Preparation of porous titania film by modified sol-gel method and its application to photocatalyst

Miah Muhammed Yusuf; Hiroaki Imai; Hiroshi Hirashima

doi:10.1023/A:1016045111857

Preparation of porous titania film by modified sol-gel method and its application to photocatalyst

Miah Muhammed Yusuf, Hiroaki Imai, Hiroshi Hirashima

Department of Applied Chemistry

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

64 Citations (Scopus)

Abstract

Sol-Gel derived mesoporous titania films with controlled pore sizes were prepared by surfactant templating. The coating sol was obtained by hydrolysis of Ti(OC₄H₉)₄ in ethanol/HCl solution. The gel films, prepared by spin coating on glass substrate, were dried after immersion in surfactant solutions under an atmospheric pressure. The porous films of anatase with columnar and rectangular structure were obtained after annealing at 500°C. The annealed films are transparent and 180-140 nm in thickness. Refractive indices of the films with surfactant immersion were 10-20% lower than those of the films without immersion. The spacing between the columns or rectangular grains and the grain shape were found to depend on the surfactant species. The photo-catalytic activity of the films for the oxidation of NO_x was improved by the surfactant modification.

Original language	English
Pages (from-to)	65-74
Number of pages	10
Journal	Journal of Sol-Gel Science and Technology
Volume	25
Issue number	1
DOIs	https://doi.org/10.1023/A:1016045111857
Publication status	Published - 2002 Aug

Keywords

Anatase
Mesoporous films
Photocatalyst
Sol-gel method
Surfactant templating

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Biomaterials
Condensed Matter Physics
Materials Chemistry

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10.1023/A:1016045111857

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abstract = "Sol-Gel derived mesoporous titania films with controlled pore sizes were prepared by surfactant templating. The coating sol was obtained by hydrolysis of Ti(OC4H9)4 in ethanol/HCl solution. The gel films, prepared by spin coating on glass substrate, were dried after immersion in surfactant solutions under an atmospheric pressure. The porous films of anatase with columnar and rectangular structure were obtained after annealing at 500°C. The annealed films are transparent and 180-140 nm in thickness. Refractive indices of the films with surfactant immersion were 10-20% lower than those of the films without immersion. The spacing between the columns or rectangular grains and the grain shape were found to depend on the surfactant species. The photo-catalytic activity of the films for the oxidation of NOx was improved by the surfactant modification.",

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author = "Yusuf, {Miah Muhammed} and Hiroaki Imai and Hiroshi Hirashima",

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T1 - Preparation of porous titania film by modified sol-gel method and its application to photocatalyst

AU - Yusuf, Miah Muhammed

AU - Imai, Hiroaki

AU - Hirashima, Hiroshi

PY - 2002/8

Y1 - 2002/8

N2 - Sol-Gel derived mesoporous titania films with controlled pore sizes were prepared by surfactant templating. The coating sol was obtained by hydrolysis of Ti(OC4H9)4 in ethanol/HCl solution. The gel films, prepared by spin coating on glass substrate, were dried after immersion in surfactant solutions under an atmospheric pressure. The porous films of anatase with columnar and rectangular structure were obtained after annealing at 500°C. The annealed films are transparent and 180-140 nm in thickness. Refractive indices of the films with surfactant immersion were 10-20% lower than those of the films without immersion. The spacing between the columns or rectangular grains and the grain shape were found to depend on the surfactant species. The photo-catalytic activity of the films for the oxidation of NOx was improved by the surfactant modification.

AB - Sol-Gel derived mesoporous titania films with controlled pore sizes were prepared by surfactant templating. The coating sol was obtained by hydrolysis of Ti(OC4H9)4 in ethanol/HCl solution. The gel films, prepared by spin coating on glass substrate, were dried after immersion in surfactant solutions under an atmospheric pressure. The porous films of anatase with columnar and rectangular structure were obtained after annealing at 500°C. The annealed films are transparent and 180-140 nm in thickness. Refractive indices of the films with surfactant immersion were 10-20% lower than those of the films without immersion. The spacing between the columns or rectangular grains and the grain shape were found to depend on the surfactant species. The photo-catalytic activity of the films for the oxidation of NOx was improved by the surfactant modification.

KW - Anatase

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KW - Photocatalyst

KW - Sol-gel method

KW - Surfactant templating

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Preparation of porous titania film by modified sol-gel method and its application to photocatalyst

Abstract

Keywords

ASJC Scopus subject areas

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