title: Preparation and characterization of silica-pillared derivatives from kanemite.
abstract: 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.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan. s-toriya@ecomp.metro-u.ac.jp
authors.forename: Sunao
authors.initials: S
authors.lastname: Toriya
authors.forename: Yukako
authors.initials: Y
authors.lastname: Tamura
authors.forename: Takashi
authors.initials: T
authors.lastname: Takei
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Fuji
authors.forename: Tohru
authors.initials: T
authors.lastname: Watanabe
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Chikazawa