One-step co-electrodeposition of graphene oxide doped poly(hydroxymethylated-3,4-ethylenedioxythiophene) film and its electrochemical studies of indole-3-acetic acid

A novel graphene oxide (GO) doped poly(hydroxymethylated-3,4-ethylenedioxythiophene) (PEDOTM) film has been achieved via one-step co-electrodeposition and utilized for electrochemical studies of indole-3-acetic acid (IAA). The incorporation of GO into PEDOTM film facilitated the electrocatalytic activity and exhibited a favorable interaction between the PEDOTM/GO film and the phytohormone during the oxidation of IAA. Under optimized conditions, differential pulse voltammetry and square wave voltammetry were used for the quantitative analysis of IAA, respectively, each exhibiting a wide linearity range from 0.6 mu mol L-1 to 10 mu mol L-1 and 0.05 mu mol L-1 to 40 mu mol L-1, good sensitivity with a low detection limit of 0.087 ilmol L-1 and 0.033 mu mol L-1, respectively, as well as good stability. With the notable advantages of a green, sensitive method, expeditious response and facile operation, the as-prepared PEDOTM/GO organic-inorganic composite film provides a promising platform for electrochemical studies of IAA. (C) 2014 Jing-Kun Xu and Yang-Ping Wen. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.