Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite
The electrochemical oxidation of pyrene, a well-known polycyclic aromatic hydrocarbon, was investigated using a glassy carbon electrode (GCE) modified with nanocomposite of copper oxide nanoparticles incorporated functionalized multi-walled carbon nanotubes (fMWCNTs). The catalytic copper oxide nano...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2024-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ad176d |
| _version_ | 1797311012168269824 |
|---|---|
| author | Funmilola A Adesanya Omolola E Fayemi |
| author_facet | Funmilola A Adesanya Omolola E Fayemi |
| author_sort | Funmilola A Adesanya |
| collection | DOAJ |
| description | The electrochemical oxidation of pyrene, a well-known polycyclic aromatic hydrocarbon, was investigated using a glassy carbon electrode (GCE) modified with nanocomposite of copper oxide nanoparticles incorporated functionalized multi-walled carbon nanotubes (fMWCNTs). The catalytic copper oxide nanoparticles (CuONPs) synthesized through a chemical co-precipitation method was combined with the highly electrically conductive functionalized multi-walled carbon nanotubes using a simple and efficient method. Several analytical techniques were employed in characterizing the nanomaterials namely: the scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD), and the ultraviolet–visible (UV–vis) spectroscopy, to validate the authenticity of the synthesis. The electrochemical behaviour of the proposed electrode was investigated in 10 mM [Fe(CN) _6 ] ^3-/4- via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), revealing the highest current response and lowest charge transfer resistance at the hybrid nanocomposite modified electrode (GCE/fMWCNTs/CuO NPs) in comparison with the other electrodes studied in this work (GCE, GCE/CuO NPs, and GCE/fMWCNTs. The electrocatalytic efficacy of the electrodes towards pyrene oxidation was also evaluated, with a similarly outstanding increment in the oxidation peak current response and highly reduced resistance to charge transfer at the nanocomposite-modified glassy carbon electrode. This enhanced electrocatalytic activity facilitated the transport of electrons between the pyrene molecules and the nanocomposite-modified electrode which is attributable to the synergy between the functionalized multi-walled carbon nanotubes and the copper oxide nanoparticles. The low detection limit of 1.30 μ M within the linear range (1.2–23.1 μ M) demonstrated by the sensor indicates its high sensitivity and potential for environmental based analytical applications such as pyrene detection. |
| first_indexed | 2024-03-08T01:52:23Z |
| format | Article |
| id | doaj.art-d51df6933bd64c8a8941a88a6cf8457f |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-08T01:52:23Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-d51df6933bd64c8a8941a88a6cf8457f2024-02-14T09:58:20ZengIOP PublishingMaterials Research Express2053-15912024-01-0111202500410.1088/2053-1591/ad176dElectro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocompositeFunmilola A Adesanya0Omolola E Fayemi1https://orcid.org/0000-0002-0049-5184Department of Chemistry, Faculty of Natural and Agricultural Sciences, North-West University (Mafikeng Campus) , Private Bag X2046, Mmabatho 2735, South AfricaDepartment of Chemistry, Faculty of Natural and Agricultural Sciences, North-West University (Mafikeng Campus) , Private Bag X2046, Mmabatho 2735, South Africa; Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University (Mafikeng Campus) , Private Bag X2046, Mmabatho 2735, South AfricaThe electrochemical oxidation of pyrene, a well-known polycyclic aromatic hydrocarbon, was investigated using a glassy carbon electrode (GCE) modified with nanocomposite of copper oxide nanoparticles incorporated functionalized multi-walled carbon nanotubes (fMWCNTs). The catalytic copper oxide nanoparticles (CuONPs) synthesized through a chemical co-precipitation method was combined with the highly electrically conductive functionalized multi-walled carbon nanotubes using a simple and efficient method. Several analytical techniques were employed in characterizing the nanomaterials namely: the scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD), and the ultraviolet–visible (UV–vis) spectroscopy, to validate the authenticity of the synthesis. The electrochemical behaviour of the proposed electrode was investigated in 10 mM [Fe(CN) _6 ] ^3-/4- via electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), revealing the highest current response and lowest charge transfer resistance at the hybrid nanocomposite modified electrode (GCE/fMWCNTs/CuO NPs) in comparison with the other electrodes studied in this work (GCE, GCE/CuO NPs, and GCE/fMWCNTs. The electrocatalytic efficacy of the electrodes towards pyrene oxidation was also evaluated, with a similarly outstanding increment in the oxidation peak current response and highly reduced resistance to charge transfer at the nanocomposite-modified glassy carbon electrode. This enhanced electrocatalytic activity facilitated the transport of electrons between the pyrene molecules and the nanocomposite-modified electrode which is attributable to the synergy between the functionalized multi-walled carbon nanotubes and the copper oxide nanoparticles. The low detection limit of 1.30 μ M within the linear range (1.2–23.1 μ M) demonstrated by the sensor indicates its high sensitivity and potential for environmental based analytical applications such as pyrene detection.https://doi.org/10.1088/2053-1591/ad176dpyrenecopper oxideglassy carbon electrodemulti-walled carbon nanotubesvoltammetry |
| spellingShingle | Funmilola A Adesanya Omolola E Fayemi Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite Materials Research Express pyrene copper oxide glassy carbon electrode multi-walled carbon nanotubes voltammetry |
| title | Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite |
| title_full | Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite |
| title_fullStr | Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite |
| title_full_unstemmed | Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite |
| title_short | Electro-oxidation of pyrene on glassy carbon electrode modified with fMWCNTs/CuO nanocomposite |
| title_sort | electro oxidation of pyrene on glassy carbon electrode modified with fmwcnts cuo nanocomposite |
| topic | pyrene copper oxide glassy carbon electrode multi-walled carbon nanotubes voltammetry |
| url | https://doi.org/10.1088/2053-1591/ad176d |
| work_keys_str_mv | AT funmilolaaadesanya electrooxidationofpyreneonglassycarbonelectrodemodifiedwithfmwcntscuonanocomposite AT omololaefayemi electrooxidationofpyreneonglassycarbonelectrodemodifiedwithfmwcntscuonanocomposite |