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In this paper,a novel biosensor was prepared by immobilizing glucose oxidase(GOx)on carbon nanotube–gold–titania nanocomposites(CNT/Au/TiO2)modifed glassy carbon electrode(GCE).SEM was initially used to investigate the surface morphology of CNT/Au/TiO2nanocomposites modifed GCE,indicating the formation of the nano-porous structure which could readily facilitate the attachment of GOx on the electrode surface.Cyclic voltammogram(CV)and electrochemical impedance spectrum(EIS)were further utilized to explore relevant electrochemical activity on CNT/Au/TiO2nanocomposites modifed GCE.The observations demonstrated that the immobilized GOx could effciently execute its bioelectrocatalytic activity for the oxidation of glucose.The biosensor exhibited a wider linearity range from 0.1 mmol Là1to 8 mmol Là1glucose with a detection limit of 0.077 mmol Là-1.
In this paper, a novel biosensor was prepared by immobilizing glucose oxidase (GOx) on carbon nanotube-gold-titania nanocomposites (CNT / Au / TiO2) modifed glassy carbon electrode / Au / TiO2nanocomposites modifed GCE, indicating the formation of the nano-porous structure which could afford facilitate the attachment of GOx on the electrode surface. Cyclic voltammogram (CV) and electrochemical impedance spectra (EIS) were further utilized to explore relevant electrochemical activity on CNT / Au / TiO2nanocomposites modifed GCE.The results demonstrated that the immobilized GOx could effciently execute its bioelectrocatalytic activity for the oxidation of glucose. The biosensor exhibited a wider linearity range from 0.1 mmol Là1to 8 mmol Là1 glucose with a detection limit of 0.077 mmol Là- 1.