期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 3, 页码 881-887出版社
SPRINGER
DOI: 10.1007/s10008-012-1939-5
关键词
Direct electrochemistry; Nanocomposite; Sensitive detection; Hydrogen peroxide
资金
- 973 Program [2013CB932902]
- National Natural Science Foundation of China [21173042]
- National Natural Science Foundation of Jiangsu [BK201123694]
- National Natural Science Foundation of Hebei [B2012402006]
- Jiangsu Key Laboratory of Environmental Material and Environmental Engineering [JHCG201012]
- Foundation of Southeast of University [3212001102, 3212002205]
Graphene/Fe3O4 nanocomposite was prepared for the immobilization of hemoglobin (Hb) to improve the electron transfer between Hb and glass carbon electrode (GCE). The characterization of nanocomposites was described by transmission electron microscopy, Fourier transform infrared, Raman spectroscopy, and X-ray photoelectron spectroscopy, respectively. The electrochemistry of Hb on the graphene/Fe3O4-based GCE was investigated by cyclic voltammetry and amperometric measurement. The modified electrode showed a wide linear range from 0.25 mu mol/L to 1.7 mmol/L with a correlation coefficient of 0.9967. The detection limit of the H2O2 biosensor was estimated at 6.0 x 10(-6) mol/L at a signal-to-noise ratio of 3.
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