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

Publication date: 1 October 2016
Source:Talanta, Volume 159
Author(s): Zongxu Shen, Wenyu Gao, Pei Li, Xiaofang Wang, Qing Zheng, Hao Wu, Yuehui Ma, Weijun Guan, Songmei Wu, Yu Yu, Kejian Ding
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 nanoparticles 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 μAmM⁻¹cm⁻²), linear range (1–710μM) and detection limit (0.37μM). What is more, the sensor has excellent stability and selectivity against common interferences in real sample.

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