Synthesis of nano-hollow-shaped rare earth oxides by glycothermal treatment of rare earth acetates and subsequent calcination

摘要

The reaction of yttrium acetate hydrate in 1,2-propanediol (1,2-PG) at 300 deg C yielded the products containing the acetate groups and the glycol moieties. The products decomposed into Y_2O_3 below 400 deg C, and the thus-obtained Y_2O_3 samples had quite large surface areas (>200 m~2/g) and were comprised of crystalline nano-hollow spheres with the outer diameter of 7-18 nm and the inner diameter of 2-8 nm. Dy_2O_3, Er_2O_3 and Yb_2O_3 composed of nano-hollow spheres were also obtained by the glycothermal treatment and subsequent calcination.