Band gap tuning of Na{sub 1-x}La{sub x}Ta{sub 1-x}Cr{sub x}O{sub 3} for H{sub 2} generation from water under visible light irradiation
Journal Article
·
· Journal of Applied Physics
- Photocatalytic Materials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
Semiconductors of Na{sub 1-x}La{sub x}Ta{sub 1-x}Cr{sub x}O{sub 3}(x=0-1.00) were prepared with conventional solid state reactions method. The crystal structure changed from monoclinic (x<=0.60) to orthorhombic (x>=0.70) with the modulation of chemical composition. H{sub 2} generation under visible light irradiation (lambda>420 nm) was successfully obtained with the tuning of band structures of Na{sub 1-x}La{sub x}Ta{sub 1-x}Cr{sub x}O{sub 3}. The highest performance for H{sub 2} generation (4.5 mumol/h) was observed at x=0.4 with apparent quantum yield of 0.5%. The visible light harvesting as well as the photocatalysis was further discussed based on the electronic structures thereof.
- OSTI ID:
- 21361876
- Journal Information:
- Journal of Applied Physics, Vol. 106, Issue 7; Other Information: DOI: 10.1063/1.3243282; (c) 2009 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHROMIUM OXIDES
CRYSTAL GROWTH
ELECTRONIC STRUCTURE
ENERGY GAP
HYDROGEN
IRRADIATION
LANTHANUM COMPOUNDS
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
PHOTOCATALYSIS
PHOTOCHEMISTRY
SEMICONDUCTOR MATERIALS
SODIUM COMPOUNDS
TANTALUM COMPOUNDS
ULTRAVIOLET SPECTRA
VISIBLE RADIATION
VISIBLE SPECTRA
WATER
ALKALI METAL COMPOUNDS
CATALYSIS
CHALCOGENIDES
CHEMISTRY
CHROMIUM COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROGEN COMPOUNDS
MATERIALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHROMIUM OXIDES
CRYSTAL GROWTH
ELECTRONIC STRUCTURE
ENERGY GAP
HYDROGEN
IRRADIATION
LANTHANUM COMPOUNDS
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
PHOTOCATALYSIS
PHOTOCHEMISTRY
SEMICONDUCTOR MATERIALS
SODIUM COMPOUNDS
TANTALUM COMPOUNDS
ULTRAVIOLET SPECTRA
VISIBLE RADIATION
VISIBLE SPECTRA
WATER
ALKALI METAL COMPOUNDS
CATALYSIS
CHALCOGENIDES
CHEMISTRY
CHROMIUM COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROGEN COMPOUNDS
MATERIALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SPECTRA
TRANSITION ELEMENT COMPOUNDS