Abstract
Ultra dispersed ceria powders with crystallite size from 10 to 20 nm were synthesized by modified sol-gel and hydrothermal methods using cerium (III) nitrate as source of metal. N,N-dimethyloctylamine, monoethanolamine or tetraethylammonium hydroxide were used as a surfactant in syntheses. It was shown that increase of surfactant/Ce molar ratio value resulted in decreasing dispersion of obtained cerium oxides. It was shown that surfactant nature in the hydrothermal method had no significant effect on the dispersion of ceria obtained. Ceria had mesoporous structure with pore size less than 15 nm.
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