Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing

Hirotomo Nishihara; Shin R. Mukai; Seiji Shichi; Hajime Tamon

doi:10.1016/j.matlet.2010.01.073

Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing

Hirotomo Nishihara, Shin R. Mukai, Seiji Shichi, Hajime Tamon

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Homogeneous titania-silica binary hydrogels were molded into various shapes, microhoneycomb, self-standing bundle, microfibers, and powder, by a unidirectional freezing method. Moreover, by freeze-drying the unidirectionally frozen samples, the honeycomb walls or microfibers obtained were converted into mesoporous cryogels which possessed considerable high surface areas (up to 1057 m² g^{- 1}) and large mean pore diameters of 2-6 nm. Thanks to the high porosity and well-dispersed titania, the titania-silica binary cryogels exhibited very high photocatalytic activity in the decomposition of salad oil under ultraviolet irradiation.

Original language	English
Pages (from-to)	959-961
Number of pages	3
Journal	Materials Letters
Volume	64
Issue number	8
DOIs	https://doi.org/10.1016/j.matlet.2010.01.073
Publication status	Published - 2010 Apr 30

Keywords

Aerogels
Microstructure
Photocatalyst
Self-assembly
Sol-gel preparation
Template synthesis

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10.1016/j.matlet.2010.01.073

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title = "Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing",

abstract = "Homogeneous titania-silica binary hydrogels were molded into various shapes, microhoneycomb, self-standing bundle, microfibers, and powder, by a unidirectional freezing method. Moreover, by freeze-drying the unidirectionally frozen samples, the honeycomb walls or microfibers obtained were converted into mesoporous cryogels which possessed considerable high surface areas (up to 1057 m2 g- 1) and large mean pore diameters of 2-6 nm. Thanks to the high porosity and well-dispersed titania, the titania-silica binary cryogels exhibited very high photocatalytic activity in the decomposition of salad oil under ultraviolet irradiation.",

keywords = "Aerogels, Microstructure, Photocatalyst, Self-assembly, Sol-gel preparation, Template synthesis",

author = "Hirotomo Nishihara and Mukai, {Shin R.} and Seiji Shichi and Hajime Tamon",

note = "Funding Information: This work was partly supported by the Industrial Technology Research Grant Program in 2006, 06B44702a from the New Energy and Industrial Technology Development Organization (NEDO) of Japan. ",

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T1 - Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing

AU - Nishihara, Hirotomo

AU - Mukai, Shin R.

AU - Shichi, Seiji

AU - Tamon, Hajime

N1 - Funding Information: This work was partly supported by the Industrial Technology Research Grant Program in 2006, 06B44702a from the New Energy and Industrial Technology Development Organization (NEDO) of Japan.

PY - 2010/4/30

Y1 - 2010/4/30

N2 - Homogeneous titania-silica binary hydrogels were molded into various shapes, microhoneycomb, self-standing bundle, microfibers, and powder, by a unidirectional freezing method. Moreover, by freeze-drying the unidirectionally frozen samples, the honeycomb walls or microfibers obtained were converted into mesoporous cryogels which possessed considerable high surface areas (up to 1057 m2 g- 1) and large mean pore diameters of 2-6 nm. Thanks to the high porosity and well-dispersed titania, the titania-silica binary cryogels exhibited very high photocatalytic activity in the decomposition of salad oil under ultraviolet irradiation.

AB - Homogeneous titania-silica binary hydrogels were molded into various shapes, microhoneycomb, self-standing bundle, microfibers, and powder, by a unidirectional freezing method. Moreover, by freeze-drying the unidirectionally frozen samples, the honeycomb walls or microfibers obtained were converted into mesoporous cryogels which possessed considerable high surface areas (up to 1057 m2 g- 1) and large mean pore diameters of 2-6 nm. Thanks to the high porosity and well-dispersed titania, the titania-silica binary cryogels exhibited very high photocatalytic activity in the decomposition of salad oil under ultraviolet irradiation.

KW - Aerogels

KW - Microstructure

KW - Photocatalyst

KW - Self-assembly

KW - Sol-gel preparation

KW - Template synthesis

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JO - Materials Letters

JF - Materials Letters

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ER -

Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing

Abstract

Keywords

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