Počet záznamů: 1

Synthesis and Characterization of Nanostructured Sulfated Zirconias

  1. 1.
    0338944 - UCHP-M 2010 RIV NL eng J - Článek v odborném periodiku
    Lutecki, M. - Šolcová, Olga - Werner, S. - Breitkopf, C.
    Synthesis and Characterization of Nanostructured Sulfated Zirconias.
    Journal of Sol-Gel Science and Technology. Roč. 53, č. 1 (2010), s. 13-20 ISSN 0928-0707
    Grant ostatní:DFG(DE) BR2068/2-1; DFG(DE) BR2068/2-2
    Výzkumný záměr: CEZ:AV0Z40720504
    Klíčová slova: sulfated zirconia * template assisted synthesis * porous materials
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 1.525, rok: 2010

    Thermally stable sulfated zirconia catalysts were synthesized via a templating procedure and compared with standard zirconia materials prepared by precipitation without templates. Two preparation routes with various amphiphilic systems were employed as structure directing agents: synthesis with hexadecyltrimethyl ammonium bromide, and combined use of surfactant Brij-(A (R)) and triblock-copolymer Pluronic P123(A (R)). The formation of materials was characterized by use of TEM, SEM, X-ray diffraction as well as nitrogen adsorption and mercury intrusion techniques. Different self-assembling properties of the structure directing compounds led to sulfated zirconia materials exhibiting improved morphological and structural properties in terms of thermal stability, specific surface areas, pore diameters and porosity factors. Notably, hierarchical pore structures were obtained for the synthesis route via a combined use of Brij-56(A (R)) and P123(A (R)).
    Trvalý link: http://hdl.handle.net/11104/0182591