Preparation and Photocatalytic Performance of SiO2-Pillared Layered Titanate

doi:10.3724/SP.J.1077.2008.01263

Abstract

Abstract: 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.

Key words: pillared layered titanate, photocatalysis, methylene bule

CLC Number:

O643

JIANG Fang,SHAO Fei. Preparation and Photocatalytic Performance of SiO₂-Pillared Layered Titanate[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.01263.

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Preparation and Photocatalytic Performance of SiO₂-Pillared Layered Titanate

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