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Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO2 films.
- Source :
-
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2008 Mar 18; Vol. 24 (6), pp. 2695-8. Date of Electronic Publication: 2008 Feb 05. - Publication Year :
- 2008
-
Abstract
- Epitaxial anatase thin films were grown on single-crystal LaAlO3 substrates by a sol-gel process. The epitaxial relationship between TiO2 and LaAlO3 was found to be [100]TiO2||[100]LaAlO3 and (001)TiO2||(001)LaAlO3 based on X-ray diffraction and a high-resolution transmission electron microscopy. The epitaxial anatase films show significantly improved photocatalytic properties, compared with polycrystalline anatase film on fused silica substrate. The increase in the photocatalytic activity of epitaxial anatase films is explained by enhanced charge carrier mobility, which is traced to the decreased grain boundary density in the epitaxial anatase film.
Details
- Language :
- English
- ISSN :
- 0743-7463
- Volume :
- 24
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Langmuir : the ACS journal of surfaces and colloids
- Publication Type :
- Academic Journal
- Accession number :
- 18247637
- Full Text :
- https://doi.org/10.1021/la702379y