Room Temperature Synthesis of Nano Crystalline Cerium Oxide Using Hydrazine and Ammonia

The synthesis of nano crystalline particles of cerium oxide at room temperature was investigated in detail. Highly crystallized cerium oxide nano powder with a particle size of 10 nm was obtained by adding a hydrazine aqueous solution or an ammonia aqueous solution into a cerium nitrate solution followed by stirring the mixed solutions over a prolonged period at room temperature. It was considered that the good crystallinity was attributable to the use of an aqueous solution containing Ce(III) ions as a starting solution.