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Au-TiO2 nanofilms for enhanced photocatalytic activity.
- Source :
-
Thin Solid Films . Aug2017, Vol. 636, p490-498. 9p. - Publication Year :
- 2017
-
Abstract
- Au/TiO 2 nanofilms are prepared on indium-tin oxide glass using magnetron sputtering. The bilayer nanofilms are heat-treated at 500 °C in air for 2 h. The microstructure evolution of the prepared Au/TiO 2 nanofilms is characterized, using scanning electron microscope, energy dispersive spectrometer, and X-ray diffraction. The heat treatment leads to the migration of Au atoms to form Au/TiO 2 nanofilms with TiO 2 being in anatase phase and the presence of Au films/islands on the surface of the Au/TiO 2 nanofilms. The photocatalytic activity of the prepared Au/TiO 2 nanofilms in an aqueous solution of methylene blue (MB) is evaluated under the irradiation of visible light. The experimental results show that the photocatalytic activity of the prepared Au/TiO 2 nanofilms depends on the loading amount of Au. The rate constant for the photodegradation of the MB compound in the aqueous solutions with pure TiO 2 nanofilms is less than those with the prepared Au/TiO 2 nanofilms. Such behavior can be likely attributed to the activation of the photo-generated charge carriers and the increase of the electron–hole separation efficiency through localized surface plasmon resonance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00406090
- Volume :
- 636
- Database :
- Academic Search Index
- Journal :
- Thin Solid Films
- Publication Type :
- Academic Journal
- Accession number :
- 124420547
- Full Text :
- https://doi.org/10.1016/j.tsf.2017.06.051