使用尿素水热法合成了均匀的二氧化铈球型纳米材料.纳米球是由纳米层以及纳米颗粒所构成的核壳结构,其平均粒径为320nm,同时表面主要暴露{111}晶面.尿素水解所产生的氨气分子为纳米球状结构的形成提供了模板,而生成的碳酸根与氢氧根离子作为铈离子的沉淀剂.使用氢气程序升温还原技术表征了氧化铈纳米球材料的氧化还原能力,同时以一氧化碳氧化为探针反应研究了其催化性能. Homogeneous ceria spherical nanomaterials were synthesized by urea hydrothermal method.The nanospheres are core-shell structures composed of nanosheets and nanoparticles with an average particle size of 320 nm, while the {111} crystal planes are mainly exposed on the surface. Ammonia molecules produced by urea hydrolysis provide a template for the formation of nanospheres, and the generated carbonate and hydroxide ions act as precipitants for cerium ions. The oxidation of cerium oxide nanosphere materials was characterized by hydrogen temperature-programmed reduction Reduction ability, at the same time, the catalytic performance of carbon monoxide oxidation was investigated.