Fabrication of cerium oxide nanoparticles: Characterization and optical properties

• Published in: Journal of colloid and interface science 2011-04, Vol.356 (2), p.473-480
• Main Authors: Goharshadi, Elaheh K., Samiee, Sara, Nancarrow, Paul
• Format: Article
• Language: English
• Subjects: absorption; Absorption spectroscopy; bioengineering; cations; Ceria nanoparticle; ceric oxide; Cerium oxide; Chemistry; colloidal properties; Colloidal state and disperse state; Diffusion; dispersions; energy; ethylene glycol; Exact sciences and technology; Fourier transform infrared spectroscopy; General and physical chemistry; Ionic liquid; Ionic liquids; light scattering; Microwave; Nanoparticles; nitrogen; Optical properties; Optical property; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Raman spectroscopy; rapid methods; Rare earth metals; Reflectance; reflectance spectroscopy; Spectroscopy; Surface physical chemistry; transmission electron microscopes; X-ray diffraction
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2011.01.063

A facile and environmentally friendly microwave irradiation method has been developed to prepare ceria nanoparticles with the average size 7 nm using a set of ionic liquids. [Display omitted] ► This is the first report on using this type of ionic liquids used in this work in ceria nanoparticle synthesis. ► The method is found to be convenient, rapid, cost-effective, and efficient. No surfactant was used. ► This is the first paper on determining the band gap of ceria nanoparticles using diffuse reflectance spectroscopy. 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.