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Hydrothermal Synthesis of Monodisperse Ce 0.5 Zr 0.5 O 2 Metastable Solid Solution Nanocrystals
Author(s) -
Taniguchi Takaaki,
Watanabe Tomoaki,
Matsushita Nobuhiro,
Yoshimura Masahiro
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200801203
Subject(s) - dispersity , nanocrystal , chemistry , tetragonal crystal system , hydrothermal circulation , aqueous solution , metastability , solid solution , chemical engineering , hydrothermal synthesis , phase (matter) , thermal stability , nanotechnology , materials science , organic chemistry , engineering
An environmentally friendly and economically efficient method has been developed to synthesize monodisperse CeO 2 ‐ZrO 2 solid solution nanocrystals. In this process, the formation of oleate‐stabilized Ce 0.5 Zr 0.5 O 2 nanocrystals was designed to proceed through hydrolytic sol–gel condensation of metal–oleate precursors in an aqueous solution and subsequent hydrothermal growth at 200 °C for 6 h. The results showed that the 3.0‐nm‐sized nanocrystals possess a metastable CeO 2 ‐ZrO 2 tetragonal phase with well‐designed chemical composition and are nearly monodisperse. Owing to the uniform textural and elemental properties, the products exhibit relatively high thermal stability of the metastable phase and well‐defined reduction properties.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)