Highly-Porous Metal Oxide Aerogels; Preparation and Characterization

0360272 - ÚCHP 2012 DE eng C - Konferenční příspěvek (zahraniční konf.)
Matějová, Lenka - Matěj, Z. - Fajgar, Radek - Schneider, Petr - Šolcová, Olga
Highly-Porous Metal Oxide Aerogels; Preparation and Characterization.
Book of Abstracts. -, 2011, s. 181. ISBN N.
[International Symposium on Characterization of Porous Solids - COPS 9 /9./. Dresden (DE), 05.06.2011-08.06.2011]
Grant CEP: GA ČR GP104/09/P290; GA AV ČR KAN400720701
Výzkumný záměr: CEZ:AV0Z40720504
Klíčová slova: aerogel * metal oxide * extraction
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
www.dechema.de/cops http://arl-repository.lib.cas.cz/nusl/UCHP-M/cav_un_epca-0360272_01.pdf

In this study single oxide aerogels of TiO2, ZrO2 and CeO2 and some mixed oxide aerogels, TiO2-ZrO2 and TiO2-CeO2, were prepared by sol-gel process controlled in the reverse micellar environment of the nonionic surfactant Triton X-114 in cyclohexane at ambient temperature. Titanium (IV) isopropoxide, 70 wt-% zirconium (IV) propoxide in propan-1-ol and cerium (III) nitrate hexahydrate were used like metal precursors. The prepared rigid organogels were extracted by subcritical water and/or super/subcritical methanol. The effect of various extraction conditions - temperature, pressure, volume of solvent, flow rate - on textural and structural properties of synthesized metal oxide aerogels was investigated.
Trvalý link: http://hdl.handle.net/11104/0197863