Influence of Aging and Environment on Nanoparticle Chemistry: Implication to Confinement Effects in Nanoceria

    Authors

    Svnt Kuchibhata; A. S. Karakoti; D. R. Baer; S. Samudrala; M. H. Engelhard; J. E. Amonette; S. Thevuthasan;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. C

    Keywords

    ULTRAVIOLET-ABSORPTION SPECTRA; OXIDE FUEL-CELLS; CEO2 NANOPARTICLES; HYDROGEN PEROXIDE; CERIA; CERIUM(IV); PARTICLES; OXIDATION; SYSTEM; ENERGY; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

    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.

    Journal Title

    Journal of Physical Chemistry C

    Volume

    116

    Issue/Number

    26

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    14108

    Last Page

    14114

    WOS Identifier

    WOS:000305933900034

    ISSN

    1932-7447

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