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White nanoparticles of calcia-doped ceria were prepared from the precipitate by reacting CeCl3-CaCl2mixed solution with NaOH solution at pH 12 and the oxidation with hydrogen peroxide solution at 40∘C, followed by the calcination at 700∘C for 1 h. The sample before calcination contained significant amount of OH− in the lattice and was yellow, but the powders calcined above 700∘C were white, indicating...
Nanoparticles of calcia-doped ceria were prepared by adding CeCl 3 -CaCl 2 mixed solution and NaOH solution simultaneously in distilled water followed by oxidation with hydrogen peroxide solution at 40 o C and pH 12. After that, amorphous silica was coated by dispersing them in Na 2 SiO 3 aqueous solution at pH 10, followed by decreasing the solution pH to 5...
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