2024-03-29T08:07:11Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/49372022-12-19T09:45:28Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Carbon nanostructured films modified by metal nanoparticles supported on filtering membranes for electroanalysis
Páramo Martín, Ana Erica
Palmero Díaz, Susana
Heras Vidaurre, Aránzazu
Colina Santamaría, Álvaro
Carbon nanofibers electrodes
Single-walled carbon nanotubes electrodes
Bismuth nanoparticles
Gold nanoparticles
Electroanalysis
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.
2018-09-12T11:39:44Z
2018-02
2020-02
info:eu-repo/semantics/article
0039-9140
http://hdl.handle.net/10259/4937
10.1016/j.talanta.2017.10.019
eng
Talanta. 2018, V. 178, p. 736-742
https://doi.org/10.1016/j.talanta.2017.10.019
info:eu-repo/grantAgreement/MINECO/CTQ2014-61914-EXP
info:eu-repo/grantAgreement/MINECO/CTQ2014-55583-R
info:eu-repo/grantAgreement/MINECO/TEC2014-51940-C2-2R
info:eu-repo/grantAgreement/MINECO/CTQ2015-71955-REDT
info:eu-repo/grantAgreement/JCyL/BU033-U16
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Elsevier