Physicochemical Study of Photocatalytic Activity of TiO2 Supported Palygorskite Clay Mineral
Joint Authors
Maury, Francis
Rhouta, Benaissa
Bouna, Lahcen
Source
International Journal of Photoenergy
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-04-14
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
This study deals with the influence of physicochemical parameters, namely, the photocatalyst loading, dye concentration, and pH of polluted solutions, on the degradation efficiency of Orange G (OG) solutions containing TiO2 nanoparticles supported on palygorskite clay mineral (TiO2-Pal).
The TiO2 photocatalyst attached to natural palygorskite fibers was elaborated by colloidal sol-gel route.
It exhibits the anatase structure that is the most photoactive crystallographic form.
The highest performances of supported photocatalyst on OG degradation were found using an optimum amount of TiO2-Pal around 0.8 g·L−1, which corresponds properly to ca.
0.4 g·L−1 of TiO2.
This amount is interestingly lower than the 2.5 g·L−1 generally reported when using pure unsupported TiO2 powder.
The photodegradation rate increases by decreasing OG initial concentration, and it was found significantly higher when the OG solution is either acidic (pH<4) or basic (pH≈11).
For OG concentrations in the range 5×10-6– 5×10-4 M, the kinetic law of the OG degradation in presence of TiO2-Pal is similar to that reported for unsupported TiO2 nanopowder.
It follows a Langmuir-Hinshelwood model with a first-order reaction and an apparent rate constant of about 2.9×10-2 min−1.
American Psychological Association (APA)
Bouna, Lahcen& Rhouta, Benaissa& Maury, Francis. 2013. Physicochemical Study of Photocatalytic Activity of TiO2 Supported Palygorskite Clay Mineral. International Journal of Photoenergy،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-500317
Modern Language Association (MLA)
Bouna, Lahcen…[et al.]. Physicochemical Study of Photocatalytic Activity of TiO2 Supported Palygorskite Clay Mineral. International Journal of Photoenergy No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-500317
American Medical Association (AMA)
Bouna, Lahcen& Rhouta, Benaissa& Maury, Francis. Physicochemical Study of Photocatalytic Activity of TiO2 Supported Palygorskite Clay Mineral. International Journal of Photoenergy. 2013. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-500317
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-500317