2026-06-06T07:17:47Zhttps://riubu.ubu.es/oai/request

oai: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