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

doi:10.1016/j.matlet.2009.11.004

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

Spherical nanocrystalline precursors of ceria (CeO₂) and CeO₂ 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 CeO₂ precursors were identified as orthorhombic Ce₂O(CO₃)₂·H₂O and hexagonal CeCO₃OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO₂ precursors were calcined at 400-700 °C to obtain CeO₂. The particle size distribution and morphology of the synthesized CeO₂ powders were unaffected by the calcination. The specific surface area of the CeO₂ powders was increased by the release of CO₂ and H₂O during the calcination. The calcination temperature is an important factor for the preparation of CeO₂ powder with a high surface area.

Original language	English
Pages (from-to)	323-326
Number of pages	4
Journal	Materials Letters
Volume	64
Issue number	3
DOIs	https://doi.org/10.1016/j.matlet.2009.11.004
Publication status	Published - 2010 Feb 15

All Science Journal Classification (ASJC) codes

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

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10.1016/j.matlet.2009.11.004

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title = "Control of particle size and shape of precursors for ceria using ammonium carbonate as a precipitant",

abstract = "Spherical nanocrystalline precursors of ceria (CeO2) and CeO2 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 CeO2 precursors were identified as orthorhombic Ce2O(CO3)2·H2O and hexagonal CeCO3OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO2 precursors were calcined at 400-700 °C to obtain CeO2. The particle size distribution and morphology of the synthesized CeO2 powders were unaffected by the calcination. The specific surface area of the CeO2 powders was increased by the release of CO2 and H2O during the calcination. The calcination temperature is an important factor for the preparation of CeO2 powder with a high surface area.",

author = "Cho, {Min Young} and Roh, {Kwang Chul} and Park, {Sun Min} and Choi, {Heon Jin} and Lee, {Jae Won}",

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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

Y1 - 2010/2/15

N2 - Spherical nanocrystalline precursors of ceria (CeO2) and CeO2 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 CeO2 precursors were identified as orthorhombic Ce2O(CO3)2·H2O and hexagonal CeCO3OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO2 precursors were calcined at 400-700 °C to obtain CeO2. The particle size distribution and morphology of the synthesized CeO2 powders were unaffected by the calcination. The specific surface area of the CeO2 powders was increased by the release of CO2 and H2O during the calcination. The calcination temperature is an important factor for the preparation of CeO2 powder with a high surface area.

AB - Spherical nanocrystalline precursors of ceria (CeO2) and CeO2 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 CeO2 precursors were identified as orthorhombic Ce2O(CO3)2·H2O and hexagonal CeCO3OH. The particle size and shape could be easily controlled by the CN concentration and the ratio of [AC]/[CN]. The CeO2 precursors were calcined at 400-700 °C to obtain CeO2. The particle size distribution and morphology of the synthesized CeO2 powders were unaffected by the calcination. The specific surface area of the CeO2 powders was increased by the release of CO2 and H2O during the calcination. The calcination temperature is an important factor for the preparation of CeO2 powder with a high surface area.

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DO - 10.1016/j.matlet.2009.11.004

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JO - Materials Letters

JF - Materials Letters

IS - 3

ER -

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

Abstract

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