Wang, Feng-Yun and Jung, Guo-Bin and Su, Ay and Chan, Shih-Hung and Li, Xiang-Ai and Duan, Meng and Chiang, Yu-Chun (2009) Synthesis of nano-ceria powder of high thermal stability. Materials Letters, 63 (11). 952 - 954.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
A new method is studied for preparing nano-ceria by acid leaching MgO from CeO2−MgO mixed powder made by calcining a gel. The MgO in the mixed powder can be leached completely with acetic acid solution at room temperature, but the CeO2 remains unaffected. The surface area (Sg) of the resulting CeO2 increases with Mg/Ce ratio, but approaches constant after the ratio is larger than a given value which is higher for the higher gel calcining temperature. When Mg/Ce is 8 (molar ratio) and the calcining temperature is 1253 K, the Sg of the resulting ceria remains 25.1 m2/g even after annealed at 1253 K for 4 h. In comparison with the conventional methods, CeO2 from the new method shows higher surface area and higher thermal stability.
|Uncontrolled Keywords:||Ceramics; Nanomaterials; Ceria preparation; New method; MgO|
|Subjects:||Material Science > Nanofabrication processes and tools|
|Deposited On:||10 Feb 2010 17:45|
|Last Modified:||10 Feb 2010 17:45|
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