摘要
以Al(NO3)3·9H2O和Ce(NO3)3·6H2O为原料,氨水为pH值调节剂,并加入少量表面活性剂PEG4000,采用化学共沉淀法制备了前驱体,前驱体经高温热处理得到含25%(质量分数)CeO2的CeO2/γ-Al2O3复合纳米晶。通过正交试验,获得了共沉淀的优化条件:pH值为9～10,反应温度约30℃,反应时间为20min,表面活性剂用量为0.44%(质量分数),前驱体热处理温度800℃为宜。使用TG/DTA、XRD、BET、IR、纯度及化学成分分析等方法对CeO2/γ-Al2O3复合纳米晶的性能进行了表征。
Using Al(NO_3)_3·9H_2O and Ce(NO_3)_3·6H_2O as raw material,NH_3·H_2O as regulator for pH,adding a few of PEG4000 as surfactant,the precursor was prepared by co-precipitation method. After high temperature calcination, the CeO_2/γ-Al_2O_3 composite nanoparticles were prepared. The optimal preparing condition of composite nanoparticles are proposed:pH9~10;reacting temperature:30℃;reacting time:20 min;surfactant:0.44wt%;calcination temperature of the precursor:800℃. And the composite nanoparticles were studied by TG/DTA,XRD,BET,IR and chemical composition and purity analysis.
出处
《稀土》
EI
CAS
CSCD
北大核心
2004年第6期10-14,25,共6页
Chinese Rare Earths
基金
湖南自然科学基金资助项目(03JJY3015)
国家教育部高等学校骨干教师资助项目
