eXPRESS Polymer Letters (Jun 2016)

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

DOI
https://doi.org/10.3144/expresspolymlett.2016.43
Journal volume & issue
Vol. 10, no. 6
pp. 450 – 461

Abstract

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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.

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