Metal oxide solid solution, preparation and use thereof

Abstract

Disclosed is a method for preparing a metal oxide solid solution in nano size. The metal oxide solid solution is prepared by reacting a reactant mixture containing water and at least two water-soluble metal compounds at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the metal compounds at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 1,000 nm. The metal oxide solid solution is, in particular suitable as a UV light shielding agent or as an oxygen storage component.

1 - 29 . (canceled) 
     
     
         30 . A metal oxide solid solution prepared by reacting a reactant mixture comprising i) water, ii) a water-soluble cerium compound, and iii) a water-soluble metal compound selected from the group consisting of zinc compounds, yttrium compounds, scandium compounds, compounds of lanthanides except for cerium, alkaline earth metal compounds and combinations thereof, at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the metal compounds at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 100 nm. 
     
     
         31 . A metal oxide solid solution prepared by the reacting a reactant mixture comprising i) water, ii) a water-soluble cerium compound, and iii) a water-soluble zirconium compound at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the cerium compound and zirconium compound at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 10 nm and a specific surface area of at least 100 m2/g. 
     
     
         33 . The metal oxide solid solution as forth in claim  2 , wherein the reactant mixture further comprises iv) at least one water-soluble metal compound selected from the group consisting of scandium compounds, yttrium compounds, and compounds of lanthanide metals except for cerium. 
     
     
         34 . An oxygen storage component comprising the metal oxide solid solution according to  claim 31 . 
     
     
         34 . An UV shielding agent comprising the metal oxide solid solution according to  claim 30 .