Effect of Calcination Temperature on the Photocatalytic Activity of Porous TiO₂ Film

Abstract:

To obtain porous TiO2 film, the precursor sol was prepared by hydrolysis of Ti isopropoxide and then complexed with trehalose dihydrate. The porous TiO2 film was fabricated by dip-coating method on quartz glass substrates using this sol. The TiO2 films were calcined at 500-900 °C. The photocatalytic activities of the films were evaluated by examining decomposition of methylene blue in aqueous solution under UV light irradiation. The photocatalytic activity of the porous TiO2 film showed a different tendency according to the irradiation wavelength of UV light. The activity of the film evaluated under UV light irradiation with a wavelength of 254 nm was not affected a great deal by the clacination temperature. In the case of UV light irradiation with a wavelength of 365 nm, the activity of the film increased with increasing calcination temperature and that of the film calcined at 800 °C was the highest.

• Periodical: Materials Science Forum (Volume 658)
• Pages: 495-498
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.658.495
• Online since: July 2010
• Authors: Takeshi Miki, Kaori Nishizawa, Eiji Watanabe, Hiroshi Taoda
• Keywords: Photocatalytic, Porous Film, Sol-Gel (SG), TiO₂, Trehalose

References

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