沉淀法制备介孔二氧化铈  

Preparation of mesoporous CeO_2 by precipitation method

作　　者：谭宁会[1] 刘应亮[1] 徐丽[1] 

机构地区：[1]暨南大学化学系纳米化学研究所,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2010年第1期67-70,共4页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省自然科学基金团队项目(05200555)

摘　　要：以硫酸高铈、二乙烯三胺为原料,氨水做沉淀剂,合成了具有立方萤石晶相结构的介孔二氧化铈(CeO2),讨论了反应物配比、反应温度、氨水的加入量等实验条件对介孔CeO2比表面积的影响.通过X射线衍射、BET孔径性能测试等分析手段对产物进行了表征,实验结果表明:在硫酸高铈与二乙烯三胺的摩尔比为1∶2,反应温度为80℃,陈化时间为12 h的条件下,制得了比表面积为157 m2/g的介孔CeO2.Mesoporous CeO2 powder with crystalline pore walls and cubic fluorite structure was synthesized by chemical precipitation method using ceric sulfate tetrahydrate and diethylenetriamine as raw materials and ammonia as precipitant. The effects of several factors, such as the mole ratio of reactants, reaction temperature and volume of ammonia, on specific surface area were investigated. X-ray diffractometry （XRD） and BET method were used to analyze and characterize the products. The results showed that mesoporous CeO2 with specific surface area of 157 m^2/g was prepared, when the ratio of Ce to diethylenetriamine was 1：2, the reaction temperature and the aging time was 86℃ and 12 h, respectively.

关 键 词：介孔二氧化铈 沉淀法 比表面积 

分 类 号：O614.33[理学—无机化学]