2007 Fiscal Year Final Research Report Summary
Structure Control of TiO_2 Nanotubes Having Mesopores on Their Tube Wall
| Project/Area Number |
18550189
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | University of Fukui |
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Principal Investigator |
NAKANE Koji University of Fukui, Department of Materials Science and Engineering, Assistant Professor (50292446)
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| Co-Investigator(Kenkyū-buntansha) |
OGATA Nobuo University of Fukui, Department of Materials Science and Engineering, Professor (70108249)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Environmental Materials / Catalyst / Chemical Process / Nanomaterials / Nanotubes / Fullerene |
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| Research Abstract |
PVA-Ti alkoxide hybrid precursor nanofibers were formed by the immersion of pure PVA nanofibers in Ti alkoxide-ethanol solution. It is likely that a precursor nanofiber with a skin-core structure would be obtained by our method ; the skin layer is PVA-Ti alkoxide hybrid, and the core is pure PVA. TiO_2 nanotubes were easily formed by calcination of the precursor nanofibers. The diameter of the nanotube can be controlled by changing the diameter of the pure PVA nanofiber. The range of the outer diameter which can be formed in this study is 300-600nm.The nanotubes obtained had a high specific surface area and the existence of mesopores on the nanotube wall was indicated by the nitrogen adsorption isotherms. Anatase type TiO_2 was formed at 400-600℃, and the peak intensity increases with an increase in the calcination time. Rutile type TiO_2 was formed above 700℃. The photocatalysis of the TiO_2 nanotubes was evaluated using the photocatalytic decomposition of methylene blue and acetaldehyde. There were superior to the photocatalysis of commercially available anatase type TiO_2 nanoparticles.
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