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Título : Carbon nanostructured films modified by metal nanoparticles supported on filtering membranes for electroanalysis
Autor : Páramo Martín, Ana Erica
Palmero Díaz, Susana
Heras, Aránzazu
Colina, Álvaro
Publicado en: Talanta. 2018, V. 178, p. 736-742
Editorial : Elsevier
Fecha de publicación : feb-2018
Fecha de disponibilidad: feb-2020
ISSN : 0039-9140
DOI: 10.1016/j.talanta.2017.10.019
Resumen : A novel methodology to prepare sensors based on carbon nanostructures electrodes modified by metal nanoparticles is proposed. As a proof of concept, a novel bismuth nanoparticle/carbon nanofiber (Bi-NPs/CNF) electrode and a carbon nanotube (CNT)/gold nanoparticle (Au-NPs) have been developed. Bi-NPs/CNF films were prepared by 1) filtering a dispersion of CNFs on a polytetrafluorethylene (PTFE) filter, and 2) filtering a dispersion of Bi-NPs chemically synthesized through this CNF/PTFE film. Next the electrode is prepared by sticking the Bi-NPs/CNF/PTFE film on a PET substrate. In this work, Bi-NPs/CNF ratio was optimized using a Cd2+ solution as a probe sample. The Cd anodic stripping peak intensity, registered by differential pulse anodic stripping voltammetry (DPASV), is selected as target signal. The voltammograms registered for Cd stripping with this Bi-NPs/CNF/PTFE electrode showed well-defined and highly reproducible electrochemical. The optimized Bi-NPs/CNF electrode exhibits a Cd2+ detection limit of 53.57 ppb. To demonstrate the utility and versatility of this methodology, single walled carbon nanotubes (SWCNTs) and gold nanoparticles (Au-NPs) were selected to prepare a completely different electrode. Thus, the new Au-NPs/SWCNT/PTFE electrode was tested with a multiresponse technique. In this case, UV/Vis absorption spectroelectrochemistry experiments were carried out for studying dopamine, demonstrating the good performance of the Au-NPs/SWCNT electrode developed.
Palabras clave: Carbon nanofibers electrodes
Single-walled carbon nanotubes electrodes
Bismuth nanoparticles
Gold nanoparticles
Electroanalysis
Materia: Química analítica
Chemistry, Analytic
Licencia: http://creativecommons.org/licenses/by-nc-nd/4.0/
URI : http://hdl.handle.net/10259/4937
Versión del editor: https://doi.org/10.1016/j.talanta.2017.10.019
Aparece en las colecciones: Artículos GAIN

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