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...
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| Veröffentlicht in: | Electrocatalysis 2023, Vol.14 (1), p.9-17 |
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| creator | Sipuka, Dimpo S. Sebokolodi, Tsholofelo I. Olorundare, Foluke O. G. Muzenda, Charles Nkwachukwu, Oluchi V. Nkosi, Duduzile Arotiba, Omotayo A. |
| description | 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.
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| doi_str_mv | 10.1007/s12678-022-00769-9 |
| format | Article |
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Graphical abstract</description><subject>Activated carbon</subject><subject>Carbon fibers</subject><subject>Catalysis</subject><subject>Chemical sensors</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Electrochemistry</subject><subject>Electrodes</subject><subject>Electron microscopy</subject><subject>Emission analysis</subject><subject>Energy Systems</subject><subject>Epinephrine</subject><subject>Field emission microscopy</subject><subject>Field emission spectroscopy</subject><subject>Fourier transforms</subject><subject>Glassy carbon</subject><subject>Gold</subject><subject>Infrared spectroscopy</subject><subject>Microscopy</subject><subject>Nanofibers</subject><subject>Nanomaterials</subject><subject>Nanoparticles</subject><subject>Original Research</subject><subject>Physical Chemistry</subject><subject>Sensors</subject><subject>Spectrum analysis</subject><subject>Square waves</subject><subject>Voltammetry</subject><issn>1868-2529</issn><issn>1868-5994</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9ULtOAzEQPCGQiEJ-gMoStcGvu7NLFIWAFKAAasvnR-LoYh_2peDvcR4SHVvszq5mZqWpqluM7jFC7UPGpGk5RITAsjYCiotqgnnDYS0EuzxjUhNxXc1y3qJSVFDE60nlFr3VY4p6Y3deqx582JB9WIPowGLwwQ6bVDqIASgwV6kr4E2F6HxnUwYqGLCMvTneBpVGr3sLX6PxzlsDzubG3lRXTvXZzs5zWn09LT7nz3D1vnyZP66gJkyMkDnTIWVYjYyyDW8s00gxTY1SFAnuao0p0hg5jDm2BrGu5U43xnSUM0MxnVZ3J98hxe-9zaPcxn0K5aUkLROIobo5sMiJpVPMOVknh-R3Kv1IjOQhUnmKVJZI5TFSKYqInkS5kMPapj_rf1S_N056IQ</recordid><startdate>2023</startdate><enddate>2023</enddate><creator>Sipuka, Dimpo S.</creator><creator>Sebokolodi, Tsholofelo I.</creator><creator>Olorundare, Foluke O. G.</creator><creator>Muzenda, Charles</creator><creator>Nkwachukwu, Oluchi V.</creator><creator>Nkosi, Duduzile</creator><creator>Arotiba, Omotayo A.</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-8227-8684</orcidid></search><sort><creationdate>2023</creationdate><title>Electrochemical Sensing of Epinephrine on a Carbon Nanofibers and Gold Nanoparticle-Modified Electrode</title><author>Sipuka, Dimpo S. ; Sebokolodi, Tsholofelo I. ; Olorundare, Foluke O. 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G.</creatorcontrib><creatorcontrib>Muzenda, Charles</creatorcontrib><creatorcontrib>Nkwachukwu, Oluchi V.</creatorcontrib><creatorcontrib>Nkosi, Duduzile</creatorcontrib><creatorcontrib>Arotiba, Omotayo A.</creatorcontrib><collection>CrossRef</collection><jtitle>Electrocatalysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sipuka, Dimpo S.</au><au>Sebokolodi, Tsholofelo I.</au><au>Olorundare, Foluke O. 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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.
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| 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 |
| title | Electrochemical Sensing of Epinephrine on a Carbon Nanofibers and Gold Nanoparticle-Modified Electrode |
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