Formation of irregular nanocrystalline CeO 2 particles from acetate-based precursor via spray pyrolysis

Chin Yi Chen; Teng Kuan Tseng; Chien Yie Tsay; Chung Kwei Lin

doi:10.1007/s11665-007-9164-6

Formation of irregular nanocrystalline CeO ₂ particles from acetate-based precursor via spray pyrolysis

Chin Yi Chen, Teng Kuan Tseng, Chien Yie Tsay, Chung Kwei Lin

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

14 Citations (Scopus)

Abstract

Ultrasonic spray pyrolysis of acetate-based salt precursor with various concentrations is employed to produce nanocrystalline CeO ₂ particles in this study. The mean particle size of as-pyrolyzed CeO ₂ powders produced from precursor concentrations of 1.0, 0.1, and 0.01 wt.% are 350, 185, and 95 nm, respectively. We found that due to the low solubility of the precursor, the formation of a shell occurs during pyrolysis, leading the CeO ₂ particles to be bowl-like in shape with uneven surfaces. Precursor concentrations significantly determine the size of the product particles. The bimodal size distribution of the product particles suggests that both one-particle-per-drop and gas-to-particle conversion mechanisms are active in the process.

Original language	English
Pages (from-to)	20-24
Number of pages	5
Journal	Journal of Materials Engineering and Performance
Volume	17
Issue number	1
DOIs	https://doi.org/10.1007/s11665-007-9164-6
Publication status	Published - Feb 2008
Externally published	Yes

Keywords

CeO
Precursor
Solubility
Spray pyrolysis

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1007/s11665-007-9164-6

Cite this

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title = "Formation of irregular nanocrystalline CeO 2 particles from acetate-based precursor via spray pyrolysis",

abstract = "Ultrasonic spray pyrolysis of acetate-based salt precursor with various concentrations is employed to produce nanocrystalline CeO 2 particles in this study. The mean particle size of as-pyrolyzed CeO 2 powders produced from precursor concentrations of 1.0, 0.1, and 0.01 wt.% are 350, 185, and 95 nm, respectively. We found that due to the low solubility of the precursor, the formation of a shell occurs during pyrolysis, leading the CeO 2 particles to be bowl-like in shape with uneven surfaces. Precursor concentrations significantly determine the size of the product particles. The bimodal size distribution of the product particles suggests that both one-particle-per-drop and gas-to-particle conversion mechanisms are active in the process.",

keywords = "CeO, Precursor, Solubility, Spray pyrolysis",

author = "Chen, {Chin Yi} and Tseng, {Teng Kuan} and Tsay, {Chien Yie} and Lin, {Chung Kwei}",

note = "Funding Information: This research was partially sponsored by the National Science Council, the Republic of China, under the Grant No. NSC93-2216-E-035-026.",

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AU - Chen, Chin Yi

AU - Tseng, Teng Kuan

AU - Tsay, Chien Yie

AU - Lin, Chung Kwei

N1 - Funding Information: This research was partially sponsored by the National Science Council, the Republic of China, under the Grant No. NSC93-2216-E-035-026.

PY - 2008/2

Y1 - 2008/2

N2 - Ultrasonic spray pyrolysis of acetate-based salt precursor with various concentrations is employed to produce nanocrystalline CeO 2 particles in this study. The mean particle size of as-pyrolyzed CeO 2 powders produced from precursor concentrations of 1.0, 0.1, and 0.01 wt.% are 350, 185, and 95 nm, respectively. We found that due to the low solubility of the precursor, the formation of a shell occurs during pyrolysis, leading the CeO 2 particles to be bowl-like in shape with uneven surfaces. Precursor concentrations significantly determine the size of the product particles. The bimodal size distribution of the product particles suggests that both one-particle-per-drop and gas-to-particle conversion mechanisms are active in the process.

AB - Ultrasonic spray pyrolysis of acetate-based salt precursor with various concentrations is employed to produce nanocrystalline CeO 2 particles in this study. The mean particle size of as-pyrolyzed CeO 2 powders produced from precursor concentrations of 1.0, 0.1, and 0.01 wt.% are 350, 185, and 95 nm, respectively. We found that due to the low solubility of the precursor, the formation of a shell occurs during pyrolysis, leading the CeO 2 particles to be bowl-like in shape with uneven surfaces. Precursor concentrations significantly determine the size of the product particles. The bimodal size distribution of the product particles suggests that both one-particle-per-drop and gas-to-particle conversion mechanisms are active in the process.

KW - CeO

KW - Precursor

KW - Solubility

KW - Spray pyrolysis

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