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Hydrolysis of Tetravalent Cerium for a Simple Route to Nanocrystalline Cerium Dioxide: An In Situ Spectroscopic Study of Nanocrystal Evolution
Author(s) -
IkedaOhno Atsushi,
Hennig Christoph,
Weiss Stephan,
Yaita Tsuyoshi,
Bernhard Gert
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201204101
Subject(s) - nanocrystal , nanocrystalline material , cerium , dynamic light scattering , x ray absorption spectroscopy , materials science , colloid , chemical engineering , hydrolysis , aqueous solution , absorption spectroscopy , nanotechnology , inorganic chemistry , nanoparticle , chemistry , organic chemistry , optics , physics , engineering
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‐CeO 2 ) 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‐CeO 2 are formed in an acidic aqueous solution simply through the hydrolysis of the initial precursor of small oligomer Ce IV species. This information on how NC‐CeO 2 evolves is fundamental to simplifying and alleviating the synthetic strategy for NC‐CeO 2 production.