种晶介导的二氧化铈球状粒子的形成

文章报道了一种以不同数量种晶介导合成CeO2多晶纳米颗粒的制备方法,分析以种晶介导球状的CeO2的形成机理。在生长阶段,CeO2粒子通过初级粒子在其表面的沉积来生长,从而降低了粒子的表面能,导致由许多初级粒子组成的次级粒子的形成。加入的一定量的紧密堆积的种晶聚集体优先作为初级粒子的沉积中心来降低它们的表面能,从而减小次级粒子的尺寸、增加其均匀性以及促进这些次级粒子的形成。

Synthesis of Ce02 Spherical-like Particles by Seed-mediated Method

In the paper, a seed-mediated synthesis method for preparation of Ce02 particles with variation of seeds amount was exported, and the formation mechanism was analyzised. During the growth stage, CeO2 particles grew with deposition of the primary nanoparticles other than the monomers to reduce the surface energy of particles, leading to the formation of secondary particles consisting of many primary particles. The densely piled seeds were added and used as the deposition centers of the primary particles formation of these to minimize their surface energy, resulting secondary particles.