Nanocrystallised titania and zirconia mesoporous thin films exhibiting enhanced thermal stability

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Abstract
Tuned chemical conditions complemented with a set of treatments have been developed to enhance the thermal stability of transition metal oxide mesoporous thin films (up to 500 °C for TiO2 and 450 °C for ZrO2), allowing the formation of crack-free coatings presenting excellent optical quality (transmittance higher than 85% in the visible region), tailored thickness (from 50 to 700 nm), a highly organised cubic (Im3m space group for TiO2) or 2D-hexagonal (P6m space group for ZrO2) mesostructure, high surface area (140–200 m2 g−1), controlled and narrowly distributed mesopore size (25–80 Å), and a nanocrystalline inorganic framework (anatase or tetragonal zirconia).

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