关键词: 表面活性剂;水热法;纳米晶体;晶体生长活化能;La2Ce2O7

Abstract: La2Ce2O7 nanocrystallines were prepared by hydrothermal method with La2O3 and Ce(NO3)3·6H2O as precursors, SDBS and CTAB as surfactants.The physicochemical performance of the products were investigated by XRD, Raman, SEM and TEM.The influence of different surfactants on the activation energy of crystal growth was also discussed.Qualitative analyses indicate that the sample with CTAB as surfactant shows cubic fluorite structure, the specific surface area and the average crystallite size are 187.53 m2 g-1 and 11.4 nm, respectively.In addition, the activation energy of crystal growth of CTAB (16.33±0.02 kJ·mol-1) is higher than that of SDBS (13.47±0.03 kJ·mol-1).

Key words: La2Ce2O7 nanocrystallines were prepared by hydrothermal method with La2O3 and Ce(NO3)3·6H2O as precursors, SDBS and CTAB as surfactants.The physicochemical performance of the products were investigated by XRD, Raman, SEM and TEM.The influence of different surfactants on the activation energy of crystal growth was also discussed.Qualitative analyses indicate that the sample with CTAB as surfactant shows cubic fluorite structure, the specific surface area and the average crystallite size are 187.53 m2 g-1 and 11.4 nm, respectively.In addition, the activation energy of crystal growth of CTAB (16.33±0.02 kJ·mol-1) is higher than that of SDBS (13.47±0.03 kJ·mol-1).