Water in the precursor was removed by azeotropic distillation with n-butyl alcohol as an entrainer,and then it was dried and calcined to get nanocrystalline ceria.

• 用碳酸氢铵做沉淀剂,采用化学共沉淀法制备纳米氧化铈的前驱体,并以正丁醇为共沸剂经过共沸精馏除去前驱体中的水分,然后再烘干、煅烧制备了纳米氧化铈晶体。