摘要
Superfine composite powders of CeO2-ZrO2 (CZ) and CeO2-ZrO2-La2O3 (CZL) were prepared by hydrothermal method. The effects of pH?temperature and time for hydrothermal process on the performance of the resulting powders were studied. The optimized reaction parameters were on follows: the precursor′s pH≈9.0, hydrothermal temperature of 200 ℃ holding for 2 h. Thermal stable powders with average particle size smaller than 10 nm and specific surface area of 171 m2·g-1 were obtained. A BET specific surface area was still at 44 m2·g-1 after calcination at 1 000 ℃ for 6 hours.
Superfine composite powders of CeO2-ZrO2 (CZ) and CeO2-ZrO2-La2O3 (CZL) were prepared by hydrothermal method. The effects of pH,temperature and time for hydrothermal process on the performance of the resulting powders were studied. The optimized reaction parameters were on follows: the precursor's pH approximate to 9.0, hydrothermal temperature of 200 T holding for 2 h. Thermal stable powders with average particle size smaller than 10 nm and specific surface area of 171 m(2 .) g(-1) were obtained. A BET specific surface area was still at 44 m(2 .) g(-1) after calcination at 1000 degrees C for 6 hours.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2005年第8期1227-1230,共4页
Chinese Journal of Inorganic Chemistry
基金
广东省重大专项(No.A10701)
广东省自然科学基金团队项目(No.04205301)资助。
关键词
水热法
氧化铈
氧化锆
hydrothermal method
ceria
zirconia
supercritical dryness