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A Novel Route Toward Fabrication of Twofold‐Shaped CeO 2 Dendrites
Author(s) -
Zhang Dongen,
Tong Zhiwei,
Li Shanzhong,
Zhang Xiaobo,
Ying Ailing
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800555
Subject(s) - chemistry , diethanolamine , cyclic voltammetry , thermal decomposition , electron transfer , fabrication , electrochemistry , dendrite (mathematics) , band gap , chemical engineering , nanotechnology , organic chemistry , electrode , optoelectronics , medicine , physics , alternative medicine , geometry , mathematics , pathology , materials science , engineering
Highly uniform twofold‐shaped CeO 2 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(NH 4 ) 2 (NO 3 ) 6 with CO(NH 2 ) 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 CeO 2 dendrites have a direct bandgap of 3.42 eV. The electrochemical characteristic of the CeO 2 dendrites structures have been studied by cyclic voltammetry. It was found that the CeO 2 dendrites can greatly improve the electron‐transfer ability. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)