引用本文:
Wei Ma, Wei Song, Dan Bi Tian. ZnO-MWCNTs/Nafion inorganic-organic composite film: Preparation and application in bioelectrochemistry of hemoglobin[J]. Chinese Chemical Letters,
2009, 20(3): 358-361.
doi:
10.1016/j.cclet.2008.10.025
Citation: Wei Ma, Wei Song, Dan Bi Tian. ZnO-MWCNTs/Nafion inorganic-organic composite film: Preparation and application in bioelectrochemistry of hemoglobin[J]. Chinese Chemical Letters, 2009, 20(3): 358-361. doi: 10.1016/j.cclet.2008.10.025
Citation: Wei Ma, Wei Song, Dan Bi Tian. ZnO-MWCNTs/Nafion inorganic-organic composite film: Preparation and application in bioelectrochemistry of hemoglobin[J]. Chinese Chemical Letters, 2009, 20(3): 358-361. doi: 10.1016/j.cclet.2008.10.025
ZnO-MWCNTs/Nafion inorganic-organic composite film: Preparation and application in bioelectrochemistry of hemoglobin
摘要:
Multi-walled carbon nanotubes (MWCNTs) were coated with ZnO by a hydrothermal method. The resulting nanocomposites were mixed with the Nafion solution to form a composite matrix for the fabrication of hemoglobin (Hb) biosensor. To prevent the leak of Hb molecules of the biosensor, silica sol-gel film was coated on the surface of the Hb/ZnO-MWCNTs/Nafion electrode. The silica sol-gel/Hb/ZnO-MWCNTs/Nafion film exhibited a pair of well-defined, quasi-reversible redox peaks. This biosensor showed excellent electrocatalytic activity to H2O2. The sensitivity and apparent Michaelis-Menten constant of this Hb biosensor to H2O2 were 1.31 A/(M cm2) and 82.8 μmol/L, respectively, which indicated that Hb had high affinity to H2O2.
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关键词:
- Hemoglobin
- / ZnO
- / Multi-walled carbon nanotubes
- / Nafion
- / Bioelectrochemistry
English
ZnO-MWCNTs/Nafion inorganic-organic composite film: Preparation and application in bioelectrochemistry of hemoglobin
Abstract:
Multi-walled carbon nanotubes (MWCNTs) were coated with ZnO by a hydrothermal method. The resulting nanocomposites were mixed with the Nafion solution to form a composite matrix for the fabrication of hemoglobin (Hb) biosensor. To prevent the leak of Hb molecules of the biosensor, silica sol-gel film was coated on the surface of the Hb/ZnO-MWCNTs/Nafion electrode. The silica sol-gel/Hb/ZnO-MWCNTs/Nafion film exhibited a pair of well-defined, quasi-reversible redox peaks. This biosensor showed excellent electrocatalytic activity to H2O2. The sensitivity and apparent Michaelis-Menten constant of this Hb biosensor to H2O2 were 1.31 A/(M cm2) and 82.8 μmol/L, respectively, which indicated that Hb had high affinity to H2O2.
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Key words:
- Hemoglobin
- / ZnO
- / Multi-walled carbon nanotubes
- / Nafion
- / Bioelectrochemistry
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