Preparation and formation mechanism of mesoporous titania particles having crystalline wall

Hirobumi Shibata; Hisashi Mihara; Tatsuya Mukai; Taku Ogura; Hiroki Kohno; Takahiro Ohkubo; Hideki Sakai; Masahiko Abe

doi:10.1021/cm0524042

Preparation and formation mechanism of mesoporous titania particles having crystalline wall

Hirobumi Shibata, Hisashi Mihara, Tatsuya Mukai, Taku Ogura, Hiroki Kohno, Takahiro Ohkubo, Hideki Sakai, Masahiko Abe

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

60 Citations (Scopus)

Abstract

Mesoporous titania particles having anatase-type crystalline wall were prepared using a low-temperature crystallization technique. Crystalline mesoporous titania was obtained through the sol - gel process of titanium oxysulfate sulfuric acid hydrate (TiOSO₄·xH₂SO ₄·xH₂O) at 333 K in the presence of cetyltrimethylammonium bromide (C16TAB), a cationic surfactant. The mesoporous titania with hexagonal structure was formed according to the following mechanism. Nuclei of ultrafine titanium hydroxide oxide (TiO(OH)₂) were formed from TiOSO₄ on the periphery of the surface of cationic C16TAB micelles at the primary stage of sol-gel reaction. Then, heat treatment at 333 K induced the transformation of the particle wall from TiO(OH) ₂ to anatase nanocrystal, which resulted in the formation of mesoporous titania with a crystalline wall. Moreover, the presence of bromide ion (Br^-), the counterion of C16TAB, was shown to suppress the collapse of mesostructure by retarding the transition from anatase to rutile.

Original language	English
Pages (from-to)	2256-2260
Number of pages	5
Journal	Chemistry of Materials
Volume	18
Issue number	9
DOIs	https://doi.org/10.1021/cm0524042
Publication status	Published - May 2 2006
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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title = "Preparation and formation mechanism of mesoporous titania particles having crystalline wall",

abstract = "Mesoporous titania particles having anatase-type crystalline wall were prepared using a low-temperature crystallization technique. Crystalline mesoporous titania was obtained through the sol - gel process of titanium oxysulfate sulfuric acid hydrate (TiOSO4·xH2SO 4·xH2O) at 333 K in the presence of cetyltrimethylammonium bromide (C16TAB), a cationic surfactant. The mesoporous titania with hexagonal structure was formed according to the following mechanism. Nuclei of ultrafine titanium hydroxide oxide (TiO(OH)2) were formed from TiOSO4 on the periphery of the surface of cationic C16TAB micelles at the primary stage of sol-gel reaction. Then, heat treatment at 333 K induced the transformation of the particle wall from TiO(OH) 2 to anatase nanocrystal, which resulted in the formation of mesoporous titania with a crystalline wall. Moreover, the presence of bromide ion (Br-), the counterion of C16TAB, was shown to suppress the collapse of mesostructure by retarding the transition from anatase to rutile.",

author = "Hirobumi Shibata and Hisashi Mihara and Tatsuya Mukai and Taku Ogura and Hiroki Kohno and Takahiro Ohkubo and Hideki Sakai and Masahiko Abe",

year = "2006",

month = may,

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doi = "10.1021/cm0524042",

language = "English",

volume = "18",

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journal = "Chemistry of Materials",

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T1 - Preparation and formation mechanism of mesoporous titania particles having crystalline wall

AU - Shibata, Hirobumi

AU - Mihara, Hisashi

AU - Mukai, Tatsuya

AU - Ogura, Taku

AU - Kohno, Hiroki

AU - Ohkubo, Takahiro

AU - Sakai, Hideki

AU - Abe, Masahiko

PY - 2006/5/2

Y1 - 2006/5/2

N2 - Mesoporous titania particles having anatase-type crystalline wall were prepared using a low-temperature crystallization technique. Crystalline mesoporous titania was obtained through the sol - gel process of titanium oxysulfate sulfuric acid hydrate (TiOSO4·xH2SO 4·xH2O) at 333 K in the presence of cetyltrimethylammonium bromide (C16TAB), a cationic surfactant. The mesoporous titania with hexagonal structure was formed according to the following mechanism. Nuclei of ultrafine titanium hydroxide oxide (TiO(OH)2) were formed from TiOSO4 on the periphery of the surface of cationic C16TAB micelles at the primary stage of sol-gel reaction. Then, heat treatment at 333 K induced the transformation of the particle wall from TiO(OH) 2 to anatase nanocrystal, which resulted in the formation of mesoporous titania with a crystalline wall. Moreover, the presence of bromide ion (Br-), the counterion of C16TAB, was shown to suppress the collapse of mesostructure by retarding the transition from anatase to rutile.

AB - Mesoporous titania particles having anatase-type crystalline wall were prepared using a low-temperature crystallization technique. Crystalline mesoporous titania was obtained through the sol - gel process of titanium oxysulfate sulfuric acid hydrate (TiOSO4·xH2SO 4·xH2O) at 333 K in the presence of cetyltrimethylammonium bromide (C16TAB), a cationic surfactant. The mesoporous titania with hexagonal structure was formed according to the following mechanism. Nuclei of ultrafine titanium hydroxide oxide (TiO(OH)2) were formed from TiOSO4 on the periphery of the surface of cationic C16TAB micelles at the primary stage of sol-gel reaction. Then, heat treatment at 333 K induced the transformation of the particle wall from TiO(OH) 2 to anatase nanocrystal, which resulted in the formation of mesoporous titania with a crystalline wall. Moreover, the presence of bromide ion (Br-), the counterion of C16TAB, was shown to suppress the collapse of mesostructure by retarding the transition from anatase to rutile.

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JO - Chemistry of Materials

JF - Chemistry of Materials

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Preparation and formation mechanism of mesoporous titania particles having crystalline wall

Abstract

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