Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold
Joint Authors
Gadiou, Roger
Velasco, Leticia F.
Ania, Conchi O.
Vix-Guterl, Cathie
Haro, Marta
Parmentier, Julien
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-26
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Abstract EN
The photoelectrochemical response and catalytic efficiency towards phenol photooxidation of mesoporous titania particles with spherical morphology have been explored.
The catalysts were synthesized in two different arrangements using carbon spheres in a dual role as support and morphology director: hollow spherical titania particles and dense structures where the titania shell is surrounding a carbon core.
Although the synthesized titania hollow spheres exhibited a similar photoelectrochemical behavior and optical properties than commercial P25, they showed a better photocatalytic response towards phenol photo-oxidation in terms of pollutant mineralization.
This behavior cannot be explained in terms of the crystallinity (found to be higher for P25) and has been attributed to both confinement effects in the mesoporosity of these catalysts as well as to the spherical morphology of titania particles.
The spherical arrangement of the titania surface would favor the fast motion of the charge carriers and minimize recombination processes.
On the other hand, no clear contribution of the carbon phase to the enhanced photocatalytic response, since quite similar performance is observed for the hollow spheres and the core/shell composite.
However, separation and filtration of the catalysts become easier for the carbon/titania composite, thereby improving the so-called practical efficiency.
American Psychological Association (APA)
Velasco, Leticia F.& Haro, Marta& Parmentier, Julien& Gadiou, Roger& Vix-Guterl, Cathie& Ania, Conchi O.. 2012. Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold. Journal of Catalysts،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-452151
Modern Language Association (MLA)
Velasco, Leticia F.…[et al.]. Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold. Journal of Catalysts No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-452151
American Medical Association (AMA)
Velasco, Leticia F.& Haro, Marta& Parmentier, Julien& Gadiou, Roger& Vix-Guterl, Cathie& Ania, Conchi O.. Tuning the Photocatalytic Activity and Optical Properties of Mesoporous TiO2 Spheres by a Carbon Scaffold. Journal of Catalysts. 2012. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-452151
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-452151