2024-03-29T08:26:55Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/409532021-06-23T11:55:53Zcom_10324_1186com_10324_931com_10324_894col_10324_1404
00925njm 22002777a 4500
dc
Salvo Comino, Coral
author
Rassas, Ilhem
author
Minot, Sylvain
author
Bessueille, Francois
author
Arab, Madjid
author
Chevallier, Virginie
author
Rodríguez Méndez, María Luz
author
Errachid, Abdelhamid
author
Jaffrezic Renault, Nicole
author
2020
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.
Materials, 2020, vol. 13, n. 3. 11 p.
1996-1944
http://uvadoc.uva.es/handle/10324/40953
10.3390/ma13030688
Voltammetric sensor based on molecularly imprinted chitosan-carbon nanotubes decorated with gold nanoparticles nanocomposite deposited on boron-doped diamond electrodes for catechol detection