Photocatalytic Degradation of Active Brilliant Red on TiO₂/SiO₂ Composite Catalysts

Abstract:

TiO₂/SiO₂ composite catalysts were prepared using two-step sol-gel method, with tetrabutyl titanate and tetraethyl orthosilicate as the main raw materials, and its photocatalytic properties for degradation of active brilliant red X-3B solution were researched throuth Ti:Si molar ratio, calcined temperature, initial concentration and photocatalyst dosage. The results indicate that the TiO₂/SiO₂ composite catalysts prepared with Ti:Si molar ratio of 6, calcination at 500°C have the best photocatalytic activity, and the photocatalytic activity of the composite materials is higher than that of pure TiO₂ under the same conditions; moreover, it was found that degradation rate of active brilliant red X-3B solution increased with its lower initial concentration, and the optimum dosage of composite photocatalysts is 1.6g/L when the initial concentration of active brilliant red X-3B solution is 25mg/L.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 221-225
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.221
• Online since: March 2012
• Authors: Chun Hua Cao
• Keywords: Active Brilliant Red X-3B, Photocatalytic Degradation, Silica, Sol-Gel Method, Titania

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