离子交换法制备纳米CeO_2晶体  

Preparation of Nanometer CeO_2 Crystal by Ion Exchange Process

作　　者：李小忠[1] 王连军[1] 赵铭[1] 李健生[1] 孙秀云[1] 

机构地区：[1]南京理工大学化工学院,南京江苏210094

出　　处：《稀有金属》2006年第2期189-192,共4页Chinese Journal of Rare Metals

基　　金：教育部博士点基金项目(B20020288015)资助

摘　　要：提出一种以99.995%Ce(NO3)3为原料,强碱性阴离子交换树脂为交换介质,采用离子交换法制备高纯度的纳米CeO2晶体的新方法。就离子交换反应过程中的Ce3+浓度、树脂加入速度和离子交换温度及Ce(OH)3的煅烧温度等条件对CeO2粒径的影响进行了探讨,得出了离子交换法制备纳米CeO2晶体的最佳工艺条件。FT-IR,TEM和XRD分析表明,离子交换法无需对合成的Ce(OH)3溶胶进行洗涤即可去除NO3-,CO32-等阴离子杂质,将该溶胶真空干燥后,在空气中于100℃下焙烧4h得粒径分布均匀、平均晶粒尺寸约5nm,高纯度的CeO2粉体。A novel method to synthesize CeO2 crystal of high purity was developed by using 99.995% Ce（NO3）3 as raw materials and strongly basic anionexchange resins as exchange medium. The effects of concentration of Ce^3＋ , velocity of resins putted in, ion exchange temperature and calcination temperature on particle diameter of CeO2 were also discussed and the optimum conditions were o and XRD show that Ce（ CO3^2- can be prepared by out washing, then the CeO2 synthesized by vacuum Ce（OH）3-sol at 100℃ for ameter of 5 nm and good d

关 键 词：离子交换法 纳米二氧化铈晶体 强碱性阴离子交换树脂 杂质 

分 类 号：O614.33[理学—无机化学]