Photocatalytic Properties of Ag Surface Doped Nanocrystalline TiO₂-SiO₂ Composite Films

Abstract:

Ag surface doped TiO₂-SiO₂ composite films had been synthesized by the sol-gel method and doping processes, in which tetrabutyl titanate (Ti(OC₄H₉)₄) and tetraethylorthosilicate (TEOS) were chosen as the precursors and silver nitrate (AgNO₃) was chosen as silver source. The experimental results revealed that the Ag surface doped TiO₂-SiO₂ composite film was composed of uniform round-like nano-particles or aggregates with the size range of 4–10 nm. Compared with pure TiO₂ film, Ag surface doped TiO₂-SiO₂ composite film exhibited excellent photocatalytic activity. It is believed that the microstructure of the composite film is responsible for improving the photocatalytic activity.

• Periodical: Advanced Materials Research (Volumes 532-533)
• Pages: 153-156
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.532-533.153
• Online since: June 2012
• Authors: Ling Xiao Guan, Nan Zhao, Ming Ming Yao
• Keywords: Ag Doping, Microstructure, Photocatalytic Activity, TiO₂-SiO₂ Film

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