An application of transparent mesoporous bulk silica to a titanium dioxide photocatalyst with adsorption and decomposition functions

Mesoporous bulk silica with optical transparency and high porosity can be prepared using a gel-templating method. This unique material has potentially wide-ranging applications as containers of specific molecules, smart deliverers of target molecules, and photonic devices. Among the potential applic...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2008-04, Vol.46 (1), p.71-78
Main Authors: Otsuka, E., Kurumada, K., Suzuki, A., Matsuzawa, S., Takeuchi, K.
Format: Article
Language:English
Subjects:
Acetaldehyde
Adsorption
Ceramics
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Containers
Crystallization
Decomposition
Exact sciences and technology
General and physical chemistry
Glass
Inorganic Chemistry
Materials Science
Nanotechnology
Natural Materials
Optical and Electronic Materials
Original Paper
Photocatalysts
Photochemistry
Photonics
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Pore size
Porosity
Porous materials
Silicon dioxide
Surface physical chemistry
Titanium
Titanium dioxide
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Summary:Mesoporous bulk silica with optical transparency and high porosity can be prepared using a gel-templating method. This unique material has potentially wide-ranging applications as containers of specific molecules, smart deliverers of target molecules, and photonic devices. Among the potential applications, the use of silica as a photocatalyst is explored in this paper; the photocatalyst was prepared by loading titanium dioxide (titania) from the titania precursor solution into the mesoporous structure of silica with a controlled pore size. Even after crystallization, the titania-loaded silica remained highly mesoporous with uniform pore size and optical transparency. The ability of the adsorption and decomposition of acetaldehyde gas was evaluated by measuring the concentration change of the gas with and without the irradiation of ultraviolet rays. As a result, the specific surface area, the amount of titania and the calcination temperature were essential in determining the adsorption ability as well as the decomposition ability.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-008-1688-1