期刊
BIOSENSORS & BIOELECTRONICS
卷 26, 期 8, 页码 3500-3504出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2011.01.033
关键词
Nonenzymatic sensor; Glucose; Graphene; Pd nanoparticles
类别
资金
- National Natural Science Foundation of China [21005047, J0830415, 20975034]
- Excellent Middle-age and Young Scientists Research Award Foundation of Shandong Province [BS2010SW012]
- 973 National Key Basic Research Program of China [2007CB310500, 2011CB911000]
- Program for Changjiang Scholars and Innovative Research Team in University
- Ministry of Education of China [NCET-07-0272]
A nonenzymatic electrochemical biosensor was developed for the detection of glucose based on an electrode modified with palladium nanoparticles (PdNPs)-functioned graphene (nafion-graphene). The palladium nanoparticle-graphene nanohybrids were synthesized using an in situ reduction process. Nafion-graphene was first assembled onto an electrode to chemically adsorb Pd2+. And Pd2+ was subsequently reduced by hydrazine hydrate to form PdNPs in situ. Such a PdNPs-graphene nanohybrids-based electrode shows a very high electrochemical activity for electrocatalytic oxidation of glucose in alkaline medium. The proposed biosensor can be applied to the quantification of glucose with a wide linear range covering from 10 mu M to 5 mM (R = 0.998) with a low detection limit of 1 mu M. The experiment results also showed that the sensor exhibits good reproducibility and long-term stability, as well as high selectivity with no interference from other potential competing species. (C) 2011 Elsevier B.V. All rights reserved.
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