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CeO 2 Nanorod–TiO 2 Nanotube Hybrid Nanostructure
Author(s) -
Yang Yang,
Wang Xiaohui,
Sun Changku,
Li Longtu
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03892.x
Subject(s) - nanorod , materials science , nucleation , electric field , nanostructure , nanotube , current density , nanotechnology , amorphous solid , crystallite , chemical engineering , electrolyte , electrochemistry , field electron emission , electrode , carbon nanotube , chemistry , metallurgy , electron , crystallography , physics , organic chemistry , quantum mechanics , engineering
CeO 2 nanorods with a polycrystalline structure were prepared by galvanostatic electrodeposition using TiO 2 nanotube arrays as templates. The heterogeneous nucleation and subsequent growth of CeO 2 nanorods are an electric field‐assisted process, which depend upon the current density and electrolyte concentration. At low electric field intensity, amorphous nanoparticles are formed; whereas, at high electric field intensity, a layer of dense film is deposited (caused by the overgrowth of CeO 2 ). By using an optimum electrochemical condition, namely current density of 0.1 mA/cm 2 and Ce(Cl) 3 solution concentration of 0.5 mmol/L, moderate electric field intensity can be obtained to grow the CeO 2 nanorod–TiO 2 nanotube hybrid nanostructure.