Post-synthesis of Thick Wall Mesoporous Silica with Wormhole Framework Structure Using Surfactant Micelles and Silica Source Incorporated Inside the Channels of Silica Precursor with Large-mesopores

Takayoshi SHINDO; Yuta NAKAZAWA; Kaoru SHIMA; Takao IKEUCHI; Sentaro OZAWA

doi:10.5188/ijsmer.18.33

Originals

Post-synthesis of Thick Wall Mesoporous Silica with Wormhole Framework Structure Using Surfactant Micelles and Silica Source Incorporated Inside the Channels of Silica Precursor with Large-mesopores

Takayoshi SHINDO, Yuta NAKAZAWA, Kaoru SHIMA, Takao IKEUCHI, Sentaro OZAWA

著者情報

キーワード: large-pore mesoporous silica, micelle solution, pore-filling impregnation, thickening the mesopore walls, wetting stability of mesoporous silica

ジャーナルフリー

2012 年 18 巻 2 号 p. 33-37

DOI https://doi.org/10.5188/ijsmer.18.33

詳細

抄録

Thick wall mesoporous silica molecular sieves with wormhole pore structure (MPS-TW) were prepared post-synthetically using cetyltrimethyammonium bromide (CTMABr) surfactant micelle solution and tetratethyl orthosilicate (TEOS) incorporated inside the channels of large-pore mesoporus silica (LP-MPS), followed by hydrolysis/condensation of TEOS. XRD spectra, N₂ adsorption isotherms and TEM images of the resultant materials exhibited that average wall thickness of the materials increased in the range of 1.2-2.2 nm, depending on the preparation conditions in the present study. It was found that molar ratio of CTMABr to TEOS as well as volume ratio of the micelle solution to the total pore volume of LP-MPS were key parameters affecting the wall thickness of MPS-TW samples.

責任著者(Corresponding author)

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