Degradation of thiamethoxam wastewater using the gas diffusion electrode catalyst by LaNi1-xCoxO3

DOI

10.2991/icseee-15.2016.72How to use a DOI?

Keywords

LaNi1-xCoxO3; perovskite; gas diffusion electrode; thiamethoxam; degradation

Abstract

Cobalt doped at B site from LaNiO3 with catalyst perovskite structure was synthesized by sol-gal process of thermal decomposition citrates. The gas diffusion electrode was manufactured via a complex process chain of catalyst LaNi1-xCoxO3 (LNC, x=0, 0.2, 0.4, 0.8, 1.0), graphite, sodium sulfate, PTFE and acetylene black. TGA-DTA, X-ray diffraction (XRD) and transmission electron microscope (TEM) were performed to investigate sintering temperature and crystal structure of LaNi1-xCoxO3. Meanwhile, the electrode characteristic was investigated by using cyclic voltammetry (CV) and degradation experiment. The results suggested excellent electrochemical characteristics of gas diffusion electrode equipped with perovskite-type oxide of LaNi0.8Co0.2O3 with respect to the oxygen reduction reaction. Good degradation of thiamethoxam pesticide wastewater concentration was also observed by UV–vis spectrophotometer equipment. Specifically, after 60 minutes of electrochemical catalytic degradation in Electro-Fenton Oxidation Process, the maximum degradation efficiency could be reached with the current density 3.1mA/cm2, and pH 3. It was worth noting that both the current density and pH met the first order reaction kinetics equation in the degradation process. In addition, an improved gas diffusion electrode was manufactured so as to analyze the products (N-methyl-nitro-formamide) of thiamethoxamin degradation process by LC-MS. The results demonstrated improved degradation efficiency of refractory organics with the method.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Shanping Li
AU  - Lijun Liu
AU  - Yahui Li
PY  - 2016/04
DA  - 2016/04
TI  - Degradation of thiamethoxam wastewater using the gas diffusion electrode catalyst by LaNi1-xCoxO3
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 445
EP  - 459
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.72
DO  - 10.2991/icseee-15.2016.72
ID  - Li2016/04
ER  -