Synthesis and microstructure of a novel TiO2 aerogel-TiO2 nanowire composite - Archive ouverte HAL
Article Dans Une Revue Nano Année : 2008

Synthesis and microstructure of a novel TiO2 aerogel-TiO2 nanowire composite

Yoshikazu Suzuki
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Marie-Hélène Berger
Daniela d'Elia
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Pierre Ilbizian
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Christian Beauger
Arnaud Rigacci
Jean-François Hochepied
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Patrick Achard

Résumé

TiO2 aerogel-10 mol% TiO2 nanowire composite was prepared by a sol-gel technique with the addition of TiO2 nanowires to TiO2 sol, followed by supercritical drying in CO2. TiO2 nanowires (anatase with minor rutile phases) as dispersoid were prepared by a hydrothermal process followed by calcination in air at 600°C. The TiO2 nanowires were dispersed in a 2-propanol/H2O/HNO3 solution, and the mixture was added drop by drop to a tetrabutyl orthotitanate [i.e. Ti (IV) n-butoxide] solution in 2-propanol. After gelation, the TiO2 alcogel-TiO2 nanowire composite was dried in supercritical CO2 to obtain the final, TiO2 aerogel-TiO2 nanowire composite. TEM analysis revealed that a unique "nanowire network" structure was formed withinthe mesoporous aerogel matrix. The aerogel-TiO2 nanowire composite had a relatively large surface area 427 m2/g, with mesopores ~ 16 nm in diameter and a pore of volume of 1.63 cm3/g.
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Dates et versions

hal-00367981 , version 1 (13-03-2009)

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Yoshikazu Suzuki, Marie-Hélène Berger, Daniela d'Elia, Pierre Ilbizian, Christian Beauger, et al.. Synthesis and microstructure of a novel TiO2 aerogel-TiO2 nanowire composite. Nano, 2008, 3 (5), pp.373-379. ⟨10.1142/S1793292008001222⟩. ⟨hal-00367981⟩
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