Amorphous mesostructured zirconia with high (hydro)thermal stability
Résumé
Here, combining the evaporation-induced self-assembly (EISA) method and the liquid crystal templating pathway, mesostructured amorphous zirconium oxides have been prepared by a soft templating method without addition of any heteroelement to stabilize the mesopore framework. The recovered materials have been characterized by SAXS measurements, nitrogen adsorption-desorption analysis and X-ray diffraction (XRD). The obtained mesostructured zirconia exhibits a high thermal stability. An in situ XRD study performed as a function of temperature shows that the amorphous ZrO 2 , obtained after removal of the pore templating agent (pluronic P123), begins to crystallize in air from 420 C. Amorphous mesostructured ZrO 2 also presents a high hydrothermal stability; these materials are not degraded after 72 hours in boiling water.
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Blin_RSC Adv 2020_ZrO2 mestructured synthesis.pdf (1.23 Mo)
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