RT info:eu-repo/semantics/article
T1 Carbon nanostructured films modified by metal nanoparticles supported on filtering membranes for electroanalysis
A1 Páramo Martín, Ana Erica
A1 Palmero Díaz, Susana
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Carbon nanofibers electrodes
K1 Single-walled carbon nanotubes electrodes
K1 Bismuth nanoparticles
K1 Gold nanoparticles
K1 Electroanalysis
K1 Química analítica
K1 Chemistry, Analytic
AB 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.
PB Elsevier
SN 0039-9140
YR 2018
FD 2018-02
LK http://hdl.handle.net/10259/4937
UL http://hdl.handle.net/10259/4937
LA eng
NO Ministerio de Economía y Competitividad (CTQ2014-61914-EXP, CTQ2014-55583-R, TEC2014-51940-C2-2R, CTQ2015-71955-REDT) and Junta de Castilla y León (BU033-U16)
DS Repositorio Institucional de la Universidad de Burgos
RD 23-abr-2024