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Title: A novel Bi-based oxybromide SrBiO{sub 2}Br: Synthesis, optical property and photocatalytic activity

Highlights: • SrBiO{sub 2}Br was first explored as a novel photocatalyst. • SrBiO{sub 2}Br has been successfully synthesized by a solid state reaction. • We systematically synthesized SrBiO{sub 2}Br in different temperature. • SrBiO{sub 2}Br calcinated at 700 °C exhibited the highest photocatalytic activity. - Abstract: A novel Bi-based photocatalyst SrBiO{sub 2}Br 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). SrBiO{sub 2}Br 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 SrBiO{sub 2}Br can be used as photocatalysts under ultraviolet (UV) light and visible light irradiation (λ > 400 nm). The results revealed that SrBiO{sub 2}Br calcinated at 700 °C exhibited the highest photocatalytic activity among the obtained SrBiO{sub 2}Br samples.
Authors:
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Publication Date:
OSTI Identifier:
22475747
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 64; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH COMPOUNDS; BROMINE COMPOUNDS; DENSITY FUNCTIONAL METHOD; OPTICAL PROPERTIES; OXIDES; OXYBROMIDES; OXYGEN COMPOUNDS; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; SOLIDS; SPECTRA; STRONTIUM COMPOUNDS; SYNTHESIS; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION