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

被引：14
作者：
Legrand, Vincent [1 ]
Merdrignac-Conanec, Odile [2 ]
Paulus, Werner [3 ]
Hansen, Thomas [4 ]
机构：
[1] Univ Nantes, LUNAM Univ, Inst Rech Genie Civil & Mecan UMR CNRS 6183, Ecole Cent Nantes,Equipe Etat Mecan & Microstruct, F-44602 St Nazaire, France
[2] Univ Rennes 1, Inst Sci Chim Rennes UMR CNRS 6226, Equipe Verres & Ceram, F-35042 Rennes, France
[3] Univ Montpellier 2, Inst Charles Gerhardt UMR CNRS 5253, Equipe Chim & Cristallog Mat, F-34095 Montpellier 5, France
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2012年 / 116卷 / 38期
关键词：
TIO2; PHOTOCATALYSIS; PHOTOACTIVITY;
D O I：
10.1021/jp306796u
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：9561 / 9567
页数：7
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