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Title: Photocatalytic performances of BiFeO{sub 3} particles with the average size in nanometer, submicrometer, and micrometer

Highlights: • Three different synthesis routes have been taken to successfully prepare the BiFeO{sub 3} particles with the different morphologies and average size in 50, 500 nm, and 15 μm. • For photodegradation of dyes under visible irradiation in the presence of BiFeO{sub 3}, the photocatalytic efficiency increases quickly with the decrease in size. • The enhanced photocatalytic efficiency of BiFeO{sub 3} nanoparticles may attribute to more surface active catalytic-sites and shorter distances carriers have to migrate to the surface reaction sites. - Abstract: Three different synthesis routes were taken to successfully prepare the BiFeO{sub 3} particles with the different morphologies and average size in 50, 500 nm, and 15 μm, respectively. The crystal structure was recognized to be a distorted rhombohedral one with the space group R3c. With the decrease in particle size, obvious decrease in peak intensity and redshift in peak position were observed for the Raman active bands. The narrow band gap was determined from the UV–vis absorption spectra, indicating the semiconducting nature of the BiFeO{sub 3}. For photodegradation of dyes under visible irradiation in the presence of BiFeO{sub 3}, the photocatalytic efficiency increased quickly with the decrease in size which may attribute to more surface activemore » catalytic-sites and shorter distances carriers had to migrate to the surface reaction sites.« less
Authors:
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Publication Date:
OSTI Identifier:
22345226
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 50; Other Information: Copyright (c) 2013 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; ABSORPTION SPECTRA; CERAMICS; EFFICIENCY; IRRADIATION; NANOPARTICLES; PARTICLE SIZE; PEAKS; PHOTOCATALYSIS; SOL-GEL PROCESS; SPACE GROUPS; SURFACES; SYNTHESIS; TRIGONAL LATTICES; X-RAY DIFFRACTION