【摘要】 采用溶胶凝胶法制备了纳米Ti1-xCexO2系列样品。利用X射线衍射(XRD)、透射电子显微镜(TEM)、高分辨电子显微镜(HRTEM)对纳米Ti1-xCexO2系列样品颗粒尺寸、形貌以及固溶区范围和物相组成进行了研究;同时,采用Rietveld结构精修的方法研究了Ce的不同掺杂量对TiO2晶体结构的影响。实验结果表明,Ce掺杂TiO2能够形成Ti1-xCexO2固溶体,Ti1-xCexO2的固溶区范围在x=0~0.06之间,Ti1-xCexO2的晶粒度为5~10 nm,平均颗粒粒度约35 nm,且粒度均匀。更多还原

【Abstract】 The series samples of Ti_1-xCe_xO₂（x=0,0.01,0.02,0.04,0.06,0.07 and 0.09） were prepared by Sol-Gel process.The particle sizes,morphologies,solid solution range and phase relations of Ti_1-xCe_xO₂ samples were studied by XRD,TEM and HR-TEM.Meanwhile,the Rietveld refinement method was employed to study the effect of Ce doped to crystal structure of TiO₂.The results show that the solid solution of Ti_1-xCe_xO₂ can be formed by doping of Ce to TiO₂,and x=0⁰.06.The crystallization size of Ti_1-xCe_xO₂ is about 5¹0 nm,its average particle size is about 35 nm,and they are uniform.更多还原