CERIUM OXIDE, METHOD FOR PREPARING SAME, AND DEVICE FOR EXTRACTING METAL IN METAL OXIDE

The present invention relates to a cerium oxide and a method for preparing same. Specifically, a cerium oxide is provided, wherein the cerium oxide is in the form of cerium oxide (CeO2) doped with a rare earth metal, the mole ratio between the rare earth metal and cerium oxide (CeO2) being 0.05 to 0.4.