Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 195, Issue -, Pages 165-170Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.01.043
Keywords
Gold nanoparticles; Graphene; Chitosan; Chemically modified electrode; Hydrogen peroxide; Direct electrochemistry
Funding
- National Natural Science Foundation of China [20905025]
- Hunan Provincial Natural Science Foundation of China [12JJ3015]
- Program for Excellent Talents in Hunan Normal University [ET12203]
- Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
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Gold nanoparticles (GNPs) were electrochemically deposited on the graphene and chitosan modified glassy carbon electrode and characterized by scanning electron microscope and cyclic voltammetry, respectively. A simple non-enzymatic H2O2 sensor was developed based on the direct electrochemistry of H2O2 in the presence of GNPs. Under the optimized conditions, the fabricated electrode displayed a linear response in the H2O2 concentration range from 5.0 mu M to 35 mM with a detection limit of 1.6 mu M estimated at a signal-to-noise ratio of 3. The proposed sensor presented some advantages including simple operation procedure, wide linear range, low detection limit, fast response time as well as good anti-interference performance, stability and reproducibility, which indicate it can act as a promising electrochemical platform for H2O2 detection. (C) 2014 Elsevier B.V. All rights reserved.
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