Microstuctural Analysis and Optical Properties of Nanocrystalline Cerium Oxides Synthesized by Precipitation Method

Nanocrystalline cerium oxide is synthesized by precipitation method using a mixture of water solvent and isopropanol with a ratio of 1: 6 at room temperature has been successfully synthesized. Nanocrystalline cerium oxide was characterized by using X-Ray diffraction (XRD), DRS UV-Vis Analytic, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD results showed the peak intensity of Cerium Oxide (CeO2) was absorbed at an angle of 2Ɵ which is 28.7o, 33.2 o, 47.5 o, 56.7 o, 59.2 o, 69.5 o, 76.8 o, 79 , 1o, 88.3 o, and 95.5 o. The size of cerium oxide crystals was calculated using the debye schrerer equation and obtained a crystal size value of 11.04 - 99.19 nm. Based on the XRD data it can be concluded that the crystal size is included in the nanocrystal category with a size range of 1-100 nm. Microstructure results were analyzed by SEM and TEM showing rounded cerium oxide particles clumping like fine crystals. Optical properties of nanocrystalline cerium oxide were analyzed by DRS UV-Vis Analytic which showed that cerium oxide absorbs UV light at wavelengths of 200, 245 and 290 nm with an energy band gap value of 2.43 eV.
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