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首页> 外文期刊>RSC Advances >Photoelectrocatalytic water treatment systems: degradation, kinetics and intermediate products studies of sulfamethoxazole on a TiO2–exfoliated graphite electrode
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Photoelectrocatalytic water treatment systems: degradation, kinetics and intermediate products studies of sulfamethoxazole on a TiO2–exfoliated graphite electrode

机译：光电催化水处理系统：TiO 2 -脱落石墨电极上磺胺甲恶唑的降解，动力学和中间产物研究

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摘要

Sulfamethoxazole is an antibacterial agent which is commonly prescribed for the treatment of infections in humans and animals. The detection of this drug in the aqueous environment has raised considerable health concerns. Herein, we report the photoelectrocatalytic degradation of sulfamethoxazole at a TiO2–exfoliated graphite (TiO2–EG) anode. The TiO2–EG nanocomposite, synthesised by sol–gel and microwave methods, was characterised by XRD, Raman and FTIR spectroscopies, SEM and TEM. The cyclic voltammograms of the fabricated electrodes were obtained in [Fe(CN)6]3? redox probe. Concentration abatement of the antibiotic was monitored using a UV-vis spectrophotometer and the possible intermediates were investigated using LCMS. After 6 h of the photoelectrocatalytic process, almost 100% of the drug had been degraded and a 90% COD decay was achieved. The photoelectrocatalytic degradation of sulfamethoxazole entailed γ-, β-, δ- and ε-cleavages, hydroxylation and rings opening. The outcome of this study shows that the EG–TiO2 anode can be applied for the photoelectrocatalytic remediation of water contaminated by pharmaceuticals.
机译：磺胺甲基异恶唑是一种通常用于治疗人和动物感染的抗菌剂。在水环境中检测这种药物引起了相当大的健康问题。在此，我们报道了在TiO 2 -剥离石墨（TiO 2 -small EG）上光催化降解磺胺甲恶唑的过程。阳极。用X射线衍射，拉曼光谱和红外光谱，扫描电镜和透射电镜对通过溶胶-凝胶和微波法合成的TiO 2 -EG纳米复合材料进行了表征。在[Fe（CN） 6 ] 3？ 氧化还原探针中获得了所制作电极的循环伏安图。使用紫外可见分光光度计监测抗生素的浓度消除，并使用LCMS研究可能的中间体。光电催化过程6小时后，几乎100％的药物已降解，COD衰减达到90％。磺胺甲恶唑的光电催化降解需要进行γ-，β-，δ-和ε裂解，羟基化和开环。这项研究的结果表明，EG-TiO 2 阳极可用于光催化净化药物污染的水。

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