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Título
Voltammetric sensor based on molecularly imprinted chitosan-carbon nanotubes decorated with gold nanoparticles nanocomposite deposited on boron-doped diamond electrodes for catechol detection
Autor
Año del Documento
2020
Editorial
MDPI
Descripción
Producción Científica
Documento Fuente
Materials, 2020, vol. 13, n. 3. 11 p.
Résumé
Phenolic compounds such as catechol are present in a wide variety of foods and beverages; they are of great importance due to their antioxidant properties. This research presents the development of a sensitive and biocompatible molecular imprinted sensor for the electrochemical detection of catechol, based on natural biopolymer-electroactive nanocomposites. Gold nanoparticle (AuNP)-decorated multiwalled carbon nanotubes (MWCNT) have been encapsulated in a polymeric chitosan (CS) matrix. This chitosan nanocomposite has been used to develop a molecular imprinted polymers (MIP) in the presence of catechol on a boron-doped diamond (BDD) electrode. The structure of the decorated MWCNT has been studied by TEM, whereas the characterization of the sensor surface has been imaged by AFM, demonstrating the satisfactory adsorption of the film and the adequate coverage of the decorated carbon nanotubes on the electrode surface. The electrochemical response of the sensor has been analyzed by cyclic voltammetry (CV) where excellent reproducibility and repeatability to catechol detection in the range of 0 to 1 mM has been found, with a detection limit of 3.7 × 10−5 M. Finally, the developed sensor was used to detect catechol in a real wine sample.
Materias Unesco
2210 Química Física
2303 Química Inorgánica
Palabras Clave
Molecular imprinted polymers
Polímeros molecularmente impresos
Electrochemical sensors
Sensores electroquímicos
Catechol
Catecol
Chitosan
Chitosán
ISSN
1996-1944
Revisión por pares
SI
Patrocinador
Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (projects RTI2018-097990-B-100 / BES-2016-077825)
Junta de Castilla y Leon - Fondo Europeo de Desarrollo Regional (project VA275P18)
Junta de Castilla y Leon - Fondo Europeo de Desarrollo Regional (project VA275P18)
Version del Editor
Propietario de los Derechos
© 2020 MDPI
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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