Electrochemical preparation of porous graphene and its electrochemical application in the simultaneous determination of hydroquinone, catechol, and resorcinol

In this paper, porous reduced graphene oxide (P-rGO) was synthesized by electrochemical reduction method using ZnO as template. P-rGO was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The electrochemical oxidation of hydroquinone (HQ), catechol (CC), and resorcinol (RC) was investigated using cyclic and differential pulse voltammetry at P-rGO modified electrode. P-rGO electrode exhibited high current sensitivity for these analytes compared to bare glassy carbon electrode (GCE) and electrochemically reduced graphene oxide (ERGO) modified electrodes, which is due to porous structure. In addition, three isomers can be simultaneously determined at P-rGO modified electrode by using differential pulse voltammetry without any separation step. The P-rGO also exhibits superior stability, reproducibility, and good anti-interference properties. Therefore, the remarkable electrochemical advantage of P-rGO makes it a promising material in electrochemical biosensing field. (C) 2015 Elsevier B.V. All rights reserved.