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 journalArticle

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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 languageEnglish
Pages (from-to)2256-2260
Number of pages5
JournalChemistry of Materials
Volume18
Issue number9
DOIs
Publication statusPublished - May 2 2006
Externally publishedYes

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Titanium
Crystalline materials
Titanium dioxide
Cationic surfactants
Hydrates
Sulfuric acid
Micelles
Nanocrystals
Sol-gel process
Sol-gels
titanium dioxide
Crystallization
Bromides
Heat treatment
Oxides
Ions
Temperature

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Preparation and formation mechanism of mesoporous titania particles having crystalline wall. / Shibata, Hirobumi; Mihara, Hisashi; Mukai, Tatsuya; Ogura, Taku; Kohno, Hiroki; Ohkubo, Takahiro; Sakai, Hideki; Abe, Masahiko.

In: Chemistry of Materials, Vol. 18, No. 9, 02.05.2006, p. 2256-2260.

Research output: Contribution to journalArticle

Shibata, H, Mihara, H, Mukai, T, Ogura, T, Kohno, H, Ohkubo, T, Sakai, H & Abe, M 2006, 'Preparation and formation mechanism of mesoporous titania particles having crystalline wall', Chemistry of Materials, vol. 18, no. 9, pp. 2256-2260. https://doi.org/10.1021/cm0524042
Shibata, Hirobumi ; Mihara, Hisashi ; Mukai, Tatsuya ; Ogura, Taku ; Kohno, Hiroki ; Ohkubo, Takahiro ; Sakai, Hideki ; Abe, Masahiko. / Preparation and formation mechanism of mesoporous titania particles having crystalline wall. In: Chemistry of Materials. 2006 ; Vol. 18, No. 9. pp. 2256-2260.
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AU - Ohkubo, Takahiro

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