摘要
CeO2 precursors were prepared by the homogeneous precipitation method, hydrothermal synthesis method and hydrothermal precipitation coupling method using urea as a precipitator.The results indicated that urea was a reserve resource of CO 2- <sub>3.CeO2 precursors were orthorhombic Ce2O（CO3） 2·H2O, hexagonal Ce（OH）（CO3） , orthorhombic CeO（CO3）2·H2O respectively when the homogeneous precipitation method, hydrothermal synthesis method and hydrothermal precipitation coupling method were used.The synthesis technology had a great effect on the precursors.Different precursors were synthesized through various processes and mechanisms.When heated up to the temperature of 500℃, the precursors were all finally changed into face centred cubic CeO 2 powders.
CeO2 precursors were prepared by the homogeneous precipitation method, hydrothermal synthesis method and hydrothermal precipitation coupling method using urea as a precipitator. The results indicated that urea was a reserve resource of CO3^2-. CeO2 precursors were orthorhombic Ce2O（CO3）2· H2O, hexagonal Ce（OH） （CO3）, orthorhombic CeO（CO3 ）2 · H2O respectively when the homogeneous precipitation method, hydrothermal synthesis method and hydrothermal precipitation coupling method were used. The synthesis technology had a great effect on the precursors. Different precursors were synthesized through various processes and mechanisms. When heated up to the temperature of 500℃, the precursors were all finally changed into face centred cubic CeO2 powders.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第9期2241-2244,共4页
CIESC Journal
关键词
CEO2
尿素
沉淀剂
前驱体
制备
cerium oxide
urea
precipitator
precursor
preparation
