Morphology modification of TiO₂ nanotubes by controlling the starting material crystallite size for chemical synthesis

Authors: Kim, Jang-Yul¹; Sekino, Tohru²; Park, Dong²; Tanaka, Shun-Ichiro²

Source: Journal of Nanoparticle Research, Volume 13, Number 6, June 2011 , pp. 2319-2327(9)

Publisher: Springer

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Abstract:

TiO₂ nanotubes (NTs) were prepared by low-temperature chemical synthesis using anatase TiO₂ particles with different crystallite sizes in a NaOH solution followed by water washing and HCl neutralization. The synthesized TiO₂ NTs showed diverse morphologies depending on the starting materials. The crystallite size of TiO₂ raw materials increased with an increase in annealing temperature, and larger TiO₂ NTs, around 31 nm in diameter, were obtained from large raw powder with a crystallite size of 117 nm. X-ray diffraction and Raman spectroscopy revealed that the obtained TiO₂ NT exhibited lower crystallinity; however, Raman vibration seems to be more likely than a rutile structure.

Keywords: TiO2 nanotube; Low-temperature chemical synthesis; Crystallinity; Morphology

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s11051-010-9990-6

Affiliations: 1: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan, Email: jyulkim@mail.tagen.tohoku.ac.jp 2: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan

Publication date: 2011-06-01