The formation mechanism of titania nanotube arrays in hydrofluoric acid electrolyte |
| |
Authors: | Jing Bai Baoxue Zhou Longhai Li Yanbiao Liu Qing Zheng Jiahui Shao Xinyuan Zhu Weimin Cai Junsheng Liao Lexi Zou |
| |
Affiliation: | (1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China;(2) China Academy of Engineering Physics, Mianyang, 621900, People’s Republic of China |
| |
Abstract: | Self-organized and highly ordered titania nanotube arrays (TNAs) were prepared through electrochemical anodic oxidization
on a titanium foil in 0.5 wt.% hydrofluoric acid (HF) electrolyte. The current density and morphology images during the formation
process of TNAs were studied. Results show that the formation of TNAs includes the following processes. Initially, dense oxide
of titania was rapidly formed on the titanium surface, followed by small pore formation. The adjacent small pores were then
integrated and become larger pores. At the same time, small tubes were transformed. These small tubes were further integrated
into larger tubes until the primary tube formation. Finally, the tubular structure was gradually optimized and eventually
developed into the highly ordered TNAs. A model was proposed to explain the formation mechanism of TNAs fabricated on a titanium
foil in HF acid electrolyte. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|