Effect of Applied Potential on the Formation of Self-Organized TiO2 Nanotube Arrays and Its Photoelectrochemical Response
Self-organized TiO2 nanotube arrays have been fabricated by anodization of Ti foil in an electrochemical bath consisting of 1 M of glycerol with 0.5 wt% of NH4F. The effects of applied p...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2011-01-01
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| Series: | Journal of Nanomaterials |
| Online Access: | http://dx.doi.org/10.1155/2011/142463 |
| Summary: | Self-organized
TiO2 nanotube arrays have been
fabricated by anodization of Ti foil in an
electrochemical bath consisting of 1 M of
glycerol with 0.5 wt% of
NH4F. The effects of applied
potential on the resulting nanotubes were
illustrated. Among all of the applied potentials,
30 V resulted in the highest uniformity
and aspect ratio TiO2 nanotube arrays
with the tube's length approximately
1 μm and pore's size of 85 nm. TiO2
nanotube arrays were amorphous in as-anodized condition. The
anatase phase was observed after annealing at 400∘C in air atmosphere. The effect of crystallization and
effective surface area of TiO2 nanotube arrays in
connection with the photoelectrochemical response was reported.
Photoelectrochemical response under illumination was enhanced by
using the annealed TiO2 nanotube arrays which have
larger effective surface area to promote more photoinduced
electrons. |
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| ISSN: | 1687-4110 1687-4129 |