Effect of Preparation Method on Surface Area and Crystalline Form of CeO2-ZrO2 Solid Solution
来源期刊:JOURNAL OF RARE EARTHS2004年第6期
论文作者:郭杨龙 郭耘 王晓红 卢冠忠 刘晓晖 张志刚 王筠松
Key words:reverse microemulsion method; preparation; CeO2-ZrO2 solid solution; high surface area; crystalline form; rare earths;
Abstract: The CeO2-ZrO2 solid solutions were prepared by a reverse microemulsion method. The effect of preparation parameters on the surface area and crystalline form of the solid solutions were studied by the BET surface area and XRD analysis. The studies indicate that the separation of the microemulsion phase during the preparation procedure can decrease the specific surface area of sample, adding hydrogen peroxide in the matrix solution can increase the specific surface area and stability of sample. The surface area of sample calcined at 550 ℃ for 5 h is 149 m2·g-1, and that calcined at 900 ℃ for 6 h is 88 m2·g-1.The sample with tetragonal symmetry Ce0.5Zr0.5O2 phase has a higher stability.
郭杨龙1,郭耘1,王晓红1,卢冠忠1,刘晓晖1,张志刚1,王筠松1
(1.Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China)
Abstract:The CeO2-ZrO2 solid solutions were prepared by a reverse microemulsion method. The effect of preparation parameters on the surface area and crystalline form of the solid solutions were studied by the BET surface area and XRD analysis. The studies indicate that the separation of the microemulsion phase during the preparation procedure can decrease the specific surface area of sample, adding hydrogen peroxide in the matrix solution can increase the specific surface area and stability of sample. The surface area of sample calcined at 550 ℃ for 5 h is 149 m2·g-1, and that calcined at 900 ℃ for 6 h is 88 m2·g-1.The sample with tetragonal symmetry Ce0.5Zr0.5O2 phase has a higher stability.
Key words:reverse microemulsion method; preparation; CeO2-ZrO2 solid solution; high surface area; crystalline form; rare earths;
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