Premium
Electropolymerized Diphenylamine on Functionalized Multiwalled Carbon Nanotube Composite Film and Its Application to Develop a Multifunctional Biosensor
Author(s) -
Tsai TsungHsuan,
Ku ShuHao,
Chen ShenMing,
Lou BihShow,
Ali M. Ajmal,
AlHemaid Fahad M. A.
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300495
Subject(s) - materials science , diphenylamine , cyclic voltammetry , amperometry , detection limit , electrode , dielectric spectroscopy , carbon nanotube , biosensor , scanning electron microscope , nanotube , glassy carbon , hydrogen peroxide , chemical engineering , electrochemistry , analytical chemistry (journal) , nanotechnology , chemistry , composite material , organic chemistry , chromatography , engineering , metallurgy
Diphenylamine (DPA) monomers have been electropolymerized on the amino‐functionalized multiwalled carbon nanotube (AFCNT) composite film modified glassy carbon electrode (GCE) by cyclic voltammetry (CV). The surface morphology of PDPA‐AFCNT was studied using field‐emission scanning electron microscopy (FE‐SEM). The interfacial electron transfer phenomenon at the modified electrode was studied using electrochemical impedance spectroscopy (EIS). The PDPA‐AFCNT/GCE represented a multifunctional sensor and showed good electrocatalytic behavior towards the oxidation of catechol and the reduction of hydrogen peroxide. Rotating‐disk electrode technique was applied to detect catechol with a sensitivity of 1360 µA mM −1 cm −2 and a detection limit of 0.01 mM. Amperometric determination of hydrogen peroxide at the PDPA‐AFCNT film modified electrode results in a linear range from 10 to 800 µM, a sensitivity of 487.1 µA mM −1 cm −2 and detection limit of 1 µM. These results show that the nano‐composite film modified electrode can be utilized to develop a multifunctional sensor.