RT Journal Article
T1 Polyaniline Nanofibers-Embedded Gold Nanoparticles Obtained by Template-Free Procedure with Immobilization Prospects
A1 Crespo-Rosa, Joaquin Rafael
A1 Sierra-Padilla, Alfonso
A1 Garcia-Guzman, Juan Jose
A1 Lopez-Iglesias, David
A1 Bellido-Milla, Dolores
A1 Palacios-Santander, Jose Maria
A1 Cubillana-Aguilera, Laura
K1 conducting polymers
K1 polyaniline nanofibers
K1 conducting polymers-gold nanoparticles nanocomposite
K1 high-energy ultrasound
K1 Sonogel-Carbon
K1 electrochemical biosensors
K1 Direct electron-transfer
K1 Sonogel-carbon material
K1 Glucose-oxidase
K1 Conducting polymer
K1 Electrochemical properties
K1 Electrocatalytic activity
K1 Hydrogen-peroxide
K1 Composites
K1 Nanotubes
K1 Nanostructure
AB In this work, template-free nanostructured conducting polymers (nCPs)-embedded gold nanoparticles (AuNPs) from aniline, thiophene and 3,4-ethylenedioxythiophene have been prepared via a one-pot sonochemical method. The synthesis of the nanocomposite (nCPs-AuNPs) was achieved in a short period of time (5-10 min), by applying high-energy ultrasound to an aqueous mixture of a CP precursor monomer and KAuCl4, in the presence of LiClO4 as dopant. The synthesis process is simpler, greener and faster in comparison to other procedures reported in the literature. Remarkably, bulk quantities of doped polyaniline PANI-AuNPs nanofibers were obtained. Subsequently, they were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR), as well as by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). PANI-AuNPs nanofibers were also employed as immobilization matrix for a benchmark enzyme, glucose oxidase (GOX). Finally, glucose was determined in real samples of white and red wines by using the so-obtained GOX-PANI-AuNPs/Sonogel-Carbon biosensor, providing outstanding recoveries (99.54%). This work may offer important insights into the synthesis of nanostructured conducting polymers and also stimulates the exploration of the applications of these nanocomposites, especially in research fields such as (bio)sensors, catalysis and composite materials.
PB Mdpi
YR 2021
FD 2021-12-01
LK https://hdl.handle.net/10668/25248
UL https://hdl.handle.net/10668/25248
LA en
DS RISalud
RD Apr 17, 2025