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Title: Photocatalytic and magnetic behaviors of BiFeO{sub 3} thin films deposited on different substrates

Single phase polycrystalline BiFeO{sub 3} thin films were grown on three different substrates via chemical solution deposition. Our results indicate that the band gap of as-prepared BiFeO{sub 3} films can be tuned (2.02–2.67 eV) by the grain size effects caused by the substrates. These BiFeO{sub 3} films show good photocatalytic properties by the degradation of Congo red solution under visible-light irradiation (λ{sub  }> 400 nm). Additionally, weak ferromagnetic behaviors can be observed at room temperature in all the films, which should be correlated to the destruction of the incommensurate cycloid spin structure of BiFeO{sub 3} phase and the coexistence of Fe{sup 3+} and Fe{sup 2+} as confirmed by X-ray photoelectron spectroscopy.
Authors:
; ; ; ;  [1]
  1. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)
Publication Date:
OSTI Identifier:
22402597
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AZO DYES; DEPOSITION; GRAIN SIZE; IRON IONS; IRRADIATION; MATHEMATICAL SOLUTIONS; PHOTOCATALYSIS; SUBSTRATES; SULFONIC ACIDS; THIN FILMS; X-RAY PHOTOELECTRON SPECTROSCOPY