Cerorium Oxide Research Paper

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As one of the most reactive rare earth materials, Cerium Oxide (CeO2) has been attracting great interest because of its unique applications in solid state electrolytes for electrochemical devices, 1, 2 three way catalysts, 3, 4 hybrid solar cells, 5 and luminescent materials for violet/blue fluorescence. 6 Owing to its large specific surface area and greater reactivity, Nano-CeO2 are of particular interest in nanotoxicological studies and projected use in medical applications, cosmetic products and by products from automotive fuel additives. 7 Recently, Oberdorster and Hoshino et al., 8, 9 reported that nanoparticles can be potentially harmful due to their unique physicochemical properties and high specific surface area. However, in contrast…show more content…
The samples were prepared by using (NH4)2Ce(NO3)6 as a cerium source and 10 ml of ethanol as solvent. In a typical synthesis, 0.20 g of ammonium cerium nitrate was dissolved in a 10 ml of ethanol and allowed to stir for complete dissolution of the compound. Then 0.075 mol of ammonia water was added dropwise to the precursor solution. This process was continuous to stir until to reach the colour of pale yellow for 6 h. The obtained pale yellow precipitation was separated by centrifugation, washed with deionized water and ethanol for several times, and dried at 80 °C for 6…show more content…
Nanoparticle images and selected area electron diffraction (SAED) were recorded by using the transmission electron microscopy (TEM) (TECHNAI-20-G2) by drop-casting the well-sonicated solution of a few milligrams of nanoparticles dispersed in 5 ml of ethanol on carbon-coated TEM grids. The hydrodynamic size and surface charge of nanoparticle dispersions were measured using a Zetasizer (Malvern ZS-90) utilizing dynamic light scattering (DLS). DLS is the most intense and frequently used technique for hydrodynamic size distribution measurement and they were performed after thorough sonication of the nanoparticles dispersed in different dispersants. Approximately 2 mg of nanoparticles were dispersed in 10 ml of the dispersant, i.e. water, ethanol, and toluene, for a typical run. The number of runs was taken to account the complete dispersion of nanoparticles in different dispersant was in the range

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