Electrochemical Sensing of Epinephrine on a Carbon Nanofibers and Gold Nanoparticle-Modified Electrode

Carbon nanofiber-gold nanoparticle electrochemical sensor was fabricated by drop-coating carbon nanofiber followed by electrodeposition of gold nanoparticles on a glassy carbon electrode (GCE), for the detection of epinephrine (EP). The acid-activated carbon nanofibers were characterised by Fourier...

Full description

Saved in:
Bibliographic Details
Published in:Electrocatalysis 2023, Vol.14 (1), p.9-17
Main Authors: Sipuka, Dimpo S., Sebokolodi, Tsholofelo I., Olorundare, Foluke O. G., Muzenda, Charles, Nkwachukwu, Oluchi V., Nkosi, Duduzile, Arotiba, Omotayo A.
Format: Article
Language:English
Subjects:
Activated carbon
Carbon fibers
Catalysis
Chemical sensors
Chemistry
Chemistry and Materials Science
Electrochemical impedance spectroscopy
Electrochemistry
Electrodes
Electron microscopy
Emission analysis
Energy Systems
Epinephrine
Field emission microscopy
Field emission spectroscopy
Fourier transforms
Glassy carbon
Gold
Infrared spectroscopy
Microscopy
Nanofibers
Nanomaterials
Nanoparticles
Original Research
Physical Chemistry
Sensors
Spectrum analysis
Square waves
Voltammetry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Carbon nanofiber-gold nanoparticle electrochemical sensor was fabricated by drop-coating carbon nanofiber followed by electrodeposition of gold nanoparticles on a glassy carbon electrode (GCE), for the detection of epinephrine (EP). The acid-activated carbon nanofibers were characterised by Fourier transform infrared spectroscopy. Field emission scanning electron microscopy and transmission electron microscopy were used to study the morphological and structural properties of the nanomaterials. Cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and square wave voltammetry were used for electrochemical characterisation of the electrodes in each step of the construction of the electrochemical sensor. When compared to the bare GCE, the modified electrode had enhanced electrocatalytic effect. Square wave voltammetry was used for the quantitative determination of epinephrine. A well-defined anodic peak potential for epinephrine was observed at pH 6 in 0.1 M phosphate buffered solution (PBS). The sensor was linear within epinephrine concentration range of 50 µM to 1 mM with a detection limit of 1.70 µM. Graphical abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-022-00769-9