Effect of silver nanoparticles size prepared by photoreduction method on optical absorption spectra of TiO 2/Ag/N719 dye composite films
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Photiphitak C., Rakkwamsuk P., Muthitamongkol P., Sae-Kung C., Thanachayanont C.
Publisher: World Academy of Science, Engineering and Technology (WASET)
Publication year: 2010
Journal: Proceedings of the World Academy of Science, Engineering and Technology (2010-376X)
Volume number: 72
Start page: 67
End page: 70
Number of pages: 4
ISSN: 2010-376X
Languages: English-Great Britain (EN-GB)
Abstract
TiO 2/Ag composite films were prepared by incorporating Ag in the pores of mesoporous TiO 2 films using a photoreduction method. The Ag nanoparticle sizes were in a range of 3.66-38.56 nm. The TiO 2/Ag composite films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscropy (TEM). The TiO 2 films and TiO 2/Ag composite films were immersed in a 0.3 mM N719 dye solution and characterized by UV-Vis spectrophotometer. The TiO 2/Ag/N719 composite film showed that an optimal size of Ag nanoparticles was 19.12 nm and, hence, gave the maximum optical absorption spectra. The improved absorption was due to surface plasmon resonance induced by the Ag nanoparticles to enhance the absorption coefficient of the dye.
Keywords
TiO 2/Ag composite films
Contact Information