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Preparation and Properties of Titanium Oxide Photocatalyst with Visible Light Activity

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Abstract:

TiO2 photocatalyst were obtained from the hydrolysis product of TiOSO4 with ammonia and the photocatalytic activities were investigated by the photocatalytic degradation of methyl orange aqueous solution under UV-light and visible-light. The results showed that the absorption intensity in visible-light was dependent on the concentration of the materials, pH value and heat-treatment temperature. The color of the TiO2 varied from yellowish to vivid yellow when the TiO2 was calcined at different temperatures from 300°C to 500°C for 1h. The photocatalytic activity of TiO2 under visible light was determined by the photo-absorption feature in visible light region, which was related to the heattreatment temperature. The TiO2 calcined at 400°C shows stronger photo-absorption in visible light region and exhibits higher visible-light activity than the TiO2 calcined at other temperature.

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

377-380

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.377

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Online since:

February 2007

Authors:

Lei E, Ming Xia Xu, Lei Ge, Yu Ming Tian, Yan Li, Tiantian Xu

Keywords:

Photocatalytic Oxidation, TiO2, Visible Light Activity

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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