期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 15, 期 6, 页码 4682-4687出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2015.9700
关键词
Helical Carbon Nanofibers; Hemoglobin; Biosensor; Hydrogen Peroxide
类别
资金
- National Natural Science Foundation of China [20905010, 21005034]
- Jiangsu Provincial Natural Science Foundation [BK 20131191]
- Suzhou Science and technology project [SYN201302]
- Hebei Provincial Natural Science Foundation [B2011205079]
- Hebei Province Department of Education Fund [20052022]
A combined sol-gel/hydrogen reduction method has been developed for the mass production of helical carbon nanofibers (HCNFs) by the pyrolysis of acetylene at 425 degrees C in the presence of NiO nanoparticles. The synthesized HCNFs were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The helical-structured carbon nanofibers have a large specific surface area and excellent biocompatibility. A novel enzymatic hydrogen peroxide sensor was then successfully fabricated based on the nanocomposites containing HCNFs and gold nanoparticles (AuNPs). The results indicated that the Au/HCNFs nanoconnposites exhibited excellent electrocatalytic activity to the reduction of H2O2, offering a wide linear range from 1.0 mu M to 3157 mu M with a detection limit as low as 0.46 AM. The apparent Michaelis-Menten constant of the biosensor was 0.61 mM. The as-fabricated biosensor showed a rapid and sensitive amperometric response to hydrogen peroxide with acceptable preparation reproducibility and excellent stability. Because of their low cost and high stability, these novel HCNFs represent seem to be a kind of promising biomaterial and may find wide new applications in scopes such as biocatalysis, immunoassay, environmental monitoring and so on.
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