Tube-in-Tube TiO2 Nanotubes with Porous Walls: Fabrication, Formation Mechanism, and Photocatalytic Properties
Journal article published in 2010 by
Xijin Xu,
Xiaosheng Fang,
Tianyou Zhai 
,
Haibo Zeng,
Baodan Liu,
Xiaoye Hu,
Yoshio Bando ,
Dmitri Golberg
,
Haibo Zeng,
Baodan Liu,
Xiaoye Hu,
Yoshio Bando ,
Dmitri Golberg
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Abstract
Self-organized, freestanding TiO2 nanotube arrays that exhibit tube-in-tube morphology are fabricated using a one-step anodic method. These arrays are uniform and compact. The tubes within the arrays are several micrometers long with a 200 nm outer diameter. They have a coarse lateral profile that leads to a large aspect ratio and guarantees good photocatalytic properties.