Kinetic approach for the adsorption-photodecomposition properties of mesoporous silica-titania

We have fabricated mesoporous silica-titania by a sol–gel method and evaluated the photocatalytic activity using acetaldehyde. The synthesized mesoporous silica-titania was effective for the removal of acetaldehyde from gas phase by adsorption and photodecomposition. In this study, the kinetic appro...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2019/04/01, Vol.127(4), pp.242-248
Main Authors: HIRATA, Shingo, INADA, Miki, ENOMOTO, Naoya, HAYASHI, Katsuro, HOJO, Junichi
Format: Article
Language:English
Subjects:
Acetaldehyde
Adsorbent
Adsorption
Catalytic activity
Decomposition reactions
Kinetic analysis
Mesoporous silica-titania
Photocatalysis
Photocatalyst
Photodecomposition
Silicon dioxide
Sol-gel processes
Tin
Vapor phases
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Summary:We have fabricated mesoporous silica-titania by a sol–gel method and evaluated the photocatalytic activity using acetaldehyde. The synthesized mesoporous silica-titania was effective for the removal of acetaldehyde from gas phase by adsorption and photodecomposition. In this study, the kinetic approach was carried out in order to clarify the adsorption-photodecomposition property of mesoporous silica-titania. The adsorption, direct photodecomposition and concerted adsorption-photodecomposition can be separately described in our simulation curves, which indicates that the adsorbability strongly affects the removal of acetaldehyde in the early stage and the photodecomposition after the strong adsorption of acetaldehyde on mesoporous silica-titania is important for the complete removal of acetaldehyde from gas phase.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.19003