A surfactant and template-free route for synthesizing ceria nanocrystals with tunable morphologies

Wei Wang; Jane Y. Howe; Yuan Li; Xiaofeng Qiu; David C. Joy; M. Parans Paranthaman; Mitchel J. Doktycz; Baohua Gu

doi:10.1039/C0JM00982B

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Journal of Materials Chemistry

Issue 36, 2010

Journal of Materials Chemistry was published between 1991 and 2012. From issue 1, 2013, it was replaced by three new journals: Journal of Materials Chemistry A, B and C

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Paper

A surfactant and template-free route for synthesizing ceria nanocrystals with tunable morphologies

Wei Wang,*^a Jane Y. Howe,^b Yuan Li,^a Xiaofeng Qiu,^c David C. Joy,^e M. Parans Paranthaman,^c Mitchel J. Doktycz^d^e and Baohua Gu^a

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Corresponding authors

Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, USA
E-mail: wangw@ornl.gov ;
Fax: (+865)241-5245 ;
Tel: (+865)576-3989

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, USA

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, USA

Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, USA

Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, USA

J. Mater. Chem., 2010,20, 7776-7781

DOI: 10.1039/C0JM00982B
Received 08 Apr 2010, Accepted 02 Jul 2010
First published online 05 Aug 2010

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Abstract
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Nanosized crystalline ceria (CeO₂) is synthesized through a surfactant- and template-free solution precipitation-hydrothermal method. We report that pure CeO₂ nanocrystals with shapes consisting of nanospheres, nanowires, and nanorods can be obtained simply by varying the anionic composition or the type of counter ion, such as chloride, nitrate and phosphate in solution before the hydrothermal treatment. The shape-controlling effect of these anions is explained by the selective interaction of these ions with specific facets of CeO₂, leading to the growth of CeO₂ nanocrystals with varying morphologies. Unlike techniques that require the use of organic and inorganic additives or templates, the new methodology represents a simple yet effective means to fabricate CeO₂ nanowires or nanoparticles with the potential to be further tuned to provide a morphologically controllable route for tailoring and designing CeO₂ nanomaterials for a wide variety of applications.

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Wei Wang
Jane Y. Howe
Yuan Li
Xiaofeng Qiu
David C. Joy
M. Parans Paranthaman
Mitchel J. Doktycz
Baohua Gu

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