Influence of aging and environment on nanoparticle chemistry: Implication to confinement effects in nanoceria

Satyanarayana V.N.T. Kuchibhatla, A. S. Karakoti, D. R. Baer, S. Samudrala, M. H. Engelhard, J. E. Amonette, S. Thevuthasan, S. Seal

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    Abstract

    The oxidation state switching of cerium in cerium oxide nanoparticles is studied in detail. The influence of synthesis medium, aging time, and local environment on the oxidation state switching, between +3 and +4, is analyzed by tracking the absorption edge using UV-visible spectroscopy. It is observed that by tuning the local environment, the chemistry of the nanoparticles could be altered. These time-dependent, environmentally induced changes likely contribute to inconsistencies in the literature regarding quantum-confinement effects for ceria nanoparticles. The results in this Article indicate that there is a need to carry out comprehensive analysis of nanoparticles while considering the influence of synthesis and processing conditions, aging time and local environment.

    Original languageEnglish
    Pages (from-to)14108-14114
    Number of pages7
    JournalJournal of Physical Chemistry C
    Volume116
    Issue number26
    DOIs
    Publication statusPublished - 5 Jul 2012

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    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films

    Cite this

    Kuchibhatla, S. V. N. T., Karakoti, A. S., Baer, D. R., Samudrala, S., Engelhard, M. H., Amonette, J. E., Thevuthasan, S., & Seal, S. (2012). Influence of aging and environment on nanoparticle chemistry: Implication to confinement effects in nanoceria. Journal of Physical Chemistry C, 116(26), 14108-14114. https://doi.org/10.1021/jp300725s