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Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO2 films
- Authors
- Jung, Hyun Suk; Lee, Jung-Kun; Lee, Jaegab; Kang, Bo Soo; Jia, Quanxi; Nastasi, Michael; Noh, Jun Hong; Cho, Chin-Moo; Yoon, Sung Hoon
- Issue Date
- Mar-2008
- Publisher
- AMER CHEMICAL SOC
- Keywords
- THIN-FILMS; PHOTOCATALYTIC ACTIVITY; EFFICIENCY; TITANIA; LAALO3; INTERFACES; CONVERSION; ELECTRODE
- Citation
- LANGMUIR, v.24, no.6, pp.2695 - 2698
- Indexed
- SCIE
SCOPUS
- Journal Title
- LANGMUIR
- Volume
- 24
- Number
- 6
- Start Page
- 2695
- End Page
- 2698
- ISSN
- 0743-7463
- 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 vertical bar vertical bar [100]LAlO3 and (001)TiO2 vertical bar vertical bar(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.
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Related Researcher
- Kang, Bo Soo
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY (DEPARTMENT OF APPLIED PHYSICS)