Sensitive electrochemical sensing of acetaminophen and hydroquinone over single-pot synthesized stabilizer free Ag/Ag-oxide-graphene nanocomposites

A single-step, one-pot synthetic approach for decorating graphene with nanodimensional silver under mild, stabilizer free and eco-green reducing conditions is presented. The synthesized nanocomposites were adequately characterized for their chemical state through UV vis spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and electrochemical technique. The synthesized nanocomposite depicts excellent electrochemical stability and promising electrocatalytic and elecfroanalytic activity as demonstrated by the estimated sensitivity parameter (1,), of 18.48 and 12.35 (As-1/2 V-1/2 M-1 cm(-2)) for acetaminophen and hydroquinone respectively. Very low detection limits of 0.022 mu M and 0.004 mu M with very high sensitivities of 20,153 mu AM(-1) cm(-2) and 13,942.31 mu AM(-1) cm(-2) for acetaminophen and H(2)Q respectively were estimated. (C) 2016 Elsevier B.V. All rights reserved.