Highly-ordered aluminosilicate mesoporous mesophase materials: physico-chemical properties and catalytic behaviour

Structural and textural characteristics as well as coordination states of a luminium and some catalytic properties are studied for highly-ordered (with very narrow XRD reflections) aluminosilicate mesoporous mesophase material s ((Si,Al)-MMM) prepared with different aluminium concentrations by hydroth ermal synthesis in the presence of C16H33N(CH3)(3)Br. As shown, all physico -chemical parameters measured for these systems including their structural hydrostability are strongly influenced by the aluminium content. Based on a nalysis of the results obtained, a description of probable transformations during formation of mesoporosity in the C16-(Si,Al)-MMM is considered. (C) 2000 Elsevier Science B.V. All rights reserved.