RT info:eu-repo/semantics/article
T1 Polymeric foams as the matrix of voltammetric sensors for the detection of catechol, hydroquinone, and their mixtures
A1 Fernández Blanco, C.
A1 Múgica Izaguirre, Mikel
A1 Rodríguez Pérez, Miguel Ángel
A1 García Cabezón, Ana Cristina
A1 Rodríguez Méndez, María Luz
K1 Polymeric foams
K1 Espumas poliméricas
K1 Voltammetric sensors
K1 Sensores voltamétricos
K1 Catechol
K1 Catecol
K1 Hydroquinone
K1 Hidroquinona
AB Porous electrodes based on polymethylmethacrylate and graphite foams (PMMA_G_F) have been developed and characterized. Such devices have been successfully used as voltammetric sensors to analyze catechol, hydroquinone, and their mixtures. The presence of pores induces important changes in the oxidation/reduction mechanism of catechol and hydroquinone with respect to the sensing properties observed in nonfoamed PMMA_graphite electrodes (PMMA_G). The electropolymerization processes of catechol or hydroquinone at the electrode surface observed using PMMA_G do not occur at the surface of the foamed PMM_G_F. In addition, the limits of detection observed in foamed electrodes are one order of magnitude lower than the observed in the nonfoamed electrodes. Moreover, foamed electrodes can be used to detect simultaneously both isomers and a remarkable increase in the electrocatalytic properties shown by the foamed samples, produces a decrease in the oxidation potential peak of catechol in presence of hydroquinone, from +0.7 V to +0.3 V. Peak currents increased linearly with concentration of catechol in presence of hydroquinone over the range of 0.37·10−3 M to 1.69·10−3 M with a limit of detection (LOD) of 0.27 mM. These effects demonstrate the advantages obtained by increasing the active surface by means of porous structures.
PB Hindawi
SN 1687-725X
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/40959
UL http://uvadoc.uva.es/handle/10324/40959
LA eng
NO Journal of Sensors, 2018, vol. 2018. 9 p.
NO Producción Científica
DS UVaDOC
RD 27-abr-2024