A Novel Nitrite Sensing Electrode Based on Au/Fe₃O₄/Chitosan Nanocomposite

Authors

Ying DONG, Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China;
Yong WANG, Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China;
Huan-huan XING, Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China;
Jian-ying QU, Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China;Follow

Corresponding Author

Jian-ying QU(lilyqujy@yahoo.com.cn)

Abstract

A novel nitrite sensing electrode based on gold nanoparticles and iron oxides (Fe₃O₄) magnetic nanoparticles was fabricated with chitosan as the protective film on glassy carbon matrix. Experiment results showed that the sensing electrode exhibited good electrocatalytic activity toward oxidation of nitrite, and the oxidation peak current increased linearly with the concentration of nitrite varying from 5.0×10^-6 to 2.0×10^-3 mol·L^-1 (R=0.9996) with a detection limit of 7.1×10^-7 mol·L^-1 (S/N=3). The sensing electrode exhibited good sensitivity, selectivity and repeatability.

Graphical Abstract

Keywords

Fe3O4 magnetic nanoparticles, gold nanoparticles, nitrite

DOI Link

https://doi.org/10.13208/j.electrochem.140620

Publication Date

2015-02-28

Online Available Date

2014-09-15

Revised Date

2014-08-30

Received Date

2014-06-20

Recommended Citation

Ying DONG, Yong WANG, Huan-huan XING, Jian-ying QU. A Novel Nitrite Sensing Electrode Based on Au/Fe₃O₄/Chitosan Nanocomposite[J]. Journal of Electrochemistry, 2015 , 21(1): 85-90.
DOI: 10.13208/j.electrochem.140620
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss1/13