Preparation and Characterization of TiO2 Nanotube Arrays by Anodic Oxidation Method

doi:10.3724/SP.J.1077.2010.00490

Abstract

Abstract:

Thin films of TiO₂ nanotube arrays were fabricated by anodic oxidation method in different electrolyte solution. The morphology of the film and the diameter of the nanotubes were observed by scanning electronic microscope (SEM). The crystal type of the film before and after heattreatment were characterized by X-ray diffraction (XRD) and Laser Raman.The results show that the electrolyte solution and applied votage have great effect on microstructure of the films. High order-aligned TiO₂ nanotube arrays of 110nm in outer diameter are prepared at 20V in the 0.24wt% HF aqueous solution. Films of nanotube arrays of 100nm in outer diameter are prepared at 20V in 0.5wt％NaF+2.7wt% Na₂SO₄ aqueous solution and 0.88wt% NH₄F glycerol-water (vol ratio 1∶1) mixture solution. The outer diameter (d) of nanotubes increase linearly with applied voltage (U) in the range of 0-25V which can be described as d=k×U+b with k=5.2nm/V and b=2.2nm. TiO₂ nanotube arrays with amorphous structure is transformed to anatase after annealed at 450℃ for 2h.

Key words: anodic oxidation, aligned TiO₂ nanotubes, preparation, anneal

CLC Number:

O646

LI Jian, LUO Jia, PENG Zhen-Wen, GUO Xin. Preparation and Characterization of TiO₂ Nanotube Arrays by Anodic Oxidation Method[J]. Journal of Inorganic Materials, 2010, 25(5): 490-494.

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Preparation and Characterization of TiO₂ Nanotube Arrays by Anodic Oxidation Method

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