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Preparation and characterization of mesoporous ceria–zirconia–alumina nanocomposite with high hydrothermal stability

Published online by Cambridge University Press:  31 January 2011

Md. Hasan Zahir ,
Yumi H. Ikuhara ,
Shinji Fujisaki ,
Koji Sato ,
Takayuki Nagano  and
Yuji Iwamoto
Md. Hasan Zahir*
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
Yumi H. Ikuhara
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
Shinji Fujisaki
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
Koji Sato
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
Takayuki Nagano
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
Yuji Iwamoto
Affiliation:
Japan Fine Ceramics Center, Hybrid Process Group, Nagoya 456-8587, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

CeO2–ZrO2–γ-Al2O3 mixed oxides with different molar compositions have been synthesized by the sol-gel method using nitrate–alkoxide precursors. Some relationships between the molar composition of the ternary systems and their textural and structural properties are presented. CeO2–ZrO2–γ-Al2O3 mixed oxides have been studied and characterized using x-ray diffraction, transmission electron microscopy, and Raman spectroscopic analyses. By complete porosity analyses of all samples before and after hydrothermal (up to 75% steam) treatment at 500 °C, we have been able to optimize a highly hydrothermally stable CeO2–ZrO2–γ-Al2O3 system with a molar ratio of 10:10:80 mol%. γ-Al2O3 alone and CeO2-doped as well as ZrO2-doped γ-Al2O3 were also investigated by the hydrothermal treatment, and their steam-sensitive properties have been compared with those of the ternary CeO2–ZrO2–γ-Al2O3 system.

Keywords

HydrothermalPorositySol-gel
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3201 - 3209
Copyright
Copyright © Materials Research Society 2007

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