期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 157, 期 1, 页码 110-114出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.03.033
关键词
Graphene; Carbon paste electrode; Ascorbic acid; Sensor
资金
- National Natural Science Foundation of China [20775039, 21005043]
- Natural Science Foundation of Shandong Province of China [ZR2009BM031, Q2008B05]
- Science and Technology Project of Shandong Company
- China National Tobacco Corporation [KN172]
- First Institute of Oceanography, SOA [2010T04]
In present paper, the graphene doped carbon paste electrode (CPE) was firstly prepared with the addition of graphene into the carbon paste mixture. Compared with conventional CPE, an improved electrochemical response of graphene doped CPE toward the redox couple of Fe(CN)(6)(3-/4-) was demonstrated owing to the excellent electrical conductivity of graphene. The graphene doped CPE was further used for the successful determination of ascorbic acid (AA), and it showed an excellent electrocatalytic oxidation activity toward AA with a lower overvoltage, pronounced current response, and good sensitivity. Under the optimized experimental conditions, the proposed electrochemical AA sensor exhibited a rapid response to AA within 5s and a linear calibration plot ranged from 1.0 x 10(-7) to 1.06 x 10(-4) M was obtained with a detection limit of 7.0 x 10(-8) M. (C) 2011 Elsevier B.V. All rights reserved.
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