Effect of Annealing Environments on Self-Organized TiO2 Nanotubes for Efficient Photocatalytic Applications
- Authors
- Hyam, Rajeshkumar Shankar; Lee, Jongseok; Cho, Eunju; Khim, Jeehyeong; Lee, Haigun
- Issue Date
- 12월-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- TiO2 Nanotube; Surface Defect; Photocatalysis; Anodization
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.12, pp.8908 - 8912
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 12
- Start Page
- 8908
- End Page
- 8912
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/106748
- DOI
- 10.1166/jnn.2012.6734
- ISSN
- 1533-4880
- Abstract
- In the present study, amorphous titanium dioxide (TiO2) nanotubes were synthesized by one-step anodization technique and subsequently annealed in different environments to investigate the effect of annealing atmospheres on the formation of different crystalline phases. X-ray Diffraction (XRD) patterns clearly showed the presence of anatase TiO2 phase with various crystallite sizes. The samples annealed in oxygen and air atmospheres at 500 degrees C showed a dominant anatase phase and a small amount of rutile phase, on the other hand, the samples annealed in nitrogen and argon atmospheres and in a vacuum at 500 degrees C contained the anatase phase only. XPS analysis of the samples showed a broadening in the binding energy curves with respect to variation in annealing atmosphere, confirming the variation in surface defects, which in turn affect photocatalytic degradation. The vacuum-annealed sample showed superior photocatalytic degradation efficiency as it had relatively higher pseudo-first order rate constants (k) of 0.009/min.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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