期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 15, 期 2, 页码 1091-1107出版社
ESG
DOI: 10.20964/2020.02.05
关键词
TiO2 nanotube arrays; Temperature; Photoelectrocatalytic; RhB degradation mechanism
资金
- Key R&D Programs in Shaanxi Province [2018SF-372]
- Water Science and Technology Projects Foundation of SWAG [2018SWAG0203]
TiO2 nanotube arrays electrodes at different temperature were successfully synthesized via anodization method. The as-prepared samples were characterized by FE-SEM, XRD, I-V curve, I-t curve, EIS and Mott-Shottky measurement. The FE-SEM and XRD results showed that temperature could affect the surface morphology, nanotube length and crystal structure of the electrodes. The photoelectrochemical measurements revealed that the photocurrent, flat band potential (V-fb), donor concentration (N-D) and the width of the space charge layer (W-sc) varied with the temperature. Rhodamine B (RhB) degradation experiment was conducted to investigate the photoelectrocatalytic activity of the electrodes. It was found that the electrode fabricated at 30 degrees C exerted the best catalytic activity and a strong reusability. The enhanced catalytic activity could be attributed to its fast charge transport and increased electrons-holes separation efficiency. Moreover, the main reactive species and degradation mechanism during the photoelectrocatalytic degradation process were also studied. It was observed that holes (h(+)), center dot OH and center dot O-2(-) benefited RhB degradation. Finally, a possible RhB degradation mechanism during the photoelectrodegradation was proposed. The results provided a specific RhB degradation pathway for photoelectrodegradation. These findings gave us a great insight to understand the property and photoelectrocatalytic process on TiO2 nanotube arrays.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据