Study of the Thermal Nitridation of Nanocrystalline Ti(OH)4 by X-ray and in Situ Neutron Powder Diffraction - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry A Année : 2012

Study of the Thermal Nitridation of Nanocrystalline Ti(OH)4 by X-ray and in Situ Neutron Powder Diffraction

Résumé

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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Matériaux
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Dates et versions

hal-00802239 , version 1 (19-03-2013)

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Vincent Legrand, Odile Merdrignac-Conanec, Werner Paulus, Thomas Hansen. Study of the Thermal Nitridation of Nanocrystalline Ti(OH)4 by X-ray and in Situ Neutron Powder Diffraction. Journal of Physical Chemistry A, 2012, 116, pp.9596. ⟨10.1021/jp306796u⟩. ⟨hal-00802239⟩
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