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- Lee, Jae Sung
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Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation
- Alternative Title
- Enhanced photochemical properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible-light irradiation
- Author(s)
- Kim, Hyun Gyu, Borse, Pramod H., Jang, Jum Suk, Jeong, Euh Duck, Lee, Jae Sung
- Issued Date
- 2008-03
- Citation
- MATERIALS LETTERS, v.62, no.8-9, pp.1427 - 1430
- Abstract
-
The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2-xWxO9 with an optimum composition of x = 0.15 exhibited a red shifted (0.14 eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light ((lambda >= 420 nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2-xWxO9 (0
- Publisher
- ELSEVIER SCIENCE BV
- ISSN
- 0167-577X
- Keyword (Author)
- perovskites, photoelectrochemical, photocatalysis, solar energy materials
- Keyword
- WATER, PHOTOCATALYSIS
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