Highly sensitive nonenzymatic glucose sensor based on nickel nanoparticle-attapulgite-reduced graphene oxide-modified glassy carbon electrode

In this article, a fast and sensitive nonenzymatic glucose sensor is reported utilizing a glassy carbon electrode modified by synthesizing nanocomposites of nickel nanoparticle-attapulgite-reduced graphene oxide (Ni NPs/ATP/RGO). A facile one-step electrochemical co-deposition approach is adopted to synthesize Ni NPs-ATP-RGO nanocomposites via electrochemical reduction of mixed precursor solution containing graphene oxide (GO), attapulgite (ATP) and nickel cations (Ni2+) at the cathode potentials. This strategy results in simultaneous depositions of ATP, cathodic reduction of Ni2+ into nickel nano particles under acidic conditions, and in situ reduction of GO. The as-prepared NiNPs/ATP/RGO-based glucose sensor exhibits outstanding performance for enzymeless glucose sensing with sensitivity (1414.4 mu A mM(-1) cm(-2)), linear range (1-710 mu M) and detection limit (0.37 mu M). What is more, the sensor has excellent stability and selectivity against common interferences in real sample. (C) 2016 Elsevier B.V. All rights reserved.