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Synthesis of CeO2-Based Quantum Dots through a Polyol-Hydrolysis Method for Fuel-Borne Catalysts

Authors

  • Ying Xin,

    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
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  • Xi Yang,

    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
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  • Pin Jiang,

    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
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  • Prof. Zhaoliang Zhang,

    Corresponding author
    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
    • Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
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  • Prof. Zhongpeng Wang,

    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
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  • Prof. Yihe Zhang

    Corresponding author
    1. Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
    2. National Laboratory of Mineral Materials, China University of Geosciences (Beijing), 29 Xueyuan Road, Beijing 100083 (China)
    • Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Road, Jinan 250022 (China), Fax: (+86) 531-8973-6032
    Search for more papers by this author

Abstract

The transparent colloidal solutions of monodisperse CeO2-based quantum dots (QDs) were prepared by heating a triethylene glycol (TEG) solution of Ce(NO3)3⋅6 H2O (and Fe(NO3)3⋅9 H2O) at 180 °C. The CeO2-based QDs were characterized by X-ray powder diffraction (XRD), dynamic light scattering (DLS), transmission electron microscopy (TEM), UV/vis absorption spectra and Brunauer–Emmett–Teller (BET) surface area. CeO2-based QDs with uniform particle size below 5 nm exhibit narrow size distribution, quantum effect, good re-dispersion ability and high surface area. For the formation of these QDs, a polyol-hydrolysis mechanism is proposed. CeO2 QDs are applied in fuel borne catalysts (FBCs) for diesel soot combustion, which exhibit excellent activity at a rather low temperature, owing to the homogeneous and large number of contact points between the catalyst and the soot. The doping with Fe can further improve the selectivity to CO2.

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