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Preparation of hydrophilic silicalite-1 nanocrystal-layered membranes and their application to separating water from water–acetone solution

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Title: Preparation of hydrophilic silicalite-1 nanocrystal-layered membranes and their application to separating water from water–acetone solution
Authors: Tago, Teruoki Browse this author →KAKEN DB
Nakasaka, Yuta Browse this author →KAKEN DB
Kayoda, Ayaka Browse this author
Masuda, Takao Browse this author →KAKEN DB
Keywords: pervaporation
hydrophilic zeolite membrane
silicalite-1 nanocrystal
water-acetone solution
Issue Date: 1-Oct-2008
Publisher: Elsevier Science BV
Journal Title: Microporous and Mesoporous Materials
Volume: 115
Issue: 1-2
Start Page: 176
End Page: 183
Publisher DOI: 10.1016/j.micromeso.2007.12.035
Abstract: Separation of water from a water-acetone solution was carried out by a pervaporation method using a hydrophilic silicalite-1 membrane. Silicalite-1 nanocrystals were piled up on the outer surface of cylindrical alumina ceramic filters, followed by a hydrothermal synthesis to form a silicalite-1 protection layer oil the nanocrystal layer. In other words, the membrane consisted of a silicalite-1 nanocrystal layer and a silicalite-1 protection layer (the nanocrystal-layered membrane). In order to achieve high hydrophilic properties of the membrane with the remaining silanol group, the liquid-phase oxidation technique was applied to remove the template. From the SEM observation, the nanocrystal layer and the protection layer were clearly observed, and the silicalitc-1 protection layer was uniformly formed on the nanocrystal layer. Pervaporation experiments to separate water from the water-acetone solution were conducted using the nanocrystal-layered membrane. It was considered that the secondary growth of the nanocrystals around the interface between the nanocrystal and protection layers affected the separation properties. The effects of the nanocrystal size oil the separation properties were examined. The membrane exhibited selective permeation as well as a high flux of water, and these properties were improved with a decrease in the size of the nanocrystals. Moreover, the layered membrane exhibited high hydrophilic properties regardless of the acetone concentrations. (C) 2008 Elsevier Inc. All rights reserved.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 多湖 輝興

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