期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 143, 期 1, 页码 373-380出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.08.018
关键词
Prussian blue; Pt nanoparticles; Carbon nanotubes; H2O2; Electrochemical sensor
资金
- National Natural Science Foundation of China [90713022]
- Chinese Academy of Sciences [KJCX2, YWH09]
In this study, the fabrication of an efficient amperometric hydrogen peroxide sensor with favorable properties is presented. Prussian blue (PB) was catalytically synthesized by Pt nanoparticles (Pt-nano) from ferric ferricyanide aqueous solution to form PB@Pt-nano hybrid, and it was confirmed by transmission electron microscope (TEM) and optical spectra. The electrochemical behavior of PB@Pt-nano was highly improved through its integration with poly(diallyldimethylammonium chloride) modified carbon nanotubes (PCNTs). The obtained PB@Pt-nano/PCNTs composite was used to modify the glassy carbon (GC) electrode, developing an electrochemical sensor for detecting H2O2. In the optimized operational conditions (E=0.1 V, pH 2.0), the response time and detection limit (S/N = 3) of this sensor were determined to be below 2 s and 0.15 mu M, respectively. Compared with the PB@Pt-nano sensing system, the determination by the PB@Pt-nano/PCNTs sensor was much more improved, with a wider linear range, a lower limit of detection, and a higher sensitivity. Interference study and operational stability of the sensor were investigated, meanwhile, influence of the amount of PB@Pt-nano upon the sensor sensitivity was also discussed. (C) 2009 Elsevier B.V. All rights reserved.
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