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Preparation and Characterization of Silica-Pillared Derivatives from Kanemite

✍ Scribed by Sunao Toriya; Yukako Tamura; Takashi Takei; Masayoshi Fuji; Tohru Watanabe; Masatoshi Chikazawa

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
142 KB
Volume
255
Category
Article
ISSN
0021-9797

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✦ Synopsis

The silica-pillared derivatives from kanemite (NaHSi(2)O(5).3H(2)O) were prepared by intercalation of dialkyldimethylammonium (DADMA) ion and pillaring with tetraethylorthosilicate. The formation of silica pillars between the silicate sheets was demonstrated by X-ray diffraction, (29)Si CP/MAS NMR, and TEM observation. The basal spacing depended on the chain length of DADMA. Nitrogen adsorption study showed that the specific surface area was enlarged over 1000 m(2) g(-1) by the pillaring and that the pore size was in the micropore region. Water and benzene adsorption isotherms revealed that the surface properties of the pillared derivatives show hydrophobic character.

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