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Journal Articles Journal of Physical Chemistry C Year : 2019

Revisiting Pressure-Induced Transitions in Mesoporous Anatase TiO2

Laurence Bois
Sylvie Le Floch
Jérémie Margueritat
Vittoria Pischedda

Abstract

Mesoporous materials may be considered as the negative image of a collection of nanoparticles. In both cases, the large surface area induces an increase of the system energy. Pressure-induced phase transitions are used to study the differences between mesoporous TiO 2 and a collection of TiO 2 nanoparticles. The synthesis and characterization of mesoporous TiO 2 with a nanosponge-like structure are presented and the inputs of different spectroscopic techniques (Terahertz, Brillouin and Raman) are highlighted. The results show that the phase stability of mesoporous TiO 2 under pressure is very similar to that observed in nanoparticles. 2
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Dates and versions

hal-02283188 , version 1 (20-05-2020)

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Denis Machon, Laurence Bois, Défi Jr Jubgang Fandio, Quentin Martinet, Alexis Forestier, et al.. Revisiting Pressure-Induced Transitions in Mesoporous Anatase TiO2. Journal of Physical Chemistry C, 2019, 123 (38), pp.23488-23496. ⟨10.1021/acs.jpcc.9b05650⟩. ⟨hal-02283188⟩
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