Citation: Yue-Li Wu, Qi-Wei Li, Xiao-Lu Zhang, Xiao Chen, Xue-Mei Wang. Glucose biosensor based on new carbon nanotube-gold-titania nano-composites modified glassy carbon electrode[J]. Chinese Chemical Letters, ;2013, 24(12): 1087-1090. shu

Glucose biosensor based on new carbon nanotube-gold-titania nano-composites modified glassy carbon electrode

Yue-Li Wu ^a,b ,
Qi-Wei Li ^b ,
Xiao-Lu Zhang ^b ,
Xiao Chen ^b ,
Xue-Mei Wang ^b,,

1.
a School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;
2.
b State Key Lab of Bioelectronics, Southeast University, Nanjing 210096, China

Corresponding author: Xue-Mei Wang,
Received Date: 20 May 2013
Available Online: 15 June 2013
Fund Project: Wegratefully acknowledge the support from National Key Basic Research Program (No. 2010CB732404) (No. 2010CB732404) National Natural Science Foundation of China (No. 21175020) (No. 21175020)

In this paper, a novel biosensor was prepared by immobilizing glucose oxidase (GOx) on carbon nanotube-gold-titania nanocomposites (CNT/Au/TiO₂) modified glassy carbon electrode (GCE). SEM was initially used to investigate the surface morphology of CNT/Au/TiO₂ nanocomposites modified 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/TiO₂ nanocomposites modified GCE. The observations demonstrated that the immobilized GOx could efficiently execute its bioelectrocatalytic activity for the oxidation of glucose. The biosensor exhibited a wider linearity range from 0.1 mmol L^-1 to 8 mmol L^-1 glucose with a detection limit of 0.077 mmol L^-1.
- Biosensor,
- Glucose oxidase,
- CNT/Au/TiO₂
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