Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Iran.
J Colloid Interface Sci. 2011 Apr 15;356(2):473-80. doi: 10.1016/j.jcis.2011.01.063. Epub 2011 Jan 25.
Ceria (CeO(2)) is a technologically important rare earth material because of its unique properties and various engineering and biological applications. A facile and rapid method has been developed to prepare ceria nanoparticles using microwave with the average size 7 nm in the presence of a set of ionic liquids based on the bis (trifluoromethylsulfonyl) imide anion and different cations of 1-alkyl-3-methyl-imidazolium. The structural features and optical properties of the nanoparticles were determined in depth with X-ray powder diffraction, transmission electron microscope, N(2) adsorption-desorption technique, dynamic light scattering (DLS) analysis, FTIR spectroscopy, Raman spectroscopy, UV-vis absorption spectroscopy, and Diffuse reflectance spectroscopy. The energy band gap measurements of nanoparticles of ceria have been carried out by UV-visible absorption spectroscopy and diffuse reflectance spectroscopy. The surface charge properties of colloidal ceria dispersions in ethylene glycol have been also studied. To the best of our knowledge, this is the first report on using this type of ionic liquids in ceria nanoparticle synthesis.
氧化铈（CeO2）是一种具有独特性能的重要稀土材料，在工程和生物等领域有着广泛的应用。本文采用微波辅助法，以一系列基于双（三氟甲基磺酰）亚胺阴离子和不同 1-烷基-3-甲基咪唑阳离子的离子液体为模板剂，快速简便地制备了平均粒径为 7nm 的氧化铈纳米粒子。通过 X 射线粉末衍射、透射电子显微镜、N2 吸附-脱附、动态光散射（DLS）分析、傅立叶变换红外光谱（FTIR）、拉曼光谱、紫外-可见漫反射吸收光谱和漫反射光谱等对纳米粒子的结构特征和光学性质进行了深入研究。采用紫外-可见吸收光谱和漫反射光谱对氧化铈纳米粒子的能带隙进行了测量。还研究了胶体氧化铈在乙二醇中的分散体的表面电荷特性。据我们所知，这是首次报道在氧化铈纳米粒子合成中使用这种类型的离子液体。
