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Photocatalytic activity of sol–gel derived titania converted into nanocrystalline powders by supercritical drying
- Source :
-
Journal of Photochemistry & Photobiology A: Chemistry . May2005, Vol. 172 Issue 1, p19-26. 8p. - Publication Year :
- 2005
-
Abstract
- Abstract: Nanocrystalline (14–18nm) anatase TiO2 powders with high photocatalytic activity are synthesized by a sol–gel method followed by supercritical drying in isopropanol. The photocatalytic behavior is studied in the model reaction of phenol photodegradation in water. The relationship between photoactivity, crystal structure, texture, charge-carrier lifetimes, bandgap energies and thermal treatment of products is discussed. The effective method of synthesis of photocatalysts based on TiO2—sol–gel method followed by supercritical drying in isopropanol is presented. It shows, that the obtained powders can be used in photocatalytical depollution without additional thermal treatment. [Copyright &y& Elsevier]
- Subjects :
- *TITANIUM dioxide
*PHOTOCATALYSIS
*NANOCRYSTALS
*POWDERS
Subjects
Details
- Language :
- English
- ISSN :
- 10106030
- Volume :
- 172
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Photochemistry & Photobiology A: Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 17674365
- Full Text :
- https://doi.org/10.1016/j.jphotochem.2004.11.004