Analysis of Polymorphic Nanocrystals of TiO2 by X-Ray Rietveld Refinement and High-Resolution Transmission Electron Microscopy: Acetaldehyde Decomposition. (3rd August 2008)

• Record Type: Journal Article
• Authors: Carrera, R.; Castillo, N.; Arce, E.; Vázquez, A. L.; Moran-Pineda, M.; Montoya, J. A.; Del Ángel, P.; Castillo, S.
• Other Names: Bronstein Lyudmila Academic Editor.
• Is Part Of: Research letters in nanotechnology. Volume 2008(2008)
• Publication Date: 2008-08-03
• Subjects: Nanotechnology -- Periodicals; Nanotechnology; Periodicals; 620.5
• DOI: 10.1155/2008/138468
• Languages: English
• ISSNs: 1687-6849

Abstract

Abstract : In this work, TiO 2 nanocrystals were synthesized by the sol-gel method. These materials were annealed at 200 and 500 ∘ C; and characterized by the XRD-Rietveld refinement; and by BET and TEM. As for the low-temperature-treated sample (200 ∘ C), nanocrystals with small crystallite sizes (7 nm) and high abundance of anatase, coexisting with the brookite phase, were obtained. Meanwhile, the sample annealed at 500 ∘ C showed an increased crystallite size (22 nm) and an important polymorphic increment. The sample annealed at 200 ∘ C showed a high activity in the photocatalytic decomposition of acetaldehyde.