Control of particle size and shape of precursors for ceria using ammonium carbonate as a precipitant

Min Young Cho, Kwang Chul Roh, Sun Min Park, Heon-Jin Choi, Jae Won Lee

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Spherical nanocrystalline precursors of ceria (CeO 2 ) and CeO 2 powder with different size distributions were prepared by a reflux method using cerium nitrate hexahydrate (CN) as the cerium source and ammonium carbonate (AC) as the precipitant. The crystalline phases of the synthesized CeO 2 precursors were identified as orthorhombic Ce 2 O(CO 3 ) 2 ·H 2 O and hexagonal CeCO 3 OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO 2 precursors were calcined at 400-700 °C to obtain CeO 2 . The particle size distribution and morphology of the synthesized CeO 2 powders were unaffected by the calcination. The specific surface area of the CeO 2 powders was increased by the release of CO 2 and H 2 O during the calcination. The calcination temperature is an important factor for the preparation of CeO 2 powder with a high surface area.

Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalMaterials Letters
Volume64
Issue number3
DOIs
Publication statusPublished - 2010 Feb 15

Fingerprint

Cerium compounds
Cerium
cerium
Powders
Carbonates
carbonates
Particle size
Calcination
roasting
nitrates
Nitrates
Carbon Monoxide
particle size distribution
Specific surface area
Particle size analysis
Crystalline materials
preparation
ammonium carbonate
cerium nitrate
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Cho, Min Young ; Roh, Kwang Chul ; Park, Sun Min ; Choi, Heon-Jin ; Lee, Jae Won. / Control of particle size and shape of precursors for ceria using ammonium carbonate as a precipitant. In: Materials Letters. 2010 ; Vol. 64, No. 3. pp. 323-326.
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Control of particle size and shape of precursors for ceria using ammonium carbonate as a precipitant. / Cho, Min Young; Roh, Kwang Chul; Park, Sun Min; Choi, Heon-Jin; Lee, Jae Won.

In: Materials Letters, Vol. 64, No. 3, 15.02.2010, p. 323-326.

Research output: Contribution to journalArticle

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T1 - Control of particle size and shape of precursors for ceria using ammonium carbonate as a precipitant

AU - Cho, Min Young

AU - Roh, Kwang Chul

AU - Park, Sun Min

AU - Choi, Heon-Jin

AU - Lee, Jae Won

PY - 2010/2/15

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AB - Spherical nanocrystalline precursors of ceria (CeO 2 ) and CeO 2 powder with different size distributions were prepared by a reflux method using cerium nitrate hexahydrate (CN) as the cerium source and ammonium carbonate (AC) as the precipitant. The crystalline phases of the synthesized CeO 2 precursors were identified as orthorhombic Ce 2 O(CO 3 ) 2 ·H 2 O and hexagonal CeCO 3 OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO 2 precursors were calcined at 400-700 °C to obtain CeO 2 . The particle size distribution and morphology of the synthesized CeO 2 powders were unaffected by the calcination. The specific surface area of the CeO 2 powders was increased by the release of CO 2 and H 2 O during the calcination. The calcination temperature is an important factor for the preparation of CeO 2 powder with a high surface area.

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