Lee, Jin-Seok and Choi, Sung-Churl (2004) Crystallization behavior of nano-ceria powders by hydrothermal synthesis using a mixture of H2O2 and NH4OH. Materials Letters, 58 (3-4). 390 - 393.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
Homogeneous and well-crystallized nano-ceria (CeO2) powders were produced by hydrothermal synthesis using a mixture of H2O2 as the oxidizer and NH4OH as the mineralizer. The precipitates were prepared by mixture ligands of ---OH and ---OOH derived from NH4OH and H2O2. The hydrothermal synthesis was conducted at 200 °C for 6 h. The synthesized ceria powders were characterized as the crystalline phase identification by X-ray diffractometry, the chemical bonding by infrared spectrophotometer (FT-IR) and the morphology and particle size by transmission electron microscopy (TEM). Crystallization behavior of ceria powders using a mixture of oxidizer and mineralizer was more influenced by ---OOH ligands than by ---OH ligands to form Ce(OH)x(OOH)4−x as precursor with increasing concentrations of H2O2 with 10–20 times of the cerium(III) ion. In all samples, synthesized particle size was decreased with increasing concentration of oxidizer ranging from 6 to 12 nm in diameter. Morphology and size distribution of synthesized particles were relatively spherical and uniform, respectively.
|Uncontrolled Keywords:||Ceramics; Powder technology; CeO2; Hydrothermal; Hydrogen peroxide|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
|Deposited On:||20 Aug 2009 12:01|
|Last Modified:||20 Aug 2009 12:01|
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