Influence of the synthesis procedures on the properties of nano-sized ceria powders
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Publication Details
Author list: Supakanapitak S., Boonamnuayvitaya V., Jarudilokkul S.
Publisher: Taylor and Francis Group
Publication year: 2012
Journal: Journal of Chemical Engineering of Japan (0021-9592)
Volume number: 45
Issue number: 7
Start page: 544
End page: 550
Number of pages: 7
ISSN: 0021-9592
eISSN: 1881-1299
Languages: English-Great Britain (EN-GB)
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Abstract
Nano-sized CeO 2 powders have been synthesized using three different methods of emulsion: (1) reversed micelle (RM); (2) emulsion liquid membrane (ELM); and (3) colloidal emulsion aphrons (CEAs) with the same starting materials. The powder was calcined at 500ฐC to obtain CeO 2. The effect of the preparation procedure on the crystallite size, surface area, and the morphology of the prepared powders have been investigated. The results show that CeO 2 powders prepared by different methods all possess the same cubic fluorite structure and highly crystalline. The average particle size and the specific surface area of the powders from the three methods are in the range of 4-10 nm and 5.32-145.73 m2/g, respectively. The CeO 2 powders synthesized by CEAs method are the smallest average particle size and the highest surface area. Finally, the CeO 2 prepared by the CEAs method using different cerium sources and surfactant types have been studied. It was found that the surface tensions of cerium solution and the type of surfactant affect the particle size of CeO 2. ฉ 2012 The Society of Chemical Engineers, Japan.
Keywords
CeO 2, Colloidal emulsion aphrons, Emulsions liquid membrane, Reversed micelle
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