Journal
MATERIALS RESEARCH BULLETIN
Volume 64, Issue -, Pages 405-409Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2015.01.011
Keywords
Oxides; Optical properties; Catalytic properties
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Funding
- National Natural Science Foundations of China [51302251, 51172245, 51322213]
- Fundamental Research Funds for the Central Universities [2652013052, 53200959771]
- National High Technology Research and Development Program (863 Program) of China [2012AA06A109]
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A novel Bi-based photocatalyst SrBiO2Br with layered structure was successfully synthesized via a solid state reaction method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectra (DRS). SrBiO2Br has an indirect-transition optical band-gap of 2.58 eV. Density functional calculations revealed that conduction band (CB) were composed of the Bi 6p and Br 4s orbitals, and valence band (VB) were occupied by Br 4p and O 2p. The photodecomposition of rhodamine-B (RhB) experiments demonstrated SrBiO2Br can be used as photocatalysts under ultraviolet (UV) light and visible light irradiation (lambda > 400 nm). The results revealed that SrBiO2Br calcinated at 700 degrees C exhibited the highest photocatalytic activity among the obtained SrBiO2Br samples. (C) 2015 Elsevier Ltd. All rights reserved.
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