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利用硝酸铈为原料,分别以碳酸氢铵和氢氧化钠为沉淀剂,采用超声雾化法制备了CeO2纳米颗粒。在室温将反应液体在超声雾化器中雾化成微滴,然后把微滴作为微反应器,使粒子在体积有限的微液滴内成核、晶化、长大。利用 X射线衍射仪、Fourier红外变换仪、透射电镜对所制得样品的物相、结构和形貌进行了表征。结果表明:利用超声雾化法制备CeO2纳米粒子的颗粒均匀且分散性较好;以氢氧化钠为沉淀剂较以碳酸氢铵为沉淀剂制备的CeO2颗粒更均匀,粒径更小,约为3nm。
Abstract：Cerium dioxide (CeO2) nanoparticles were prepared by a novel and simple ultrasonic automization process using low-cost cerous nitrate (Ce(NO3)3·6H2O), ammonium acid carbonate (NH4HCO3) and sodium hydroxide (NaOH) as starting materials. Mist drops of solutions were generated and used as space-confined microreactors for the nucleation, growth and crystallization of CeO2 nanoparticles under room temperature conditions. The techniques of X-ray powder diffraction, Fourier transform infrared spectros-copy and transmission electron microscopy were used to characterize the obtained samples. The results show that CeO2 nanoparticles with small particle size and narrow size distributions can be prepared by the ultrasonic automization process. The sizes of CeO2 parti-cles prepared using NaOH as precipitant are smaller (about 3 nm) and more uniform than those prepared using NH4HCO3.
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基本信息:
中图分类号:TB383.1
引用信息:
[1]陈志刚,刘强,赵晓兵,等.沉淀剂对超声雾化法制备CeO_2纳米颗粒的影响(英文)[J].硅酸盐学报,2008,No.234(10):1450-1453.
基金信息:
国家自然科学基金(20771047)资助项目。
2008-10-15
2008-10-15