Issue 6, 2020, Issue in Progress

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

Abstract

A nickel oxide (NiO) thin film was successfully prepared on Ni foil via a sol–gel method and a reduced state nickel oxide (r-NiO) thin film was obtained by etching NiO with hydrazine hydrate solution. Structure characterization through X-ray diffraction and scanning electron microscopy revealed the growth of nanostructure films on the surface of nickel foil. Cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy were used to assess the performance of the two films. Electroreduction of alkaline imidacloprid solution under potentiostatic conditions was carried out in a three-electrode system. The removal efficiencies of 80.2% (r-NiO) and 66.3% (NiO), and the current efficiencies of 67.3% (r-NiO) and 58.9% (NiO) were much higher than 41.7% (removal efficiency) and 0.003% (current efficiency) on the bare Ni electrode. This study prepared two novel thin films with composites of NiO or r-NiO, and thus provided feasible and efficient electrochemical degradation of imidacloprid. The degradation products were characterized and the possible degradation pathways were proposed.

Graphical abstract: Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

Supplementary files

Article information

Article type
Paper
Submitted
14 Nov 2019
Accepted
05 Jan 2020
First published
16 Jan 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 3040-3047

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

Z. Liu, Y. Tian, X. Zhou, X. Liu and L. Huang, RSC Adv., 2020, 10, 3040 DOI: 10.1039/C9RA09505E

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