Hydrolysis of Tetravalent Cerium for a Simple Route to Nanocrystalline Cerium Dioxide: An In Situ Spectroscopic Study of Nanocrystal Evolution

Authors

  • Dr. Atsushi Ikeda-Ohno,

    Corresponding author
    1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden (Germany), Fax: (+49) 351-260-3553
    2. School of Civil and Environmental Engineering, The University of New South Wales, UNSW, Sydney, NSW 2052 (Australia), Fax: (+61) 2-9385-5033
    3. Institute for Environmental Research, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232 (Australia), Fax: (+61) 2-9717-3111
    • Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden (Germany), Fax: (+49) 351-260-3553

    Search for more papers by this author
  • Dr. Christoph Hennig,

    1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden (Germany), Fax: (+49) 351-260-3553
    Search for more papers by this author
  • Stephan Weiss,

    1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden (Germany), Fax: (+49) 351-260-3553
    Search for more papers by this author
  • Dr. Tsuyoshi Yaita,

    1. Quantum Beam Science Directorate, Japan Atomic Energy Agency, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo-ken 679-5148 (Japan), Fax: (+81) 791-58-0311
    Search for more papers by this author
  • Prof. Dr. Gert Bernhard

    1. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden (Germany), Fax: (+49) 351-260-3553
    Search for more papers by this author

Abstract

Despite the rapid developments in recent nanocrystal research and their expanding applications, the evolution mechanism of nanocrystals remains veiled for the most part due to the lack of appropriate analytical techniques. Here we demonstrate one promising multi-spectroscopic approach for the in situ investigation of nanocrystal evolution. That is, the formation of nanocrystalline cerium dioxide (NC-CeO2) has been probed by dynamic light scattering (DLS), X-ray absorption spectroscopy (XAS) and high-energy X-ray scattering (HEXS). The obtained results indicate that the fine colloidal particles of NC-CeO2 are formed in an acidic aqueous solution simply through the hydrolysis of the initial precursor of small oligomer CeIV species. This information on how NC-CeO2 evolves is fundamental to simplifying and alleviating the synthetic strategy for NC-CeO2 production.

Ancillary