Solvothermal preparation and catalytic performance of nanometer Ce_(0.8)Zr_(0.2)O_2 solid solution

Nanometer Ce_(0.8)Zr_(0.2)O_2 solid solution was prepared by solvothermal method,using cerous nitrate and zirconium nitrate as raw materials at 120℃ for 24h in formic acid.The product was characterized by X-ray powder diffraction(XRD),Raman scattering spectrum,scanning electron microscope(SEM) and transmission microscopy(TEM).Furthermore,its catalytic activity was measured in the synthesis of n-butyl acetate by the reaction of acetic acid and n-butyl alcohol.The XRD pattern and Raman scattering spectrum show that the sample has formed homogeneous solid solution with CeO_2 cubic structure.The TEM observation indicates that the as-synthesized Ce_(0.8)Zr_(0.2)O_2 solid solution has the particle diameter less than 100nm.In the esterification reaction,Ce_(0.8)Zr_(0.2)O_2 solid solution possesses high catalytic activity and can be easily separated from reaction liquid.After it is reused ten times,its activity basically keep unchanging.