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TiO2 – aerogels morphology synthesis correlation

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: Virginia Danciu, Veronica Cosoveanu, I.Marian, Anca Peter, P Marginean, Emil Indrea

Editorial: Proceedings 11th Physical Chemistry Conference ROMPHYSCHEM-11, 10, p.1721-1728, 2003.

Rezumat:

Aerogels are highly porous materials that are produced via sol-gel processing and supercritical drying. Titanium dioxide aerogels were prepared using a variety of sol composition from the system Ti(OC3H7)4 / H2O/ EtOH / HNO3. The morphology of titanium dioxide aerogel was characterized by krypton adsorption, X-ray diffraction, scanning and transmission electron microscopies. The surface area, pore volume and pore size distribution of TiO2 aerogels depend on the gel preparation, drying and annealing. The photoassisted oxidation of salycilic acid on the TiO2 aerogels was compared with commercial (P-25)TiO2 powder. The aerogels showed a much higher photocatalytic activity.

Cuvinte cheie: TiO2 aerogels , sol-gel processing , supercritical drying , X-ray diffraction