Topotaxy in the Anataserutile Transformation

Sol-gel template synthesis and photocatalytic behaviour of anatase titania nanoparticles

“…As a result, rutile transformation was kinetically promoted, and high percentage of rutile phase was obtained. This observation is similar to the studies on the anataserutile phase transformation in the presence of various oxides as nucleating agents 29,30 . In general, CaCO 3 nanoparticles, as a structure-directing agent, play an important role in the formation of the hollow or porous structure.…”

WO3/TiO2 catalysts: Morphological and structural properties

“…It has been reported [14,15,16] that the transition proceeds through the nucleation of ruffle at the surface of anatase and that it is strongly influenced by the oxygen vacancy concentration. It is evident that the W, by limiting the diffusion of oxygen vacancies, reduces the rate of anatase-rutile transition.…”

Processus dynamo-métamorphiques de bonification des gîtes de Fe-Ti /

“…Complete Feleaching resulted in a pure-TiÛ2 phase, usually anatase, similar to that observed in tropical weathering conditions in which humic acids contribute to iron leaching . Sutton paleoplacers were subjected to such conditions during Cambrian time ; Fig could not explain the locally abundant rutile, which usually occurs at high pressure and temperature (Shannon and Pask, 1964;Goldsmith and Force, 1978; , 1961;Heald and Weiss, 1972;Eppler, 1987). However, Gribb and Banfield (1997), Penn and Banfield (1999), Zhang and Banfield (1999) have demonstrated experimentally that rutile can crystallize from nanocrystalline anatase, similar to that found in the Sutton deposits, under hydrothermal conditions.…”