Detecion of nirite by Nano-ZnO modified electrodes

Abstract

Abstract: A simple and sensitive electrochemical analysis method for nirite detection based on electrochemical deposition nano-ZnO film on ITO electrodes was constructed. The ITO electrode modified by nano-ZnO was studied and characterized by electrochemical method. Under the optimum conditions, the differential pulse voltammetry (DPV) responses of ITO electrode modified by nano-ZnO toward NO₂^- was evaluated in a good linear range from 3.33×10^-8 to 3.33×10^-6 M, with a detection limit of 1.0×10^-7 M at S/N=3. The prepared electrochemical method exhibited advantages of simple preparation, easy surface renewal, better reproducibility and satisfactory stability. This modified electrode can be successfully applied to the determination of NO₂^- in a real sample without complex pretreatment.

Key words: modified electrode, ZnO/ITO, cyclic voltammetry, nitrite

CLC Number:

O657.14

Fu Mingqiuhao, Wan Rongtai, He Zhangyu, Lin Zhongxia, Yang Haizheng. Detecion of nirite by Nano-ZnO modified electrodes[J]. JOURNAL OF QUJING NORMAL UNIVERSITY, 2020, 39(3): 47-51.

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