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Among the lanthanide oxides, cerium oxide has superior physicochemical characteristics. The incorporating trivalent dopant proposed to modify the physicochemical characteristics of cerium oxide. This ...study aims to investigate the formation of bismuth-doped cerium oxide nanopowder through the precipitation method calcined at 200℃. The formation and thermal stability of bismuth-doped cerium oxide were confirmed by X-ray diffraction pattern, scanning electron image, and thermogravimetric curve. The ultraviolet absorption properties were analyzed by UV-Vis diffuse reflectance spectroscopy. The analysis of the X-ray diffraction pattern declared the cubic fluorite cerium oxide formation with crystallite sizes of 7 nm. The bismuth-doped cerium oxide is composed of spherical shape particles. Thermogravimetric curves revealed a high thermal stability of bismuth-doped cerium oxide at a temperature above 500℃, as evidenced by the total decrease in mass percentage of 7.76 wt% that corresponds to the evaporation of adsorbed water and hydroxyl molecules. Incorporating bismuth dopant led to broad ultraviolet absorption of cerium oxide at wavelengths between 200 and 400 nm. The result demonstrates the crystalline bismuth- doped cerium oxide possessed high thermal stability and excellent ultraviolet absorption properties.続きを見る
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Mendeley出力
p2186-2192