Nafion/Thionine/Platinum Nanowires-Modified Electrode for Electrocatalyzing Glucose

Authors

Yu-ping LIN, Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, China;
You-xiu LIN, Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, China;
Qian ZHOU, Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, China;
Dian-ping TANG, Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou 350108, China;

Corresponding Author

Dian-ping TANG

Abstract

A new amperometric biosensor based on Nafion, thionine and latinum nanowires was developed for sensitive detection of glucose. Initially, positively charged thionine molecules were immobilized onto the surface of Nafion-modified glassy carbon electrode through the interaction between -SO₃^- and -NH₃⁺, and glucose oxidase was then assembled on the modified electrode by using platinum nanowires as the cross-linkage. The preparation process was characterized by using cyclic voltammetry. Two enzymatic biosensors modified with and without platinum nanowires were used for the detection of glucose, and the improved analytical properties were obtained with platinum nanowires. Experimental results indicated that the as-prepared biosensor exhibited good electrocatalytic response toward glucose in the dynamic range of 1.0 × 10^-5 ~ 6.0 × 10^-3 mol·L^-1 with a detection limit of 3.0 × 10^-6 mol·L^-1 at S/N =3. Moreover, the reproducibility and stability of the biosensor were acceptable.

Graphical Abstract

Keywords

glucose oxidase, platinum nanowires, thionine, biosensors, electrochemical catalysis

DOI Link

https://doi.org/10.13208/j.electrochem.140436

Publication Date

2014-12-28

Online Available Date

2014-07-07

Revised Date

2014-07-02

Received Date

2014-05-29

Recommended Citation

Yu-ping LIN, You-xiu LIN, Qian ZHOU, Dian-ping TANG. Nafion/Thionine/Platinum Nanowires-Modified Electrode for Electrocatalyzing Glucose[J]. Journal of Electrochemistry, 2014 , 20(6): 538-541.
DOI: 10.13208/j.electrochem.140436
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss6/7