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

Shen, Zongxu, Gao, Wenyu, Li, Pei, Wang, Xiaofang, Zheng, Qing, Wu, Hao, Ma, Yuehui, Guan, Weijun, Wu, Songmei, Yu, Yu, Ding, Kejian
Talanta 2016 v.159 pp. 194-199
cathodes, cations, detection limit, electrochemistry, glassy carbon electrode, glucose, graphene, graphene oxide, nanocomposites, nanoparticles, nickel
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.