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Synthesis of Bundle- and Flake-Like CeO2 Powders Via a Precursor-Pyrolysis Approach

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Micrometer-sized CeO2 powders with bundle- and flake-like morphologies have been successfully synthesized by a precursor-pyrolysis approach, in which the precursors are first synthesized by a hydrothermal method and CeO2 powders are finally obtained through a pyrolysis process. Results reveal that the stoichiometric concentration of cerium ion plays an important role in the formation of the final products with different morphologies. The CeO2 powders obtained by pyrolyzing the precursors prepared from the solutions with high concentration (0.05M) and low concentration (0.0125M) exhibit bundle- and flake-like morphology, respectively. The possible growth process is proposed by preparing a series of intermediate morphologies during the shape evolution of bundle-like CeO2 based on the scanning electron microscopy image observation.
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Document Type: Research Article

Affiliations: College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Publication date: April 1, 2007

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