摘要
以PEG-4000为模板剂,采用水热法制备了具有萤石型立方相结构的Ce0.5Zr0.5O2固溶体,考察了共沉淀pH、PEG-4000添加量、水热温度、焙烧温度对样品的物相、比表面积、孔径分布、N2吸附脱附特性等的影响。结果表明:当PEG/(Ce+Zr)(摩尔比)为0.3,共沉淀pH值约为10,120℃下水热反应12 h,烧结温度为500℃时,所得产品的比表面积为146.7 m2.g-1,平均孔径为12.50 nm。
Cerium-zirconium solid solution with fluorite cubic structure was prepared by the hydrothermal method with polyethylene glycol （PEG） as template. The influences of the coprecipitation pH, quantity of PEG, hydrothermal temperature, sintering temperature to the surface area, distribution of pore size, and characteristics of nitrogen adsorption-desorption were investigated. The results showed that when the eopre-cipitation pH was about 10, the hydrothermal temperature and time were 120 ℃ and 12 h respectively, and sintering temperature was 500℃, then the molar ratio of polyethylene glycol to ceria-zirconia was 0. 3, and the specific surface area and mean pore size of the obtained sample were 146.7 m^2 .g^-1 and 12.50 nm respectively.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2009年第2期297-301,共5页
Journal of the Chinese Society of Rare Earths
基金
催化材料科学湖北省暨国家民委-教育部共建重点实验室资助项目(CHCL0501)
关键词
铈锆固溶体
聚乙二醇
比表面积
水热制备
稀土
cerium-zirconium solid solution
polyethylene glycol
specific surface area
hydrothermal preparation
rare earths
