SiO2 pillared layered titanate (SiO2-H2Ti4O 9) was prepared from the layered K2Ti4O9 via a step-reaction method. The influences of alkyl chain length of intercalated alkylamines, washing methods and the hydrothermal time of alkylamine reacted with TEOS on the structure of SiO2-H2Ti4O9 were investigated. The photocatalytic activities of SiO2-H2Ti4O9 were evaluated by photocatalytic oxidation of methylene blue(MB) aqueous solution. The results reveal that the interlayer spacing of alkylamine pre-intercalation samples increases with the increase of the chain length of alkylamines, and the crystallinity of the samples washed with ethanol solution(1:1, v/v) is enhanced compared with anhydrous ethanol. SiO2-H2Ti4O9 treated twice by TEOS at 130℃ has an interlayer spacing of 1.45nm and a specific surface area of 148.4m2/g. SiO2 pillared layered titanate shows a higher efficiency of MB photo-degradation compared with its precursors K2Ti4O9.
JIANG Fang
,
SHAO Fei
. Preparation and Photocatalytic Performance of SiO2-Pillared Layered Titanate[J]. Journal of Inorganic Materials, 2008
, 23(6)
: 1263
-1266
.
DOI: 10.3724/SP.J.1077.2008.01263
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