Preparation of spinel nickel-cobalt oxide nanowrinkles/reduced graphene oxide hybrid for nonenzymatic glucose detection at physiological level

被引:80
作者
Ma, Guangran [1 ]
Yang, Min [1 ]
Li, Chenyi [1 ]
Tan, Haiyan [1 ]
Deng, Liang [1 ]
Xie, Shi [1 ]
Xu, Fugang [1 ]
Wang, Li [1 ]
Song, Yonghai [1 ]
机构
[1] Jiangxi Normal Univ, Coll Chem & Chem Engn, Minist Educ, Key Lab Funct Small Organ Mol, 99 Ziyang Rd, Nanchang 330022, Peoples R China
关键词
spinel nanocrystal; nickel cobalt oxide; glucose; electrochemical sensor; electrocatalysis; METAL-ORGANIC FRAMEWORK; ELECTROCHEMICAL SENSOR; NICO2O4; NANOSTRUCTURES; HYDROGEN-PEROXIDE; FACILE SYNTHESIS; ASCORBIC-ACID; PERFORMANCE; COMPOSITE; ELECTRODE; H2O2;
D O I
10.1016/j.electacta.2016.10.163
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Nickel-cobalt oxide nanowrinkles with spinel-type crystal structure supported on reduced graphene oxide (NiCo2O4 NWs-rGO) was prepared to develop a sensitive and stable nonenzymatic glucose sensor. The NiCo2O4 NWs-rGO hybrid were prepared by a facile one-pot hydrothermal reaction, and sequential calcination in air. The morphology, composition and crystal structure of the NiCo2O4 NWs-rGO hybrid were characterized by scanning electron microscope, transmission electron microscope, selected area electron diffraction, and energy-dispersive spectroscopy. The electrochemical behavior of the hybrid and its catalytic activity towards glucose oxidation were investigated by several electrochemical methods. Compared with single component NiO or Co3O4, spinel type NiCo2O4 NWs displayed higher catalysis towards glucose oxidation. Further integration of NiCo2O4 with graphene could reduce the overpotential and enhance the catalytic current due to the improved conductivity and dispersity of NiCo2O4. The NiCo2O4 NWs-rGO based glucose sensor showed a wide linear range of 0.005-8.6 mM, a low detection limit of 2 mu M (S/N =3), and an improved stability. A satisfactory recovery was also obtained for glucose detection in human serum at physiological level. Our results indicate rationally combine spinel type mixed metal oxide with graphene is a good alternative to fabricate advanced metal oxide based electrochemical sensors. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:545 / 553
页数:9
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