Preparation Conditions on Adsorption and Photocatalytic Activity of TiO2 Particles Prepared by Sol-Gel Method

Wen Jie Zhang; Yang Yu

doi:10.4028/www.scientific.net/AMR.230-232.131

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 230-232Preparation Conditions on Adsorption and...

Preparation Conditions on Adsorption and Photocatalytic Activity of TiO₂ Particles Prepared by Sol-Gel Method

Abstract:

The amounts of ethanol, HCl and H₂O, and also calcination conditions during sol-gel process of preparing TiO₂ photocatalyst were investigated. Methyl orange adsorption on TiO₂ prepared using different sol compositions is not more than 4% by varying the amount of ethanol, HCl and H₂O. The photocatalytic degradation is related to sol composition, and the optimal composition is composed of 10 ml ethanol, 1.0 ml H₂O, and 0.1 ml HCl. Calcination temperature and time are also important in TiO₂ preparation. The TiO₂ particle prepared at 500 °C for 3 h has the optimal photocatalytic activity. In the irradiation time range up to 100 min, photocatalytic degradation rate constantly increases up to 94.2%.