分散黄 3 染料在 BDD 阳极上的电化学氧化性能

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY
Cláudio M. de Castro, Ângela Kinoshita, Oswaldo Baffa, Paulo Olivi
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引用次数: 0

摘要

电化学氧化法是一种前景广阔的方法,可用于开发可行的替代品来处理各种来源的污染水体和污水,包括工业废水和生活废水。由于偶氮染料是纺织工业中使用的染料的重要组成部分,而且它们具有毒性,难以用传统方法处理,因此在本研究中,我们研究了偶氮染料分散黄 3(DY3)在掺硼金刚石(BDD)阳极上的电降解。副产物通过质谱法进行监测,电生成的羟基和硫酸根自由基通过电子顺磁共振光谱法(EPR)进行分析。在硝酸盐介质中,电解过程中形成的羟基自由基可通过 EPR 技术识别;而在硫酸盐介质中,除了羟基自由基外,还可识别硫酸根自由基。通过使用不同的电解条件,可以确认使用 BDD 电极的电化学方法降解偶氮染料的能力。DY3 在硫酸盐存在下的电降解催化效率是纯硝酸盐溶液存在下的 8 倍左右,这归因于硫酸根自由基的形成在很大程度上影响了 BDD 的电活性,加速了降解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Performance of electrochemical oxidation of Disperse Yellow 3 dye over BDD anodes

Performance of electrochemical oxidation of Disperse Yellow 3 dye over BDD anodes

Electrochemical oxidation is a promising approach for developing viable alternatives to treat polluted waters and effluents from various sources, including industrial and domestic wastewater. Since azo dyes represent an important part of the dyes used in the textile industries and because they are toxic and difficult to be treated by conventional methods, in this study, we investigate the electrodegradation of the azo dye Disperse Yellow 3 (DY3) on a boron-doped diamond (BDD) anode. Byproducts are monitored by mass spectrometry and the electrogenerated hydroxyl and sulfate free radicals are analyzed by electron paramagnetic resonance spectroscopy (EPR). Hydroxyl radical formation during the electrolysis in nitrate medium is identified by EPR technique whereas in the sulfate medium, sulfate radical is identified in addition to hydroxyl radicals. The use of different electrolysis conditions allows confirming the ability of the electrochemical method to degrade the azo dye using BDD electrodes. The catalytic effectiveness for the DY3 electrodegradation in the presence of sulfate is around 8 times more efficient than in the presence of pure nitrate solution, which is attributed to the sulfate radical formation that largely influences the BDD electroactivity, accelerating degradation.

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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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