Electrochemical investigation of adsorption of graphene oxide at an interface between two immiscible electrolyte solutions

The adsorption behavior of graphene oxide (GO) nanosheets at an interface between two immiscible electrolyte solutions (ITIES) was electrochemically investigated firstly by using cyclic voltammetry (CV) and alternating current voltammetry (ACV).

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Determination of formal potentials of chemically unstable redox couples by second-harmonic alternating current voltammetry and cyclic voltammetry. Application to the oxidation of thiophenoxide ions

Journal of the American Chemical Society ◽

10.1021/ja00070a026 ◽

1993 ◽

Vol 115 (17) ◽

pp. 7783-7788 ◽

Cited By ~ 17

Author(s):

Claude P. Andrieux ◽

Philippe Hapiot ◽

Jean Pinson ◽

Jean Michel Saveant

Keyword(s):

Cyclic Voltammetry ◽

Second Harmonic ◽

Alternating Current ◽

Redox Couples ◽

Alternating Current Voltammetry

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Comparison of the Stem-Loop and Linear Probe-Based Electrochemical DNA Sensors by Alternating Current Voltammetry and Cyclic Voltammetry

Langmuir ◽

10.1021/la203015v ◽

2011 ◽

Vol 27 (23) ◽

pp. 14669-14677 ◽

Cited By ~ 45

Author(s):

Weiwei Yang ◽

Rebecca Y. Lai

Keyword(s):

Cyclic Voltammetry ◽

Alternating Current ◽

Dna Sensors ◽

Stem Loop ◽

Linear Probe ◽

Alternating Current Voltammetry

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Solar Exfoliated Graphene Oxide: A Platform for Electrochemical Sensing of Epinephrine

Current Analytical Chemistry ◽

10.2174/1573411015666190104110928 ◽

2020 ◽

Vol 16 (4) ◽

pp. 393-403 ◽

Cited By ~ 1

Author(s):

Renjini Sadhana ◽

Pinky Abraham ◽

Anithakumary Vidyadharan

Keyword(s):

Cyclic Voltammetry ◽

Graphene Oxide ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Simultaneous Detection ◽

Differential Pulse ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Reduced Graphene ◽

Pulse Voltammetry

Introduction: In this study, solar exfoliated graphite oxide modified glassy carbon electrode was used for the anodic oxidation of epinephrine in a phosphate buffer medium at pH7. The modified electrode showed fast response and sensitivity towards Epinephrine Molecule (EP). The electrode was characterized electrochemically through Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV). Area of the electrode enhanced three times during modification and studies reveal that the oxidation process of EP occurs by an adsorption controlled process involving two electrons. The results showed a detection limit of 0.50 ± 0.01μM with a linear range up to 100 μM. The rate constant calculated for the electron transfer reaction is 1.35 s-1. The electrode was effective for simultaneous detection of EP in the presence of Ascorbic Acid (AA) and Uric Acid (UA) with well-resolved signals. The sensitivity, selectivity and stability of the sensor were also confirmed. Methods: Glassy carbon electrode modified by reduced graphene oxide was used for the detection and quantification of epinephrine using cyclic voltammetry and differential pulse voltammetry. Results: The results showed an enhancement in the electrocatalytic oxidation of epinephrine due to the increase in the effective surface area of the modified electrode. The anodic transfer coefficient, detection limit and electron transfer rate constant of the reaction were also calculated. Conclusion: The paper reports the determination of epinephrine using reduced graphene oxide modified glassy carbon electrode through CV and DPV. The sensor exhibited excellent reproducibility and repeatability for the detection of epinephrine and also its simultaneous detection of ascorbic acid and uric acid, which coexist in the biological system.

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Effect of Deposition Parameters on Electrochemical Properties of Polypyrrole-Graphene Oxide Films

Materials ◽

10.3390/ma13030624 ◽

2020 ◽

Vol 13 (3) ◽

pp. 624 ◽

Cited By ~ 1

Author(s):

Alina Iuliana Pruna ◽

Nelly Ma. Rosas-Laverde ◽

David Busquets Mataix

Keyword(s):

Cyclic Voltammetry ◽

Graphene Oxide ◽

Electrochemical Properties ◽

Sodium Dodecyl ◽

Hybrid Coatings ◽

Deposition Parameters ◽

Structure Morphology ◽

Energy Storage Applications ◽

Improved Performance ◽

Sds Surfactant

Graphene oxide (GO)-modified polypyrrole (PPy) coatings were obtained by electrochemical methods in the presence of the anionic surfactant, sodium dodecyl sulfate (SDS). The structure, morphology, and electrochemical properties of the coatings were assessed by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and cyclic voltammetry at varying scan rates, respectively. The properties of the obtained coatings were analyzed with the GO and PPy loadings and electrodeposition mode. The hybrid coatings obtained galvanostatically showed a coarser appearance than those deposited by cyclic voltammetry CV mode and improved performance, respectively, which was further enhanced by GO and PPy loading. The capacitance enhancement can be attributed to the SDS surfactant that well dispersed the GO sheets, thus allowing the use of lower GO content for improved contribution, while the choice of suitable electrodeposition parameters is highly important for improving the applicability of GO-modified PPy coatings in energy storage applications.

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Reduced Graphene Oxide Fibre Electrodes for Drug Sensing

Proceedings ◽

10.3390/proceedings2021068018 ◽

2021 ◽

Vol 68 (1) ◽

pp. 18

Author(s):

Sutthima Sriprasertsuk ◽

John R. Varcoe ◽

Carol Crean

Keyword(s):

Cyclic Voltammetry ◽

Graphene Oxide ◽

Carbon Fibre ◽

Reduced Graphene Oxide ◽

Limit Of Detection ◽

Linear Range ◽

Oxidation Peak ◽

Reduced Graphene ◽

Fibre Sensor ◽

Model Drug

Reduced graphene oxide (rGO) fibre electrodes and their ability to sense paracetamol (as model drug) were studied. rGO was electrodeposited onto carbon fibre by two different approaches: potentiostatic deposition and cyclic voltammetry (CV) in the presence of graphene oxide solution. Carbon fibre electrodes coated with rGO (after five CV cycles) could sense paracetamol with an oxidation peak at 0.62 V (vs. Ag/AgCl). The limit of detection of this fibre sensor was found to be 36.3 µM with a linear range of 50–500 µM of paracetamol (R2 = 0.9901).

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