▎ 摘　　要

Hydroquinone sensors have been shown useful for a range of applications from pharmaceutical and cosmetic industry, to environmental monitoring. In this paper, we report a facile synthesize polyaniline (PANi) nanofiber incorporated into iron oxide-reduced graphene oxide (Fe2O3-rGO) and its application to construct an electrochemical hydroquinone (HQ) sensor. The ternary composite material (PANi-Fe2O3-rGO) is characterized by means of field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and voltammetric techniques. The as-prepared ternary composite further employed as novel sensing material for fabricating the hydroquinone (HQ) sensor. Compared with bare PANi and binary composite (Fe2O3-rGO), the PANi-Fe2O3-rGO ternary composite showed enhanced electrocatalytic activity to HQ oxidation. The oxidation current of HQ is linear to its concentration in the range of 1.0 x 10(-7)-5.5 x 10(-4) M and the detection limit is found to be 6.0 x 10(-8) M. The obtained detection limit and linear range for PANi-Fe2O3-rGO composite is very much comparable to the recent literature values. In addition, the fabricated sensor showed an excellent anti-interference ability against electroactive species and metal ions and proved to be useful for the estimation of the HQ in tab water with satisfactory recovery. (C) 2014 Elsevier B.V. All rights reserved.