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Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO <inf>2</inf> films

Jung, HS and Lee, JK and Lee, J and Kang, BS and Jia, Q and Nastasi, M and Noh, JH and Cho, CM and Yoon, SH (2008) Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO <inf>2</inf> films. Langmuir, 24 (6). 2695 - 2698. ISSN 0743-7463

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Abstract

Epitaxial anatase thin films were grown on single-crystal LaAlO3 substrates by a sol-gel process. The epitaxial relationship between TiO 2 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. © 2008 American Chemical Society.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Jung, HS
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Lee, J
Kang, BS
Jia, Q
Nastasi, M
Noh, JH
Cho, CM
Yoon, SH
Centers: Other Centers, Institutes, or Units > Petersen Institute of NanoScience and Engineering
Date: 18 March 2008
Date Type: Publication
Journal or Publication Title: Langmuir
Volume: 24
Number: 6
Page Range: 2695 - 2698
DOI or Unique Handle: 10.1021/la702379y
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0743-7463
MeSH Headings: Aluminum Compounds--chemistry; Gels--chemistry; Lanthanum--chemistry; Membranes, Artificial; Oxides--chemistry; Photochemistry; Surface Properties; Titanium--chemistry; X-Ray Diffraction
PubMed ID: 18247637
Date Deposited: 30 Oct 2014 16:30
Last Modified: 02 Feb 2019 21:55
URI: http://d-scholarship.pitt.edu/id/eprint/23431

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