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Effect of yttrium on the formation of nanostructured mesoporous CeO2

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Abstract

Mesoporous CeO2 and yttrium doped CeO2 (YDC) were prepared by a sol–gel process and characterized by a variety of techniques. XRD patterns showed that the undoped and doped samples had a cubic fluorite structure. The grain size decreased from 24.8 to 6.1 nm at 500 °C for pure CeO2 and YDC, respectively. N2 adsorption–desorption isotherms showed that the samples possessed typical mesopore characteristics. The BET specific surface area of the samples increased from 23.04 to 151.49 m2/g for 300 °C calcination after mesoporous CeO2 was doped with Y. It is found that the introduction of Y can inhibit the grain growth, and the presence of the pores also can be related to this obstacle to grain growth. These results are of great significance for the control of porous microstructure, crystallinity, and applications for the development of nanostructured mesoporous materials.

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Acknowledgments

This work was financially supported by the National Science Council of Taiwan, the Republic of China, grant No. NSC 100-2622-E-020-004-CC3, NSC 99-2622-E-020-002-CC3 and NSC 98-2221-E-020-020, which are gratefully acknowledged.

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  1. Department of Mechanical Engineering, National Pingtung University of Science and Technology, Neipu, Pingtung, 912, Taiwan

    Lay Gaik Teoh

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  1. Lay Gaik Teoh
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Correspondence to Lay Gaik Teoh.

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Teoh, L.G. Effect of yttrium on the formation of nanostructured mesoporous CeO2 . J Sol-Gel Sci Technol 62, 47–51 (2012). https://doi.org/10.1007/s10971-012-2681-2

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  • DOI: https://doi.org/10.1007/s10971-012-2681-2

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