracy which were also in accordance with LC‐MS/MS analysis.

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“…Carbon nanotubes as a strictly one‐dimensional material, is well known to its specific physical and chemical properties. It has a large surface area and the property to facilitate electron transfer between electroactive species and the surface of the electrode . Hence, a nanocomposites sensor based on noble metal and carbon nanotubes could be promising for electrochemical determination of caffeic acid.…”

Section: Introductionmentioning

confidence: 99%

A Sensor Based on Hollow, Octahedral, Cu₂O‐Supported Palladium Nanoparticles – Prepared by a Galvanic Replacement Reaction – and Carboxylic Multi‐Walled Carbon Nanotubes for Electrochemical Detection of Caffeic Acid in Red Wine

Zhang

Liu

et al. 2019

ChemistrySelect

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A novel nanocomposites prepared from hollow, octahedral cuprous oxide supported palladium nanoparticles (Cu 2 O-PdNPs) through a facile galvanic replacement reaction and carboxylic multi-walled carbon nanotubes (MWCNTs-COOH) was modified on the surface of glassy carbon electrode (Cu 2 O-PdNPs@MWCNTs-COOH/GCE) to fabricate a sensor for electrochemical detection of caffeic acid. The synergistic effect between Cu 2 O-PdNPs and MWCNTs-COOH exhibited remark-able electrocatalytic activity, higher selectivity and higher sensitivity toward caffeic acid. At optimized test conditions, the Cu 2 O-PdNPs@MWCNTs-COOH/GCE nanocomposites sensor revealed wider linear range of 0.006-60 μM with a lower detection limit of 0.002 μM (S/N = 3) for caffeic acid determination. Eventually, the proposed nanocomposites sensor was successfully applied to determine the concentration of caffeic acid in red wine samples.

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Electrochemical sensor based on multiwalled carbon nanotube and gold nanoparticle modified electrode for the sensitive detection of bisphenol A

Cited by 215 publications

References 49 publications

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

Poly(Taurine‐Glutathione)/Carbon Nanotube Modified Glassy Carbon Electrode as a New Levofloxacin Sensor

A Sensor Based on Hollow, Octahedral, Cu₂O‐Supported Palladium Nanoparticles – Prepared by a Galvanic Replacement Reaction – and Carboxylic Multi‐Walled Carbon Nanotubes for Electrochemical Detection of Caffeic Acid in Red Wine

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Electrochemical sensor based on multiwalled carbon nanotube and gold nanoparticle modified electrode for the sensitive detection of bisphenol A

Cited by 215 publications

References 49 publications

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

Electroanalysis of Cefadroxil Antibiotic at Carbon Nanotube/Gold Nanoparticle Modified Glassy Carbon Electrodes

Poly(Taurine‐Glutathione)/Carbon Nanotube Modified Glassy Carbon Electrode as a New Levofloxacin Sensor

A Sensor Based on Hollow, Octahedral, Cu2O‐Supported Palladium Nanoparticles – Prepared by a Galvanic Replacement Reaction – and Carboxylic Multi‐Walled Carbon Nanotubes for Electrochemical Detection of Caffeic Acid in Red Wine

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A Sensor Based on Hollow, Octahedral, Cu₂O‐Supported Palladium Nanoparticles – Prepared by a Galvanic Replacement Reaction – and Carboxylic Multi‐Walled Carbon Nanotubes for Electrochemical Detection of Caffeic Acid in Red Wine