A novel non-enzymatic H2O2 sensor using ZnMn2O4 microspheres modified glassy carbon electrode

Yuanyuan Li; Li Tang; Dongmei Deng; Jinhong Ye; Zhenyu Wu; Jinhua Wang; Liqiang Luo

doi:10.1016/j.colsurfb.2019.04.008

A novel non-enzymatic H₂O₂ sensor using ZnMn₂O₄ microspheres modified glassy carbon electrode

Colloids Surf B Biointerfaces. 2019 Jul 1:179:293-298. doi: 10.1016/j.colsurfb.2019.04.008. Epub 2019 Apr 4.

Authors

Yuanyuan Li¹, Li Tang², Dongmei Deng³, Jinhong Ye², Zhenyu Wu², Jinhua Wang⁴, Liqiang Luo⁵

Affiliations

¹ School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; College of Sciences, Shanghai University, Shanghai, 200444, PR China.
² College of Sciences, Shanghai University, Shanghai, 200444, PR China.
³ College of Sciences, Shanghai University, Shanghai, 200444, PR China. Electronic address: dmdeng@shu.edu.cn.
⁴ School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China. Electronic address: jinhuawang@staff.shu.edu.cn.
⁵ College of Sciences, Shanghai University, Shanghai, 200444, PR China. Electronic address: luck@shu.edu.cn.

PMID: 30981064
DOI: 10.1016/j.colsurfb.2019.04.008

Abstract

With a facile solvothermal technique, ZnMn₂O₄ microspheres were synthesized in this work, which were used as enzyme mimics for the electrocatalytic reduction of H₂O₂. The morphology, crystal phase and structure of the ZnMn₂O₄ microspheres underwent characterization under X-ray diffraction spectroscopy, Raman spectroscopy, energy-dispersive spectroscopy, and scanning electron microscopy. The synthesized ZnMn₂O₄ microspheres showed an average diameter of 2 μm with great crystallinity, and exhibited excellent catalytical activity towards H₂O₂ electroreduction in alkaline media. The glassy carbon electrode modiﬁed by ZnMn₂O₄ microspheres showed a linear amperometric response for H₂O₂ in a wide concentration range of 0.02 ˜ 15 mM with detection limit of 0.13 μM under the optimized conditions. Besides, the sensor proposed here was successfully used to determine H₂O₂ in milk, suggesting that ZnMn₂O₄ microspheres can be used for non-enzymatic electrochemical sensor applications.

Keywords: Electrochemical sensor; Hydrogen peroxide; ZnMn(2)O(4) microspheres.

MeSH terms

Animals
Carbon / chemistry*
Catalysis
Electrochemical Techniques
Electrodes
Glass / chemistry*
Hydrogen Peroxide / analysis*
Microspheres*
Milk / chemistry
Spectrum Analysis, Raman
X-Ray Diffraction

Substances

Carbon
Hydrogen Peroxide