Synthesis and microstructure of a novel TiO2 aerogel-TiO2 nanowire composite
| Autor: | Daniela D’Elia, Marie-Hélène Berger, Arnaud Rigacci, Pierre Ilbizian, Yoshikazu Suzuki, Jean-François Hochepied, Christian Beauger, Patrick Achard |
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| Přispěvatelé: | CEP/Sophia, Centre Énergétique et Procédés (CEP), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Centre des Matériaux (MAT), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), CEP/Paris |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Anatase
Materials science Composite number aerogel microstructure Nanowire Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention law General Materials Science Calcination composite nanonetwork structure Supercritical drying Aerogel 021001 nanoscience & nanotechnology Condensed Matter Physics Supercritical fluid 0104 chemical sciences Chemical engineering nanowire [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology Mesoporous material TiO 2 |
| Zdroj: | NANO NANO, World Scientific Publishing, 2008, 3 (5), pp.373-379. ⟨10.1142/S1793292008001222⟩ ResearcherID |
| ISSN: | 1793-2920 |
| DOI: | 10.1142/S1793292008001222⟩ |
| Popis: | TiO 2 aerogel–10 mol% TiO 2 nanowire composite was prepared by a sol–gel technique with the addition of TiO 2 nanowires to TiO 2 sol, followed by supercritical drying in CO 2. TiO 2 nanowires (anatase with minor rutile phases) as dispersoid were prepared by a hydrothermal process followed by calcination in air at 600°C. The TiO 2 nanowires were dispersed in a 2-propanol/ H 2 O / HNO 3 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 TiO 2 alcogel– TiO 2 nanowire composite was dried in supercritical CO 2 to obtain the final, TiO 2 aerogel– TiO 2 nanowire composite. TEM analysis revealed that a unique "nanowire network" structure was formed within the mesoporous aerogel matrix. The aerogel– TiO 2 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. |
| Databáze: | OpenAIRE |
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