Direct electrochemistry of glucose oxidase based on Nafion-Graphene-GOD modified gold electrode and application to glucose detection

作者：Hui, Jianing; Cui, Jiewu; Xu, Guangqing; Adeloju, Samuel B; Wu, Yucheng^*

来源：Materials Letters, 2013, 108: 88-91.

DOI：10.1016/j.matlet.2013.06.097

• Direct electrochemistry
• Carbon materials
• Glucose oxidase
• Biosensor
• FTIR

Direct electrochemistry of glucose oxidase (GOD) based on Nafion-Graphene-GOD modified gold disk electrode (GE) was studied in this work. Immobilized GOD on graphene protected by nafion film exhibited good bioactivity, stability and apparent electron transfer rate constant (k(s)) 1.96 s(-1). Cyclic voltammetric results of the electrode showed a pair of well-defined and quasi-reversible redox peaks, suggesting the direct electron transfer between GOD and the electrode surface. The proposed biosensor exhibited a wider linear response to glucose concentrations between 2 and 14 mM with a detection limit of 0.04 mM and a higher sensitivity (21.9 mu A mM(-1) cm(-2)) compared with other nanostructured supports.

• 出版日期2013-10-1
• 单位合肥工业大学