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Hydrothermal Synthesis of Magadiite/Si‐ZSM‐11 Composites
Author(s) -
Ozawa Kiyoshi,
Okada Reika,
Nakao Yasuhiro,
Ogiwara Toshio,
Itoh Hiroyasu,
Iso Fumio
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04229.x
Subject(s) - zsm 5 , hydrothermal circulation , bromide , hydrothermal synthesis , aqueous solution , materials science , chemical engineering , composite material , catalysis , chemistry , zeolite , inorganic chemistry , organic chemistry , engineering
The simplified one‐step hydrothermal synthesis, in which SiO 2 is directly reacted with aqueous NaOH in the presence or absence of tetrapropylammonium bromide (TPABr) and tetrabutylammonium bromide (TBABr) as the template compound, was investigated. The reaction in the absence of the template compounds leads to the production of pure magadiite, whereas pure Si‐ZSM‐5 is produced by the reaction in the presence of TPABr. On the other hand, crystalline magadiite/Si‐ZSM‐11 composites are synthesized by the reaction in the presence of TBABr. Furthermore, for the composites, the particle sizes of the magadiite and Si‐ZSM‐11 may be influenced by the TBABr concentrations. It was also found that the compositions of magadiite and Si‐ZSM‐11 in the composites can be controlled by regulating the NaOH concentrations.