A novel hydrogen peroxide(H2O2)biosensor was prepared.First,zirconium dioxide(ZrO2)were solubilized in the aqueous solution of a biopolymer chitosan(CS)and the mutlicarbon nanotubes(MWNTs)was introduced into the ZrO2-...A novel hydrogen peroxide(H2O2)biosensor was prepared.First,zirconium dioxide(ZrO2)were solubilized in the aqueous solution of a biopolymer chitosan(CS)and the mutlicarbon nanotubes(MWNTs)was introduced into the ZrO2-CS solution to get a ZrO2-CS-MWNTs composite.Then the ZrO2-CS-MWNTs composite was immobilized onto the surface of the glass carbon electrode(GCE).Subquently,a stable nano-Au film was electrodeposited on the ZrO2-CS-MWNTs modified electrode at a constant potential.Finally,horseradish peroxidase(HRP)was immobilized onto the nano-Au layer to obtain the HRP/nano-Au/ ZrO2-CS-MWNTs /GCE electrode.The results showed that the biosensor exhibited well reduction ability for hydrogen peroxide with high sensitivity and fastresponse time resulting from.The biosensor displayed a rapid response to H2O2 and the linear range of the biosensor was from 7.80×10-6 to 9.26×10-3 mol/L with the detection limit of 2.8×10-6 mol/L(S/N=3).In addition,the biosensor showed fast response,high sensitivity,good stability and reproducibility.展开更多
文摘A novel hydrogen peroxide(H2O2)biosensor was prepared.First,zirconium dioxide(ZrO2)were solubilized in the aqueous solution of a biopolymer chitosan(CS)and the mutlicarbon nanotubes(MWNTs)was introduced into the ZrO2-CS solution to get a ZrO2-CS-MWNTs composite.Then the ZrO2-CS-MWNTs composite was immobilized onto the surface of the glass carbon electrode(GCE).Subquently,a stable nano-Au film was electrodeposited on the ZrO2-CS-MWNTs modified electrode at a constant potential.Finally,horseradish peroxidase(HRP)was immobilized onto the nano-Au layer to obtain the HRP/nano-Au/ ZrO2-CS-MWNTs /GCE electrode.The results showed that the biosensor exhibited well reduction ability for hydrogen peroxide with high sensitivity and fastresponse time resulting from.The biosensor displayed a rapid response to H2O2 and the linear range of the biosensor was from 7.80×10-6 to 9.26×10-3 mol/L with the detection limit of 2.8×10-6 mol/L(S/N=3).In addition,the biosensor showed fast response,high sensitivity,good stability and reproducibility.
