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

Journal of Applied Chemical Research

مقاله 11، دوره 9، special issue، دی 2015، صفحه 119-129   

نوع مقاله: Research Paper

نویسنده

Bahar Khodadadi

چکیده

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. 

کلیدواژه‌ها

nanocomposite؛ Sol-Gel technique؛ Photocatalytic Activity؛ TiO2/SiO2/Ag