Synthesis and Characterization of Nanometer Ce0.75Zr0.25O2 Powders by Solid-State Chemical Reaction Method.

The nanostructure Ce0.75Zr0.25O2 powders have been successfully synthesized by using the mechanically activated solid-state chemical reaction method for the first time, with Ce2(CO)3, ZrOCl2·8H2O, and H2C2O4·2H2O as raw materials. The structure andmorphology of Ce0.75Zr0.25O2 powders were characterized to be in the single cubic phase and spherical shape via X-ray powder diffraction, transmission electron microscopy, X-ray Photoelectron Spectrometer, and BET surface area testing technique. The average size of particles wasmeasured to be less than 20 nm, and the specific surface area was 85.4m²/g. The TG-DTA investigation was used to reveal the possibly chemical reaction mechanism during the synthesis process. The activity of Ce0.75Zr0.25O2 oxide solution in three-way catalysts was also valued in this work. [ABSTRACT FROM AUTHOR]