Počet záznamů: 1

Super/Subcritical Fluid Extractions for Preparation of the Crystalline Titania

  1. 1.
    0341176 - UCHP-M 2011 RIV NL eng J - Článek v odborném periodiku
    Matějová, Lenka - Cajthaml, Tomáš - Matěj, Z. - Benada, Oldřich - Klusoň, Petr - Šolcová, Olga
    Super/Subcritical Fluid Extractions for Preparation of the Crystalline Titania.
    Journal of Supercritical Fluids. Roč. 52, č. 2 (2010), s. 215-221 ISSN 0896-8446
    Grant CEP: GA ČR GP104/09/P290; GA ČR GA104/09/0694
    Výzkumný záměr: CEZ:AV0Z40720504; CEZ:AV0Z50200510
    Klíčová slova: titania * supercritical fluid extraction * pressurised fluid extraction
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.986, rok: 2010

    Crystallinity, purity and texture of TiO2 powder in dependence on the treatment mode (purification) of an amorphous reaction semi-product (titania organogel) was studied. Standard calcination was compared with various extraction techniques using fluids in sub/supercritical state. The suitable combination of extraction solvents and extraction conditions (temperature and pressure) was judged to synthesize TiO2 powders crystalline phase (Anatase) with a high specific surface area and purity. The optimal results were achieved by combined extraction procedures - subcritical water extraction and supercritical fluid extraction or pressurised liquid extraction. Moreover the possible tuning of the TiO2 powder pore-size distribution by regulation of temperature at constant pressure for the combination of subcritical water extraction and pressurised liquid extraction was found.
    Trvalý link: http://hdl.handle.net/11104/0184246