Microstructure and formation mechanism of titanium dioxide nanotubes

被引:293
作者
Wang, YQ
Hu, GQ
Duan, XF
Sun, HL
Xue, QK
机构
[1] Chinese Acad Sci, Inst Phys, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R China
[2] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[3] Natl Lab Surface Sci, Inst Phys, Beijing 100080, Peoples R China
关键词
D O I
10.1016/S0009-2614(02)01502-6
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Titanium dioxide nanotubes are synthesized using sol-gel method. Electron energy-loss spectroscopy has been used to investigate the chemical composition of the nanotubes. The results show that the atomic ratio of O/Ti is very close to two. Electron diffraction studies indicate that the nanotubes have the anatase structure. High-resolution transmission electron microscopy studies show that the nanotubes possess a layered structure with layer spacing of about 7.1 Angstrom. The tube axis is determined to be along [010] direction of the anatase phase. The formation mechanism of the nanotubes can be explained as 3D --> 2D --> 1D. The two-dimensional lamellar TiO2 is essential for the formation of the nanotubes. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:427 / 431
页数:5
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