期刊
BIOSENSORS & BIOELECTRONICS
卷 53, 期 -, 页码 200-206出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2013.09.059
关键词
Co3O4/PbO2; Carbon cloth; Nanorod array; Non-enzymatic sensor; Glucose
类别
资金
- National Research Foundation for the Doctoral Program of Higher Education of China [20120131110009]
- National Science Foundation of China [21175059, 21373129]
A novel electrochemical sensor for the detection of glucose was constructed based on the use of Co3O4/PbO2 core-shell nanorod arrays as electrocatalysts. In this paper the Co3O4/PbO2 core-shell nanorod arrays grow directly on a flexible carbon cloth substrate by the combination of hydrothermal synthesis and electrochemical deposition methods. The as-prepared hierarchical nanocomposites show the structural characteristics of nanowire core and nanoparticle shell. The carbon cloth-supported Co3O4/PbO2 nanorod array electrode exhibits higher sensitivity (460.3 mu A mM(-1) cm(-2) in the range from 5 mu M to 1.2 mM) and lower detection limit (0.31 mu M (S/N=3)) than the carbon cloth-supported Co3O4 nanowire array electrode. Both the three-dimensional network of carbon cloth substrate and the hierarchical nanostructure of binary Co3O4/PbO2 composites make such an electrode have high electrocatalytic activity towards the glucose oxidation. Due to the excellent sensitivity, repeatability and anti-interference ability, the carbon cloth-supported Co3O4/PbO2 nanorod arrays will be the promising materials for fabricating practical non-enzymatic glucose sensors. (C) 2013 Elsevier B.V. All rights reserved.
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