阳极氧化
材料科学
电化学
化学工程
钛
阳极
基质(水族馆)
介电谱
X射线光电子能谱
核化学
电极
化学
铝
复合材料
冶金
物理化学
工程类
地质学
海洋学
作者
Weibin Huang,Yue Huang,Bobin Tang,Yuanhang Fu,Chunhui Guo,Jinzhong Zhang
出处
期刊:Chemosphere
[Elsevier]
日期:2023-05-01
卷期号:322: 138193-138193
被引量:7
标识
DOI:10.1016/j.chemosphere.2023.138193
摘要
In this study, a blue TiO2 nanotube arrays anode on porous titanium substrate (Ti-porous/blue TiO2 NTA) was successfully fabricated by facile anodization and in situ reduction, and was used to investigate the electrochemical oxidation of carbamazepine (CBZ) in aqueous solution. The surface morphology and crystalline phase of the fabricated anode were characterized by SEM, XRD, Raman spectroscopy and XPS, and the electrochemical analysis confirmed that blue TiO2 NTA on Ti-porous substrate had larger electroactive surface area, better electrochemical performance and higher ⋅OH generation ability than that on Ti-plate substrate. The removal efficiency of 20 mg L-1 CBZ in 0.05 M Na2SO4 solution reached 99.75% at 8 mA cm-2 after 60 min electrochemical oxidation, and the rate constant was 0.101 min-1 with low energy consumption. EPR analysis and free radical sacrificing experiments showed that ⋅OH played a key role in the electrochemical oxidation. The possible oxidation pathways of CBZ were proposed through the identification of degradation products, and the main reactions may involve deamidization, oxidization, hydroxylation and ring-opening. Compared with Ti-plate/blue TiO2 NTA anode, Ti-porous/blue TiO2 NTA anode displayed excellent stability and reusability, and is promising to be used in the electrochemical oxidation of CBZ in wastewater.
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