Synthesis of Porous TiO2 Thin Films via Sol-Gel Method and their Phototocatalyst Performances

Jian Xi Yao; Zhi Hua Tian; Mi Na Guli; Masahide Takahashi; Toshinobu Yoko

doi:10.4028/www.scientific.net/MSF.687.765

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HomeMaterials Science ForumMaterials Science Forum Vol. 687Synthesis of Porous TiO2 Thin Films via Sol-Gel...

Synthesis of Porous TiO₂ Thin Films via Sol-Gel Method and their Phototocatalyst Performances

Abstract:

Macroporous TiO₂ films have been prepared by sol-gel method without any surfactant and colloidal templates. The gel TiO₂ films deposited from the precursor solutions containing photo monomer were irradiated by the UV light for some time. The UV irradiation could induce the monomer to polymerize, which resulted in two phases in the films, one was the emerging polymer rich phase, and another was the residual monomer-TiO₂ oligomer rich phase. After heat-treatment, a well-defined interconnected macroporous TiO₂ films could be obtained. SEM and AFM results showed that the macroporous structures of the films could be tuned by changing the reaction parameters. The as-prepared macroporous TiO₂ films exhibited much higher photocatalytic activity for the photodecomposition of methylene blue dye than that of the dense film.

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Materials Science Forum (Volume 687)

Pages:

765-770

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.687.765

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Online since:

June 2011

Authors:

Jian Xi Yao, Zhi Hua Tian, Mi Na Guli, Masahide Takahashi, Toshinobu Yoko

Keywords:

Macroporous TiO₂ Film, Phase Separation, Photo Grafted Polymerization, Photocatalytic Properties

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