Microwave-assisted synthesis of ceria nanoparticles
Microwave-assisted synthesis of ceria nanoparticles
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DOI：
10.1016/j.materresbull.2005.05.014
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发表时间：
2005-10
影响因子：
5.4
通讯作者：
Huaming Yang;Chenghuan Huang;A. Tang;Xiang-chao Zhang;Wuguo Yang
中科院分区：
文献类型：
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作者：
Huaming Yang;Chenghuan Huang;A. Tang;Xiang-chao Zhang;Wuguo Yang
以硝酸铈铵和氢氧化钠为原料，采用微波辅助加热技术成功制备了纳米CeO2。在500°C下对所制备的粉末进行进一步的热处理，形成了结晶良好的CeO2纳米颗粒，其平均晶粒尺寸约为8nm，随加热温度的变化而变化。用X射线衍射（XRD）和透射电子显微镜（TEM）对所制备的粉体和CeO2纳米颗粒进行了表征。结果表明，合成粉末的形貌从制备样品的棒状到热处理后的球形。初步探讨了CeO2纳米微晶在退火过程中的生长机理。
Nanocrystalline ceria (CeO2) particles have been successfully prepared by microwave-assisted heating technique from an aqueous solution containing ammonium Ce(IV) nitrate and sodium hydroxide. Further thermal treatment of the as-prepared powder at 500°C resulted in the formation of the well-crystallized CeO2nanoparticles with an average crystal size of about 8nm, varying with the heating temperature. The as-prepared powder and the CeO2nanoparticles were examined using X-ray diffraction (XRD) and transmission electron microscope (TEM) techniques. It was found that the morphologies of the synthesized powder show from rod-like for the as-prepared sample to sphere-like for the heat-treated nanoparticles. Mechanism of CeO2nanocrystallite growth during annealing is primarily investigated.