Artículo
Tubular-structured polypyrrole electrodes decorated with gold nanoparticles for electrochemical sensing
Gutiérrez Pineda, Eduart Andrés
; Rodriguez Presa, Maria Jose
; Gervasi, Claudio; Bolzán, Agustín Eduardo
Fecha de publicación:
01/03/2018
Editorial:
Elsevier Science
Revista:
Journal of Electroanalytical Chemistry
ISSN:
1572-6657
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The electrosynthesis and characterisation of polypyrrole(PPy) films with a micro-tubular structure decorated with gold nanoparticles is described. The PPy films were characterised by means of voltammetric and electrochemical impedance spectroscopy measurements. The tubular structure of the PPy films were obtained under potentiostatic conditions in freshly prepared sodium salicylate solutions. Voltammetric response of the PPy films shows that its behavior turns more reversible as the electropolymerization charge of the film increases. SEM images show the appearance of the tubular structure for an electrodeposition time higher than 2 min. The tubular-structured PPy film showed an rms of ca. 600 nm as determined from AFM imaging. These PPy films were subsequently decorated with gold nanoparticles obtained by a double step potentiostatic electrodeposition routine that allowed fine control of deposit characteristics. Analysis of deposits was performed by means of SEM and AFM nanoscopy. Statistical analysis of particles size distribution show that the maximum value appeared for 60 nm, but a significant amount of particles between 100–200 nm were also observed. The sensing capability of these composite electrodes was tested for the determination of hydroxylamine, nitrite and their mixture in solutions of different pH. Results showed a successful route of synthesis of a nanocomposite electrode with promising applications in electrochemical sensing.
Palabras clave:
ELECTRODEPOSITION
,
GOLD NANOPARTICLES
,
HYDROXYLAMINE
,
NITRITE
,
POLYPYRROLE
,
SENSORS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Gutiérrez Pineda, Eduart Andrés; Rodriguez Presa, Maria Jose; Gervasi, Claudio; Bolzán, Agustín Eduardo; Tubular-structured polypyrrole electrodes decorated with gold nanoparticles for electrochemical sensing; Elsevier Science; Journal of Electroanalytical Chemistry; 812; 01-3-2018; 28-36
Compartir
Altmétricas