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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 12
BKCSDE 30(12)
December 20, 2009 

 
Title
Formation of Layered Bi5Ti3FeO15 Perovskite in Bi2O3>-TiO2-Fe2O3 Containing System
Author
Pramod H Borse, Sang Su Yoon, Jum Suk Jang, Jae Sung Lee, Tae Eun Hong, Euh Duck Jeong, Mi Sook Won, Ok Sang Jung, Yoon Bo Shim, Hyun Gyu Kim*
Keywords
Bi5Ti3FeO15, Aurivillius phase, Polymerized complex method, Activation energy, Crystallization behavior
Abstract
Structural and thermo-analytical studies were carried out to understand the phase formation kinetics of the single phase Bi5Ti3FeO15 (BTFO) nanocrystals in Bi2O3-Fe2O3-TiO2, during the polymerized complex (PC) synthesis method. The crystallization of Aurivillius phase Bi5Ti3FeO15 layered perovskite was found to be initiated and achieved under the temperature conditions in the range of ~800 to 1050 oC. The activation energy for grain growth of Bi5Ti3FeO15 nanocrystals (NCs) was very low in case of NCs formed by PC (2.61 kJ/mol) than that formed by the solid state reaction (SSR) method (10.9 kJ/mol). The energy involved in the phase transformation of Aurivillius phase Bi5Ti3FeO15 from Bi2O3-Fe2O3-TiO2 system was ~ 69.8 kJ/mol. The formation kinetics study of Bi5Ti3FeO15 synthesized by SSR and PC methods would not only render a large impact in the nanocrystalline material development but also in achieving highly efficient visible photocatalysts.
Page
3011 - 3015
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