Some Influencing Factors on Photocatalytic Activity of TiO₂ Film Prepared Using Sol-Gel Method

Abstract:

Subscript text TiO₂ film was deposited on glass substrate by a sol-gel process. The influences of the SiO₂ layer, distance between lamp and solution, and air flow rate were investigated. Methyl orange can be hardly degraded under UV light exposure alone. The adsorption rate of methyl orange on TiO₂ film is negative after 25 min of stirring. Although distance between the lamp and the solution varies from 5.5 cm to 7.5 cm, the degradation rates decline slightly. There is nearly no influence of air flow rate on the entire degradation ability of the photocatalyst. SiO₂ film coated on microscope glass slide has no photocatalytic activity under UV irradiation. In prior to deposit TiO₂ film onto the surface of the glass substrate, a SiO₂ thin layer is coated. The results indicate that the TiO₂ film with SiO₂ layer has much better photocatalytic activity that the film without SiO₂ layer.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 362-366
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.362
• Online since: January 2012
• Authors: Wen Jie Zhang, Qian Li, Wen Bin Liu
• Keywords: Methyl Orange (MO), Photocatalytic Degradation, Sol-Gel (SG), TiO₂ Film

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