A Novel Route Toward Fabrication of Twofold-Shaped CeO2 Dendrites

Highly uniform twofold‐shaped CeO2 dendrites were successfully prepared in large quantities by using an approach that involves the thermal decomposition of the precursor. The precursor with an average size of 10 μm was prepared from the reaction of Ce(NH4)2(NO3)6 with CO(NH2)2 at 160 °C in a water/d...

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Bibliographic Details
Published in:European Journal of Inorganic Chemistry 2008-12, Vol.2008 (35), p.5476-5481
Main Authors: Zhang, Dongen, Tong, Zhiwei, Li, Shanzhong, Zhang, Xiaobo, Ying, Ailing
Format: Article
Language:English
Subjects:
Absorption
Crystal growth
Cyclic voltammetry
Nanotechnology
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Summary:Highly uniform twofold‐shaped CeO2 dendrites were successfully prepared in large quantities by using an approach that involves the thermal decomposition of the precursor. The precursor with an average size of 10 μm was prepared from the reaction of Ce(NH4)2(NO3)6 with CO(NH2)2 at 160 °C in a water/diethanolamine (DEA) complex solution. The influence of DEA on dendrite formation is discussed. The dendritic pattern of precursor is almost retained in the as‐prepared product. The optical absorption spectrum indicates that the CeO2 dendrites have a direct bandgap of 3.42 eV. The electrochemical characteristic of the CeO2 dendrites structures have been studied by cyclic voltammetry. It was found that the CeO2 dendrites can greatly improve the electron‐transfer ability. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) Highly uniform twofold‐shaped CeO2 dendrites were prepared by using an approach that involves the thermal decomposition of the precursor. Precursors (average size 10 μm) were prepared from Ce(NH4)2(NO3)6 and CO(NH2)2 in a H2O/diethanolamine solution. DEA plays an important role in the formation of the products. The dendritic pattern of the precursor is almost retained in the CeO2 product.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.200800555