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A Green, Low-Cost and Efficient Photocatalyst: Atomic-Hydrogenated α-FeO.
- Source :
- Catalysis Surveys from Asia; Sep2016, Vol. 20 Issue 3, p133-140, 8p
- Publication Year :
- 2016
-
Abstract
- The environmental-friendly hematite iron oxide (α-FeO) has important application prospects in the photocatalysis field owing to its narrow indirect band gap. Here, we report a band gap engineering of α-FeO by incorporation of electrochemically-generated atomic hydrogen at moderate conditions. The ultraviolet-visible spectra show the reduction of the α-FeO band gap after hydrogenation and the absorption region from 200-800 nm is enhanced, especially in the visible light region. First principles calculation reveals the mixing of the new hybrid energy level with the valence band top resulting in a decrease in the band gap of α-FeO. Further photocatalytic degradation experiments of dyes demonstrate that the photocatalytic efficiency of α-FeO can be greatly enhanced by the atomic hydrogen incorporation. The hydrogenated α-FeO can be easily recycled by magnets and has good photocatalytic stability. These findings offer possibilities for utilizing this inexpensive and earth-abundant oxide materials in the pollution controlling areas. [ABSTRACT FROM AUTHOR]
- Subjects :
- HEMATITE
PHOTOCATALYSIS
VISIBLE spectra
HYDROGENATION
ATOMIC hydrogen
Subjects
Details
- Language :
- English
- ISSN :
- 15711013
- Volume :
- 20
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Catalysis Surveys from Asia
- Publication Type :
- Academic Journal
- Accession number :
- 117354405
- Full Text :
- https://doi.org/10.1007/s10563-016-9214-x