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Title: Room-temperature solid state synthesis of ZnO/Bi{sub 2}O{sub 3} heterojunction and their solar light photocatalytic performance

Highlights: • ZnO/Bi{sub 2}O{sub 3} hierarchical nanostructures were synthesized via a solid-state reaction. • The amount of Bi{sub 2}O{sub 3} plays an important role in controlling the morphology. • The amount of Bi{sub 2}O{sub 3} plays an important role in controlling the photocatalysis. - Abstract: ZnO/Bi{sub 2}O{sub 3} heterojunction was prepared by solid state reaction method at room temperature. The as-prepared nanostructures were characterized as the assembled nanosheets of ZnO on which Bi{sub 2}O{sub 3} nanoparticles were well dispersed. Further studies revealed that the morphology and photocatalytic property could be regulated by tuning the amount of Bi{sub 2}O{sub 3}. The introduction of Bi{sub 2}O{sub 3} can lead to the enhancement of solar light absorption, and the 5% ZnO/Bi{sub 2}O{sub 3} samples exhibited the best photocatalytic activity under the solar light irradiation. The excellent photocatalytic performances could be ascribed to the synergistic effects of the hierarchical nanostructures and the effective separation of photogenerated carriers. Moreover, the hydroxyl radicals (·OH) are found to be the main active species generated in the oxidation reaction of RhB over ZnO/Bi{sub 2}O{sub 3} photocatalyst. Therefore, our work demonstrated a facile way to prepare hierarchical nanostructures with excellent photocatalytic performance using solid state method at room temperature.
Authors:
 [1] ;  [2] ;  [3]
  1. Shaanxi Province Thin Film Technology and Optical Test Open Key Laboratory, School of Photoelectrical Engineering, Xi’an Technological University, Xi’an 710032 (China)
  2. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048 (China)
  3. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072 (China)
Publication Date:
OSTI Identifier:
22475717
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 64; Other Information: Copyright (c) 2014 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; BISMUTH OXIDES; CARRIERS; HETEROJUNCTIONS; HYDROXYL RADICALS; IRRADIATION; MICROSTRUCTURE; NANOPARTICLES; NANOSTRUCTURES; OXIDATION; PERFORMANCE; PHOTOCATALYSIS; SOLIDS; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; VISIBLE RADIATION; ZINC OXIDES