Electroactive polyurea/CNT composite-based electrode for detection of vitamin C
T. C. Huang, L. C. Yeh, G. H. Lai, F. Y. Lai, T. I. Yang, Y. J. Huang, A. Y. Lo, J. M. Yeh
Vol. 10., No.6., Pages 450-461, 2016
DOI: 10.3144/expresspolymlett.2016.43
DOI: 10.3144/expresspolymlett.2016.43
Corresponding author: J. M. Yeh 
GRAPHICAL ABSTRACT
ABSTRACT
The electrocatalytic oxidation of vitamin C at carbon paste electrode (CPE) modified with amino-functionalized multiwalled carbon nanotube/electroactive polyurea (AF-MWCNT/EPU) composite was investigated. We have synthesized novel electroactive polyurea composites containing MWCNTs functionalized with 4-aminobenzoyl groups by an oxidative coupling polymerization. Ultraviolet-Visible spectra and cyclic voltammetry studies confirmed the occurrence of efficient interaction between AF-MWCNT and EPU graft. Moreover, the electrocatalytic activity of vitamin C oxidation by utilizing aniline containing composites was evaluated, showing that the intrinsic electroactivity of AF-MWCNT/EPU-CPE had great potential application for detection of vitamin C. The detection limit and sensitivity of this sensor was 1.2 μM and 35.3 μA•mM–1, respectively.
