The production of rare earth oxide-based oxide materials as a notable group of advanced nanostructured materials with very good performance in various applications has been the focus of many scientists and researchers. Recent investigation has illustrated various applications of these advanced nanostructured materials, especially in the field of removal of toxic pollutants by sunlight. Of course, these advanced nanostructures have applications in other fields such as energy transformation, water splitting on redox reactions, and hydrogen photogeneration, as well as photocatalytic CO2 fixation. There are a variety of approaches for producing advanced rare earth oxide-based oxide nanostructures. This chapter discusses new advances in the production of these nanostructures. Besides, the substantial privileges and disadvantages of each approaches are discussed. Ultimately, the photocatalytic usages of advanced rare earth oxide-based oxide nanostructures are summarized.
