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CeO2 Nanorod–TiO2 Nanotube Hybrid Nanostructure

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CeO2 nanorods with a polycrystalline structure were prepared by galvanostatic electrodeposition using TiO2 nanotube arrays as templates. The heterogeneous nucleation and subsequent growth of CeO2 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 CeO2). By using an optimum electrochemical condition, namely current density of 0.1 mA/cm2 and Ce(Cl)3 solution concentration of 0.5 mmol/L, moderate electric field intensity can be obtained to grow the CeO2 nanorod–TiO2 nanotube hybrid nanostructure.
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Document Type: Research Article

Affiliations: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Publication date: 2010-09-01

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