高比表面积纳米CeO2的制备  

Synthesis of Nano-CeO_2 with High Specific Surface Area

作　　者：郭存霞[1] 王月娟[1] 金炜阳[1] 罗孟飞[1] 鲁继青[1] 

机构地区：[1]浙江师范大学物理化学研究所,浙江省固体表面反应化学重点实验室,浙江金华321004

出　　处：《稀有金属》2009年第6期874-878,共5页Chinese Journal of Rare Metals

基　　金：国家自然科学基金(20473075);浙江自然科学基金(Z404383)资助项目

摘　　要：采用模板法制备高比表面积纳米CeO2。详细考察了铈盐和NaOH滴加速度、晶化时间和温度、铈盐种类、表面活性剂用量等对CeO2比表面、晶粒尺寸的影响。结果表明,当CeCl3加入速度=2.5 m.lmin-1、NaOH加入速度=3 ml.min-1、晶化温度=90℃、晶化时间=24 h、CeCl3∶C12H25SO4Na∶NaOH∶H2O=1∶2.7∶7.3∶1100(摩尔比)、焙烧温度=200℃时,CeO2的比表面积和晶粒尺寸分别为457 m2.g-1和2.0 nm。这种高比表面纳米CeO2与常规CeO2相比,具有独特的物理、化学性质,有望成为一种应用广泛的新型材料。A series of nano-sized CeO2 particles with high specific surface area were synthesized using a surfactant-assisted method. Variation of preparation conditions, such as addition rate of Ce salt and NaOH, aging time and temperature, kinds of Ce salts, amount of surfactants, resulted in differences in surface area and crystallite size of CeO2. CeO2 with the highest specific surface area （457 m2 ·g-1 ） and particle size of 2 nm was synthesized under the optimized condition,with a CeC13 addition rate of 2.5 ml .min-1, NaOH addition rate of 3 ml· min-1, aging temperature of 90 ℃ , aging time of 24 h, CeCl3 ： C12 H25SO4Na ： NaOH： H2O of 1：2.7：4.3：1100 （molar） and calcination temperature of 200℃. Compared with normal CeO2, the high-surface area CeO2 had unique physical and chemical properties, so it could be a promising material with potential application.

关 键 词：高比表面 纳米 二氧化铈 

分 类 号：O614.33[理学—无机化学]