Cerium oxide has attracted attention in catalyst,as it has special capability of redox.In this paper,the preparation technology of nano-particle cerium-oxide materials is introduced through the hydrothermal synthesis and precipitation method by template leading.In the sodium hydride and ammonia system,the nanostructure cerium-oxide particles,with wider acromion and common shoulder peak of CeO_2 and Ce_2O_3 and with the mean particle size of 5~15nm and a specific surface area of 128.52m~2/g,have been obtaine...