Hydrothermal synthesis of bismuth ferrite with controllable phase structure, morphology and visible light photocatalytic activities

Hydrothermal synthesis of bismuth ferrite with controllable phase structure, morphology and... Bismuth ferrites powders have been successfully synthesized via a facile hydrothermal method. Phase structure, morphology and surface area of as-prepared powders are investigated by using X-ray diffraction, field emission scanning electron microscope and Brunauer–Emmett–Teller (BET) method. The effects of the Bi3+/Fe3+ precursor molar ratio and the reaction time on the phase structure evolution of bismuth ferrite are systematically studied. Three types of bismuth ferrite powders, that is, sheet-like Bi2Fe4O9, sheet-like Bi2Fe4O9 hybrid with Bi25FeO40 and BiFeO3, and cuboid-like Bi2Fe4O9 with large exposed (001) surface, are obtained by tailoring the Bi3+/Fe3+ precursor molar ratio from 1.5:1 to 1:2 and the reaction time from 4 to 12 h during hydrothermal process. A reasonable mechanism for phase structure evolution is proposed and discussed on the basis of our results. Furthermore, the optical properties and photocatalytic activities of those samples are also investigated. All these powders have small bandgap energy and the bandgap reduces with the increasing size. The differences in photocatalytic activities by the degradation of Rhodamine B are well explained from phase structure and morphology. Our studies indicate that a facile hydrothermal method can be well made use of to design and synthesize bismuth ferrite powders with controllable phase structure, morphology and photocatalytic behaviors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Hydrothermal synthesis of bismuth ferrite with controllable phase structure, morphology and visible light photocatalytic activities

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Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-017-8451-8
Publisher site
See Article on Publisher Site

Abstract

Bismuth ferrites powders have been successfully synthesized via a facile hydrothermal method. Phase structure, morphology and surface area of as-prepared powders are investigated by using X-ray diffraction, field emission scanning electron microscope and Brunauer–Emmett–Teller (BET) method. The effects of the Bi3+/Fe3+ precursor molar ratio and the reaction time on the phase structure evolution of bismuth ferrite are systematically studied. Three types of bismuth ferrite powders, that is, sheet-like Bi2Fe4O9, sheet-like Bi2Fe4O9 hybrid with Bi25FeO40 and BiFeO3, and cuboid-like Bi2Fe4O9 with large exposed (001) surface, are obtained by tailoring the Bi3+/Fe3+ precursor molar ratio from 1.5:1 to 1:2 and the reaction time from 4 to 12 h during hydrothermal process. A reasonable mechanism for phase structure evolution is proposed and discussed on the basis of our results. Furthermore, the optical properties and photocatalytic activities of those samples are also investigated. All these powders have small bandgap energy and the bandgap reduces with the increasing size. The differences in photocatalytic activities by the degradation of Rhodamine B are well explained from phase structure and morphology. Our studies indicate that a facile hydrothermal method can be well made use of to design and synthesize bismuth ferrite powders with controllable phase structure, morphology and photocatalytic behaviors.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: Dec 23, 2017

References

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