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Controllable Synthesis of Different Bismuth Ferrites by a PVA Modified Hydrothermal Method and Photocatalytic Characterization

Published online by Cambridge University Press:  22 May 2013

Tong Tong ,
Dengren Jin  and
Jinrong Cheng
Tong Tong
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Dengren Jin
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Jinrong Cheng*
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
*
*corresponding author: [email protected]
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Abstract

Bismuth ferrites crystallites were synthesized by a polyvinyl alcohol (PVA) modified hydrothermal method. X-ray diffraction (XRD) analysis indicated that the pure phase of Bi25FeO40, BiFeO3 and Bi2Fe4O9 were synthesized with initial Bi/Fe ratio of 1:1 at the temperature of 200°C for 24 h, using NaOH concentration of 2, 5 and 10 M, respectively. With addition of PVA, the individual Bi-Fe oxides could be existed in a more wide range of processing parameters. The phase evolution of bismuth ferrites in the process of hydrothermal reactions was discussed. Moreover, photocatalytic properties of the bismuth ferrites crystallites were explored. The results showed that they possessed band gaps of about 2.0 eV and performed good degradation effect at visible light region.

Keywords

hydrothermalphase transformationcatalytic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1552: Symposium S – Nanostructured Metal Oxides for Advanced Applications , 2013 , pp. 35 - 41
Copyright
Copyright © Materials Research Society 2013 

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References

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