Enhanced Water Splitting by Fe 2 O 3 ‐TiO 2 ‐FTO Photoanode with Modified Energy Band Structure

The effect of TiO 2 layer applied to the conventional Fe 2 O 3 /FTO photoanode to improve the photoelectrochemical performance was assessed from the viewpoint of the microstructure and energy band structure. Regardless of the location of the TiO 2 layer in the photoanodes, that is, Fe 2 O 3 /TiO 2 /...

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Bibliographic Details
Published in:TheScientificWorld 2013-01, Vol.2013 (1)
Main Authors: Noh, Eul, Noh, Kyung-Jong, Yun, Kang-Seop, Kim, Bo-Ra, Jeong, Hee-June, Oh, Hyo-Jin, Jung, Sang-Chul, Kang, Woo-Seung, Kim, Sun-Jae
Format: Article
Language:English
Subjects:
Anatase
Band structure of solids
Constituents
Energy resources
Glass
Heat treatment
Interlayers
Nanoparticles
Nanostructured materials
Natural gas
Photoanodes
Titanium dioxide
Water splitting
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Summary:The effect of TiO 2 layer applied to the conventional Fe 2 O 3 /FTO photoanode to improve the photoelectrochemical performance was assessed from the viewpoint of the microstructure and energy band structure. Regardless of the location of the TiO 2 layer in the photoanodes, that is, Fe 2 O 3 /TiO 2 /FTO or TiO 2 /Fe 2 O 3 /FTO, high performance was obtained when α ‐Fe 2 O 3 and H‐TiNT/anatase‐TiO 2 phases existed in the constituent Fe 2 O 3 and TiO 2 layers after optimized heat treatments. The presence of the Fe 2 O 3 nanoparticles with high uniformity in the each layer of the Fe 2 O 3 /TiO 2 /FTO photoanode achieved by a simple dipping process seemed to positively affect the performance improvement by modifying the energy band structure to a more favorable one for efficient electrons transfer. Our current study suggests that the application of the TiO 2 interlayer, together with α ‐Fe 2 O 3 nanoparticles present in the each constituent layers, could significantly contribute to the performance improvement of the conventional Fe 2 O 3 photoanode.
ISSN:2356-6140
1537-744X
DOI:10.1155/2013/723201