【摘 要】
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Multi-walled carbon nanombes (MWCNTs) were coated with ZnO by a hydrothermal method. The resulting nanocomposites were mixed with the Nation solution to form a
【机 构】
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College of Science
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Multi-walled carbon nanombes (MWCNTs) were coated with ZnO by a hydrothermal method. The resulting nanocomposites were mixed with the Nation 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/Nation 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 umol/L, respectively, which indicated that Hb had high affinity to H2O2.
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