Study of the thermal nitridation of nanocrystalline Ti(OH)4 by X-ray and in situ neutron powder diffraction.

Legrand, Vincent; Merdrignac-Conanec, Odile; Paulus, Werner; Hansen, Thomas

Legrand, Vincent; Merdrignac-Conanec, Odile; Paulus, Werner; Hansen, Thomas.

Afiliación

Legrand V; LUNAM Université, Université de Nantes - Ecole Centrale Nantes, Institut de Recherche en Génie Civil et Mécanique UMR CNRS 6183, Equipe Etat Mécanique et Microstructure, 37 boulevard de l'Université, BP 406, 44602 Saint-Nazaire cedex, France. vincent.legrand@univ-nantes.fr

J Phys Chem A ; 116(38): 9561-7, 2012 Sep 27.

Article en En | MEDLINE | ID: mdl-22920834

RESUMEN

In situ neutron diffraction measurements of nanocrystalline titanium oxynitrides were performed, as a function of temperature and time, to explore the nitrogen/oxygen substitution mechanism occurring during their synthesis by reaction of gaseous ammonia with nanocrystalline Ti(OH)(4). These neutron diffraction experiments are supported by chemical analysis and X-ray diffraction, allowing the description of the structural variations and ordering process between the Ti(O/N)(2) anatase and the Ti(O/N) rock-salt phases. Our results show that the formation of the Ti(O/N) rock-salt phase goes along with the creation of vacancies on the Ti sites and that the N/O substitution proceeds but without N/O ordering.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Chem A Asunto de la revista: QUIMICA Año: 2012 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Estados Unidos

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