Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub>
In this study, a novel electrochemical sensor was developed for the quantitative determination of riboflavin. The tungsten disulfide (WS<sub>2</sub>) layer was deposited on carbon nanotubes (CNTs) by atomic layer deposition (ALD), forming a CNTs-WS<sub>2</sub> core–shell hete...
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MDPI AG
2024-03-01
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| author | Rayhane Zribi Muhammad Hamid Raza Nicola Pinna Giovanni Neri |
| author_facet | Rayhane Zribi Muhammad Hamid Raza Nicola Pinna Giovanni Neri |
| author_sort | Rayhane Zribi |
| collection | DOAJ |
| description | In this study, a novel electrochemical sensor was developed for the quantitative determination of riboflavin. The tungsten disulfide (WS<sub>2</sub>) layer was deposited on carbon nanotubes (CNTs) by atomic layer deposition (ALD), forming a CNTs-WS<sub>2</sub> core–shell heterostructure. This material was used to modify the commercial screen-printed carbon electrode in order to enhance its electrocatalytic activity toward the detection of vitamin B<sub>2</sub>. Cyclic voltammetry was performed as a preliminary test in the presence of riboflavin. In addition to this, an extensive electrochemical study was performed using differential pulse voltammetry, demonstrating that modified the CNTs-WS<sub>2</sub>/SPCE sensor display superior electrochemical performance compared with bare SPCE. The sensor exhibits a linear response in the concentration range from 0 µM to 45 µM, with remarkably enhanced sensitivity (9 μAμM<sup>−1</sup>cm<sup>−2</sup>) compared with the bare electrode, with a limit of detection (LOD) of 1.24 µM. This enhancement is attributed to the conformal growth of the WS2 flakes on the CNTs and the high surface area offered by these flakes. |
| format | Article |
| id | doaj-art-7129a1261d134cb994e3c156d2e42c44 |
| institution | Kabale University |
| issn | 2504-3900 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Proceedings |
| spelling | doaj-art-7129a1261d134cb994e3c156d2e42c442024-12-27T14:48:38ZengMDPI AGProceedings2504-39002024-03-019713910.3390/proceedings2024097039Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> Rayhane Zribi0Muhammad Hamid Raza1Nicola Pinna2Giovanni Neri3Department of Engineering, University of Messina, 98166 Messina, ItalyInstitut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, 2, 12489 Berlin, GermanyInstitut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, 2, 12489 Berlin, GermanyDepartment of Engineering, University of Messina, 98166 Messina, ItalyIn this study, a novel electrochemical sensor was developed for the quantitative determination of riboflavin. The tungsten disulfide (WS<sub>2</sub>) layer was deposited on carbon nanotubes (CNTs) by atomic layer deposition (ALD), forming a CNTs-WS<sub>2</sub> core–shell heterostructure. This material was used to modify the commercial screen-printed carbon electrode in order to enhance its electrocatalytic activity toward the detection of vitamin B<sub>2</sub>. Cyclic voltammetry was performed as a preliminary test in the presence of riboflavin. In addition to this, an extensive electrochemical study was performed using differential pulse voltammetry, demonstrating that modified the CNTs-WS<sub>2</sub>/SPCE sensor display superior electrochemical performance compared with bare SPCE. The sensor exhibits a linear response in the concentration range from 0 µM to 45 µM, with remarkably enhanced sensitivity (9 μAμM<sup>−1</sup>cm<sup>−2</sup>) compared with the bare electrode, with a limit of detection (LOD) of 1.24 µM. This enhancement is attributed to the conformal growth of the WS2 flakes on the CNTs and the high surface area offered by these flakes.https://www.mdpi.com/2504-3900/97/1/39atomic layer depositiontungsten disulfidecarbon nanotubeselectrochemical sensorriboflavin |
| spellingShingle | Rayhane Zribi Muhammad Hamid Raza Nicola Pinna Giovanni Neri Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> Proceedings atomic layer deposition tungsten disulfide carbon nanotubes electrochemical sensor riboflavin |
| title | Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> |
| title_full | Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> |
| title_fullStr | Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> |
| title_full_unstemmed | Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> |
| title_short | Electrochemical Performance of WS<sub>2</sub>-CNT Core–Shell Heterostructures for the Detection of Vitamin B<sub>2</sub> |
| title_sort | electrochemical performance of ws sub 2 sub cnt core shell heterostructures for the detection of vitamin b sub 2 sub |
| topic | atomic layer deposition tungsten disulfide carbon nanotubes electrochemical sensor riboflavin |
| url | https://www.mdpi.com/2504-3900/97/1/39 |
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