Electrocatalytic Oxidation and Determination of Nitrite at Multi-Walled Carbon Nanotubes Modified Electrode

Jianxiang Jin; Bo Xiao; Jinlong Yan; Benzhi Liu

doi:10.1166/jnn.2019.15765

Electrocatalytic Oxidation and Determination of Nitrite at Multi-Walled Carbon Nanotubes Modified Electrode

J Nanosci Nanotechnol. 2019 Apr 1;19(4):2124-2129. doi: 10.1166/jnn.2019.15765.

Authors

Jianxiang Jin¹, Bo Xiao¹, Jinlong Yan¹, Benzhi Liu¹

Affiliation

¹ School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu Province, 224051, China.

PMID: 30486955
DOI: 10.1166/jnn.2019.15765

Abstract

Electrocatalytic oxidation of nitrite at multi-walled carbon nanotubes (MWCNTs) modified electrode was investigated by using voltammetric techniques. The kinetic parameters such as diffusion coefficient (D), standard heterogeneous rate constant (k_s) and catalytic constant (k_h) were studied by chronocoulometry and chronoamperometry. The corresponding parameters for D, k_s, and k_h were caculated to be 3.56×10^-5 cm² s^-1, 6.29×10^-3 cm s^-1 and 7.02×10² M^-1 s^-1, respectively. The modified electrode was used for the determination of nitrite with a concentration range of 0.5 to 36 μM and a detection limit of 0.08 μM. The proposed method was successfully applied for the determination of nitrite in real samples of tap water and juice of pickled garlic.

Publication types

Research Support, Non-U.S. Gov't