Carbon nanotube-based nanocomposite sensor tuned with a catechol as novel electrochemical recognition platform of uranyl ion in aqueous samples
This article reports a novel electrochemical recognition platform based on a nanocomposite carbon paste electrode containing carbon nanotubes modified with gold nanoparticles carrying a thiolated catechol for the fast amperometric determination of uranyl ion (UO ) in water. Recognition of UO is acco...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:224242 |
| Acceso en línea: | https://ddd.uab.cat/record/224242 https://dx.doi.org/urn:doi:10.1016/j.snb.2018.07.093 |
| Access Level: | acceso abierto |
| Palabra clave: | Uranyl Supramolecular chemistry Carbon paste electrode Gold nanoparticles Water pollutants Amperometry |
| Sumario: | This article reports a novel electrochemical recognition platform based on a nanocomposite carbon paste electrode containing carbon nanotubes modified with gold nanoparticles carrying a thiolated catechol for the fast amperometric determination of uranyl ion (UO ) in water. Recognition of UO is accomplished by supramolecular chemistry due to the formation of an inclusion complex between catechol and UO . The amperometric device operates at -0.40 V vs. Ag/AgCl, where the reduction of UO takes place on the electrode surface, covering a linear range from 0.49 to 170 μg L UO in a 0.1 M boric acid buffer solution at pH 5.3. The developed sensing system presents good response towards UO in aqueous environmental samples, with good selectivity over other browsed cations and can be easily reset by simple polishing. This platform has demonstrated to be a potential alternative regarding to the common standard bench-top analytical techniques for the development of in-field devices for in-situ monitoring. |
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