TaTiO2-and NbTiO2-Mixed Oxides as Efficient Solar Photocatalysts : Preparation, Characterization, and Photocatalytic Activity
Joint Authors
Tade, Moses O.
Ang, Ming H.
Znad, Hussein
Source
International Journal of Photoenergy
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-08
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Ta/TiO2- and Nb/TiO2-mixed oxides photocatalysts were prepared by simple impregnation method at different TiO2 : Nb or Ta mass ratios of 1 : 0.1, 1 : 0.5, and 1 : 1, followed by calcination at 500∘C.
The prepared powders have been characterized by XRD, XPS, UV-Vis spectra, and SEM.
The photocatalytic activity was evaluated under natural solar light for decolorization and mineralization of azo dye Orange II solution.
The results showed that Nb/TiO2- and Ta/TiO2-mixed oxides have higher activity than the untreated TiO2 under natural solar light.
The maximum activity was observed for Nb/TiO2 sample (at mass ratio of 1 : 0.1), which is characterized by the smallest crystalline size (17.79 nm).
Comparing with the untreated TiO2, the solar decolorization and mineralization rates improved by about 140% and 237%, respectively, and the band gap reduced to 2.80 eV.
The results suggest that the crystal lattices of TiO2 powder are locally distorted by incorporating Nb5+ species into TiO2, forming a new band energy structure, which is responsible for the absorption in the visible region.
Unlike Ta/TiO2, the Nb/TiO2-mixed oxides can prevent the grain size growth of the treated TiO2, which is important to achieve high solar photoactivity.
American Psychological Association (APA)
Znad, Hussein& Ang, Ming H.& Tade, Moses O.. 2012. TaTiO2-and NbTiO2-Mixed Oxides as Efficient Solar Photocatalysts : Preparation, Characterization, and Photocatalytic Activity. International Journal of Photoenergy،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-480525
Modern Language Association (MLA)
Znad, Hussein…[et al.]. TaTiO2-and NbTiO2-Mixed Oxides as Efficient Solar Photocatalysts : Preparation, Characterization, and Photocatalytic Activity. International Journal of Photoenergy No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-480525
American Medical Association (AMA)
Znad, Hussein& Ang, Ming H.& Tade, Moses O.. TaTiO2-and NbTiO2-Mixed Oxides as Efficient Solar Photocatalysts : Preparation, Characterization, and Photocatalytic Activity. International Journal of Photoenergy. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-480525
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-480525