High surface area alpha-alumina preparation by using urban waste

0341292 - ÚACH 2010 RIV GB eng J - Článek v odborném periodiku
Martín-Ruiz, M.M. - Pérez-Maqueda, L.A. - Cordero, T. - Balek, Vladimír - Šubrt, Jan - Murafa, Nataliya - Pascual-Cosp, J.
High surface area alpha-alumina preparation by using urban waste.
Ceramics International. Roč. 35, č. 6 (2009), s. 2111-2117. ISSN 0272-8842. E-ISSN 1873-3956
Grant ostatní: Junta de Andalucia(ES) MAT2008-06619; Junta de Andalucia(ES) TEP-03002
Výzkumný záměr: CEZ:AV0Z40320502
Klíčová slova: alpha-alumina preparation * surface area * urban waste
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 1.686, rok: 2009

A new method for preparing high surface area a-alumina from urban waste is proposed. The method consists of the precipitation of a precursor that contains bohemite mixed with a linear polymer and subsequently the thermal decomposition of the precursor by heating in nitrogen and air to 1200 degrees C. The resulting a-alumina consists of nanocrystals of about 100 nm aggregated into larger particles with relatively high surface area (12 m(2) g(-1)) and a significant macropore volume of 0.545 cm(3) g. Methods of X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) were used to characterize microstructure of prepared materials. Results of differential thermal analysis, thermogravimetry and emanation thermal analysis characterized the thermal behaviour of alpha-alumina precursors.
Trvalý link: http://hdl.handle.net/11104/0184318