The Influence of Ag Doping on Structural, Optical Properties and Photocatalytic Activity of TiO2/SiO2 Nanocomposite

Document Type: Research Paper

Author

Abstract

In the present study, TiO
2
/SiO
2
and TiO
2
/SiO
2
/Ag nanocomposite powders were synthesized by
sol-gel technique. Moreover, for investigation of the Ag doping effect different concentrations
of dopant were added. Structures were characterized by IR spectroscopy, Scanning Electron
Microscopy (SEM), Energy Dispersive Analytical X-Ray (EDAX), and X-Ray Diffraction
(XRD) methods. Furthermore, the absorption coefficients of the samples were analyzed by
Tauc’s model and the direct band gaps were calculated. Photocatalytic activity of all samples
was investigated under UV irradiation in an aqueous medium. The results were shown that
photocatalytic activity improves in the presence of appropriate amount of Ag as dopant. 

Keywords