Enhanced photocatalytic activity of titanium oxide nanotubes after heating treatment

Liu, Meinan, Chang, Jin, Wang, Hongxia, Yan, Cheng, & Bell, John (2012) Enhanced photocatalytic activity of titanium oxide nanotubes after heating treatment. Journal of Nanoscience and Nanotechnology, 13(2), pp. 1141-1144.

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Titanium oxide nanotubes were obtained by an electrochemical anodization method. Scanning electron microscope results demonstrate that the diameter of the tubes is about 120 nm and the length of the tubes is around 13 μm. Transmission electron microscope results indicate that the nanotubes are assembled by numerous nanoparticles and tube-like structure remains well after heat treatment at 400-600 °C. The photocatalysis performance of the nanotubes was evaluated in terms of the decomposition rate of methyl orange under UV irradiation. The results show that the photocatalytic activity was enhanced through the heating treatment of the nanotubes, and the nanotubes heated at 600 °C exhibits the best photocatalytic activity. X-ray diffraction patterns indicate that there is no phase transformation during the heat treatment. Therefore, the enhanced activity can be attributed to the improvement of nanotubes crystallinity, which may provide more insights about the effect of the crystallinity on the photocatalytic performance.

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ID Code: 58396
Item Type: Journal Article
Refereed: Yes
Additional Information: available online in 2013
Keywords: Titanium Oxide, Nanotubes, Heating Treatment, Photocatalytic Decomposition
DOI: 10.1166/jnn.2013.6020
ISSN: 1533-4899
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Functional Materials (091205)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700) > Nanomaterials (100708)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 American Scientific Publishers
Copyright Statement: All rights reserved
Deposited On: 19 Mar 2013 00:37
Last Modified: 28 Mar 2013 08:09

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