High temperature diffraction studies of in-situ crystallization of nanostructured TiO2 photocatalysts
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Date
2012-01-01
Journal Title
Journal ISSN
Volume Title
Publisher
The Ameican Ceramic Society
Abstract
The in-situ crystallization of anatase and rutile on chemically-treated Ti-foils in the temperature range 20-900 degrees C has been investigated using synchrotron radiation diffraction and x-ray diffraction. The processing methodology has a profound influence on the morphology, crystallite size and growth rate of nanostructured TiO2. The anatase formed was metastable and transformed to rutile at similar to 800 degrees C. Increasing the temperature from 400 to 900 degrees C caused the sharpening of anatase (101) peaks and resulted in a concomitant coarsening in crystallite size. The surface of annealed samples exhibited TiO2 nanorods, nanowires or nanotubes depending on the processing method. Ion-beam analysis has indicated the existence of composition gradation within the annealed TiO2 samples at the near-surface. © 2012, The American Ceramic Society.
Description
Keywords
Temperature range 0400-1000 K, Diffraction, Nanostructures, Crystallization, Photocatalysis, Rutile
Citation
Low, I. M., Pang, W. K., Prida, V. D. L., Vega, V., Kimpton, J. A., & Ionescu, M. (2011). High temperature diffraction studies of in-situ crystallization of nanostructured TiO2 photocatalysts. Paper presented to the American Ceramic Society's 35th International Conference on Advanced Ceramics and Composites, Daytona Beach, Florida, January 23-28, 2011. In S. Mathur, S. S. Ray, S. Widjaja & D. Singh. (Eds.) Nanostructured Materials and Nanotechnology V, Ceramic Engineering and Science Proceedings, 3, 187-195. Hoboken, New Jersey: John Wiley & Sons, Inc. doi.org/10.1002/9781118095362.ch17