![](/images/graphics-bg.png)
Thickness Dependent on Photocatalytic Activity of Hematite Thin Films
Joint Authors
Source
International Journal of Photoenergy
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-12-11
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Hematite (Fe2O3) thin films with different thicknesses are fabricated by the rf magnetron sputtering deposition.
The effects of film thicknesses on the photocatalytic activity of hematite films have been investigated.
Hematite films possess a polycrystalline hexagonal structure, and the band gap decreases with an increase of film thickness.
Moreover, all hematite films exhibit good photocatalytic ability under visible-light irradiation; the photocatalytic activity of hematite films increases with the increasing film thickness.
This is because the hematite film with a thicker thickness has a rougher surface, providing more reaction sites for photocatalysis.
Another reason is a lower band gap of a hematite film would generate more electron-hole pairs under visible-light illumination to enhance photocatalytic efficiency.
Experimental data are well fitted with Langmuir-Hinshelwood kinetic model.
The photocatalytic rate constant of hematite films ranges from 0.052 to 0.068 min-1.
This suggests that the hematite film is a superior photocatalyst under visible-light irradiation.
American Psychological Association (APA)
Chen, Yen-Hua& Tu, Kuo-Jui. 2011. Thickness Dependent on Photocatalytic Activity of Hematite Thin Films. International Journal of Photoenergy،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-513209
Modern Language Association (MLA)
Chen, Yen-Hua& Tu, Kuo-Jui. Thickness Dependent on Photocatalytic Activity of Hematite Thin Films. International Journal of Photoenergy No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-513209
American Medical Association (AMA)
Chen, Yen-Hua& Tu, Kuo-Jui. Thickness Dependent on Photocatalytic Activity of Hematite Thin Films. International Journal of Photoenergy. 2011. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-513209
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-513209