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Highly Ordered MCM-41 Silica Prepared in the Presence of Decyltrimethylammonium Bromide

2000; American Chemical Society; Volume: 104; Issue: 20 Linguagem: Inglês

10.1021/jp0001900

1520-6106

Abdelhamid Sayari, Yong Yang,

Zeolite Catalysis and Synthesis

Literature data show that for MCM-41 silica made in the presence of alkyltrimethylammonium bromide (ATAB) surfactants, the best quality materials in terms of framework order are those obtained with surfactants having 12−16 carbon atom alkyl chains. Lower molecular weight surfactants seem to be more difficult to self-organize, thus leading to less ordered materials with broader pore size distributions. Here, we provide reliable recipes which afford excellent quality materials using decyltrimethylammonium bromide. This method can also be applied to ATABs with 12 and 14 carbon chains.