Visible light responsive Ag/TiO2/MCM-41 nanocomposite films synthesized by a microwave assisted sol-gel technique
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Author list: Tongon W., Chawengkijwanich C., Chiarakorn S.
Publisher: Elsevier
Publication year: 2014
Journal: Superlattices and Microstructures (0749-6036)
Volume number: 69
Start page: 108
End page: 121
Number of pages: 14
ISSN: 0749-6036
eISSN: 1096-3677
Languages: English-Great Britain (EN-GB)
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Abstract
A convenient and inexpensive method for the preparation of visible light responsive nanocomposite film was introduced in this study. Silver doped TiO2 was incorporated into as-synthesized MCM-41, via a microwave assisted sol-gel technique. The nanocomposite film was formed by dip coating on a glass substrate. The characterization results displayed high adsorbability and photocatalytic properties of the Ag and MCM-41 enhanced TiO2 photocatalyst. Performance of the nanocomposite film was tested by photocatalytic decolorization of MB dye, under UV and visible light irradiation. Ag/Ti/Si (0.1/1/2) exhibited the highest photocatalytic decolorization of methylene blue, with an efficiency of 81% under UV, and 30% under visible light irradiation. The kinetic rate constant of MB dye on the composite films followed pseudo first-order reaction law (R2 > 0.9), arranged in the order of Ag/Ti/Si (0.1/1/2) > Ag/Ti/Si (0.1/1/1) > Ag/Ti/Si (0.1/1/0.5) > Ag/Ti/Si (0.1/1/0) > TiO2. ฉ 2014 Elsevier Ltd. All rights reserved.
Keywords
MCM-41, Nanocomposite film
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