title: Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite.
abstract: Ni/NiO nanoflower modified reduced graphene oxide (rGO) nanocomposite (Ni/NiO-rGO) was introduced to screen printed electrode (SPE) for the construction of a nonenzymatic electrochemical glucose biosensor. The Ni/NiO-rGO nanocomposite was synthesized by an in situ reduction process. Graphene oxide (GO) hybrid Nafion sheets first chemical adsorbed Ni ions and assembled on the SPE. Subsequently, GO and Ni ions were reduced by hydrazine hydrate. The electrochemical properties of such a Ni/NiO-rGO modified SPE were carefully investigated. It showed a high activity for electrocatalytic oxidation of glucose in alkaline medium. The proposed nonenzymatic sensor can be utilized for quantification of glucose with a wide linear range from 29.9 μM to 6.44 mM (R = 0.9937) with a low detection limit of 1.8 μM (S/N = 3) and a high sensitivity of 1997 μA/mM∙cm-2. It also exhibited good reproducibility as well as high selectivity.
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. Zhangxiaohui@crrcgc.cc.|CRRC Institute, Beijing 100070, China. Zhangxiaohui@crrcgc.cc.
authors: Xiaohui
authors: X
authors: Zhang
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. zhangzheng@ustb.edu.cn.
authors: Zheng
authors: Z
authors: Zhang
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. liao@ustb.edu.cn.
authors: Qingliang
authors: Q
authors: Liao
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. ruodehaner123@126.com.
authors: Shuo
authors: S
authors: Liu
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. zhuokang@ustb.edu.cn.
authors: Zhuo
authors: Z
authors: Kang
authors: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China. yuezhang@ustb.edu.cn.|Beijing Municipal Key Laboratory for Advanced Energy Materials and Technologies, Beijing 100083, China. yuezhang@ustb.edu.cn.
authors: Yue
authors: Y
authors: Zhang
keywords: biosensor; glucose; graphene; in situ; nonenzymatic