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

Putri, G. E. and Arief, Syukri and Jamarun, Novesar and Gusti, F. R and Zainul, Rahadian (2019) Microstructural Analysis and Optical Properties of Nanocrystalline Cerium Oxides Synthesized by Precipitation Method. Rasayan J. Chem, 12 (1). pp. 85-90. ISSN ISSN: 0974-1496 | e-ISSN: 0976-0083

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Abstract

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 XRD, DRS UV-Vis Analytic, SEM and TEM. XRD results showed the peak intensity of Cerium Oxide (CeO2) was absorbed in an angle of 2Ɵ which is 28.7o , 33.2o , 47.5o , 56.7o , 59.2o , 69.5o , 76.8o , 79.1o , 88.3o , and 95.5o . The size of cerium oxide crystals was calculated using the Debye Scherrer 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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