Carbon nanotube-based nanocomposite sensor tuned with a catechol as novel electrochemical recognition platform of uranyl ion in aqueous samples

SENSORS AND ACTUATORS B-CHEMICAL

卷:273

Article

Munoz, Jose¹  Montes, Raquel²  Bastos-Arrieta, Julio^3,4  Guardingo, Mireia⁵  Busque, Felix⁶  Ruiz-Molina, Daniel⁵  Palet, Cristina⁶  Garcia-Orellana, Jordi^7,8  Baeza, Mireia⁶ 

[1] CSIC, Inst Ciencia Mat Barcelona ICMAB, Mol Nanosci & Organ Mat Grp, Campus UAB, Cerdanyola Del Valles 08193, Bellaterra, Spain

[2] Univ Autonoma Barcelona, Escola Engn, Dept Engn Quim, GENOCOV Res Grp, Cerdanyola Del Valles 08193, Bellaterra, Spain

[3] Univ Politecn Cataluna, Dept Engn Quim, Campus Diagonal Besos,Edifici 1 EEBE, Barcelona 08019, Spain

[4] Barcelona Res Ctr Multiscale Sci & Engn, Barcelona 08019, Spain

[5] Inst Catala Nanociencia & Nanotecnol ICN2, Edifici ICN2,Campus UAB, Cerdanyola Del Valles 08193, Bellaterra, Spain

[6] Univ Autonoma Barcelona, Fac Ciencies, Dept Quim, Edifici C Nord, Cerdanyola Del Valles 08193, Bellaterra, Spain

[7] Univ Autonoma Barcelona, Fac Ciencies, Dept Fis, Edifici C Nord, Cerdanyola Del Valles 08193, Bellaterra, Spain

[8] ICTA, Campus UAB, Cerdanyola Del Valles 08193, Bellaterra, Spain

关键词: Uranyl;    Supramolecular chemistry;    Carbon paste electrode;    Gold nanoparticles;    Water pollutants;    Amperometry;   

DOI  :  10.1016/j.snb.2018.07.093

来源: Elsevier

【 摘 要 】

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 (UO22+) in water. Recognition of UO22+ is accomplished by supramolecular chemistry due to the formation of an inclusion complex between catechol and UO22+. The amperometric device operates at -0.40 V vs. Ag/AgCl, where the reduction of UO22+ takes place on the electrode surface, covering a linear range from 0.49 to 170 mu g L-1 UO22+ in a 0.1 M boric acid buffer solution at pH 5.3. The developed sensing system presents good response towards UO22+ 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.

【 授权许可】

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