期刊
ELECTROCHIMICA ACTA
卷 269, 期 -, 页码 232-240出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.02.139
关键词
Mesoporous carbon; Air diffusion electrode; Solar photo electro-Fenton; Mineralization; Amoxicillin
资金
- PAICYT program
- Facultad de Ciencias Quimicas of the Universidad Autonoma de Nuevo Leon
- CONACYT (Consejo Nacional de Ciencia y Tecnologia) Mexico
- CONACyT [258789]
The aim of this work was to develop an air diffusion mesoporous carbon electrode (ADE-MC) as cathode for the in-situ electrogeneration of hydrogen peroxide and its application on electro-Fenton (EF) and solar photo electro-Fenton (SPEF) processes. Three different mesoporous carbon materials were obtained by organic-organic self-assembly synthesis (soft-template route) by changing concentrations of resorcinol-formaldehyde polymer as carbon precursor and Pluronic F-127 (TM) surfactant as matrix-forming agent. The materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), linear voltammetry (LV) and linear rotating disk electrode voltammetry (LV-RDE). MC materials showed pore diameter between 3.6 and 4.6 nm. The efficiency of ADE-MC was explored as a function of H2O2 produced at current densities (50, 100 and 150 mA cm(-2)). The highest production of H2O2 was 10.85 mmol L-1 by applying 150 mA cm(-2). Finally, the ADE-MC were used for the mineralization of amoxicillin (50 mg L-1), allowing complete degradation and mineralization percentages of 55% and 85% with EF and SPEF processes, respectively. MC electrodes produce H2O2 in enough amounts that provide a viable option to degradation and mineralization of others organic pollutants in aqueous media by EF and SPEF processes. (C) 2018 Elsevier Ltd. All rights reserved.
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