Morphological evolution for CeO2 nanoparticles synthesized by precipitation technique

Hung Yi Chang, Huey-Ing Chen

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

In this article, the morphological evolutions of crystalline CeO 2 nanoparticles prepared by isothermal and 2-stage non-isothermal precipitations are presented. Also, this paper demonstrates a simple way to obtain differently shaped CeO2 nanoparticles by adjusting the reaction temperature course. The morphology and structure of the resulting products are characterized by TEM, HRTEM, ED and XRD techniques. Furthermore, the particle formation mechanisms under different reaction conditions are also investigated. The experimental results show that the initial Ce(OH)3 precipitate plays an important role on determining the morphology and structure of the final products. At the earlier stage of precipitation, the Ce(OH) 3 precipitates are sphere-like at 0 °C, but are needle-like at 90 °C. By either isothermal or non-isothermal precipitations over the studied conditions, most of the final products with size of 6.9-23.3 nm are particulate, e.g., sphere-like or hexagonal. However, needle-like CeO2 particles can only be achieved by the proposed 2-stage non-isothermal precipitation via topotactic mechanism.

Original languageEnglish
Pages (from-to)457-468
Number of pages12
JournalJournal of Crystal Growth
Volume283
Issue number3-4
DOIs
Publication statusPublished - 2005 Oct 1

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Needles
Precipitates
Nanoparticles
nanoparticles
needles
precipitates
products
Crystalline materials
Transmission electron microscopy
particulates
adjusting
Temperature
transmission electron microscopy
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Chang, Hung Yi ; Chen, Huey-Ing. / Morphological evolution for CeO2 nanoparticles synthesized by precipitation technique. In: Journal of Crystal Growth. 2005 ; Vol. 283, No. 3-4. pp. 457-468.
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Morphological evolution for CeO2 nanoparticles synthesized by precipitation technique. / Chang, Hung Yi; Chen, Huey-Ing.

In: Journal of Crystal Growth, Vol. 283, No. 3-4, 01.10.2005, p. 457-468.

Research output: Contribution to journalArticle

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AB - In this article, the morphological evolutions of crystalline CeO 2 nanoparticles prepared by isothermal and 2-stage non-isothermal precipitations are presented. Also, this paper demonstrates a simple way to obtain differently shaped CeO2 nanoparticles by adjusting the reaction temperature course. The morphology and structure of the resulting products are characterized by TEM, HRTEM, ED and XRD techniques. Furthermore, the particle formation mechanisms under different reaction conditions are also investigated. The experimental results show that the initial Ce(OH)3 precipitate plays an important role on determining the morphology and structure of the final products. At the earlier stage of precipitation, the Ce(OH) 3 precipitates are sphere-like at 0 °C, but are needle-like at 90 °C. By either isothermal or non-isothermal precipitations over the studied conditions, most of the final products with size of 6.9-23.3 nm are particulate, e.g., sphere-like or hexagonal. However, needle-like CeO2 particles can only be achieved by the proposed 2-stage non-isothermal precipitation via topotactic mechanism.

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