Web Release Date: January 15,
Local Structure of TiO2-Derived Nanotubes Prepared by the Hydrothermal Process
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan
Received: August 21, 2007
In Final Form: November 12, 2007
Abstract:
The structure of TiO2-derived nanotubes with about 10 nm outer diameter and 5 nm inner diameter and a few hundred nanometers in length prepared by the hydrothermal process in an aqueous NaOH solution was investigated. Especially, the local structure of TiO2-derived nanotubes was analyzed in detail on short-range order by extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) measurements. It was found that TiO2-derived nanotubes were mainly composed of layered titanate and the anatase-like structure was partly present in the titanate-based nanotubes. The formation of the anatase-like structure was thought to be caused from the consolidation of nanotubes.
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