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Issue 39, 2011
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Hydrothermal synthesis and automotive exhaust catalytic performance of CeO2 nanotube arrays

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Abstract

Ceria (CeO2) nanotube arrays with precisely defined size and density were directly synthesized on glass and cordierite substrates using a ZnO nanorods-assisted hydrothermal method. Eliminating the procedures of template removal and film coating, the one-step synthesis approach could greatly broaden the applications for materials with tubular structures. The proper concentration of cerium nitrate precursor solution acts a vital role to adjust the instantaneous precipitation of CeO2 and dissolution of ZnO templates. The as-prepared CeO2 tube arrays were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) techniques, which reveal a regular tubular structure with the average diameter of 500 nm and length of 3 μm. The automotive exhaust catalytic performance of CeO2 tube arrays prepared on the cordierite was evaluated. Compared with the ceria nanoparticles film, the target CeO2 tubes exhibit improved catalytic activities at a low start-up temperature for oxycarbide and hydrocarbon. Furthermore, the palladium-decorated CeO2 tubes exhibit a higher catalytic activity for the degradation of oxynitride than that of palladium/ceria particles/cordierite.

Graphical abstract: Hydrothermal synthesis and automotive exhaust catalytic performance of CeO2 nanotube arrays

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Publication details

The article was received on 15 Jun 2011, accepted on 27 Jul 2011 and first published on 06 Sep 2011


Article type: Paper
DOI: 10.1039/C1JM12747K
Citation: J. Mater. Chem., 2011,21, 15442-15448
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    Hydrothermal synthesis and automotive exhaust catalytic performance of CeO2 nanotube arrays

    Y. Feng, L. Liu and X. Wang, J. Mater. Chem., 2011, 21, 15442
    DOI: 10.1039/C1JM12747K

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