有序介孔CeO_2的合成及其催化性能  

Synthesis and Catalytic Performance of Ordered Mesoporous CeO_2

作　　者：赵晓兵[1,2] 钱前[1] 凡晶晶[3] 陈志刚[3] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]常州大学先进金属材料常州市重点实验室,江苏常州213164 [3]苏州科技学院化学与生物工程学院,江苏苏州215011

出　　处：《硅酸盐学报》2011年第11期1773-1779,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(21071107)资助项目

摘　　要：以介孔氧化硅(SBA-15)为模板,采用水热法合成有序介孔CeO2。利用X射线衍射仪、N2吸附脱附仪、透射电子显微镜和热重分析仪对样品进行表征。研究了SBA-15与硝酸铈摩尔比对介孔CeO2结构和性能的影响,并对所制备的介孔CeO2进行储放氧性能(oxygen storage/release capacity,OSC)进行测试和酸性品红降解实验。结果表明:当SBA-15与硝酸铈的摩尔比为1:1、水热反应温度为80℃、焙烧温度为500℃时,可得到具有有序介孔孔道的CeO2,介孔CeO2的OSC值为140.2μmol/g,是粉末状CeO2的1.66倍。介孔CeO2对酸性品红脱色率接近100%,远高于粉末状CeO2对酸性品红的脱色率(60%)。The ordered mesoporous CeO2 was synthesized by a hydrothermal method using SBA-15 as a template.The microstruc-tures and performance of the resultant samples were characterized by X-ray diffractometer,N2 adsorption–desorption equipment,transmission electron microscope and thermogravimetry.The effect of the mole ratio of SBA-15 to cerium nitrate on the microstruc-ture and performance of the mesoporous CeO2 was investigated.The oxygen storage/release capacity（OSC） and decolorizing effi-ciency of the mesoporous CeO2 for acid magenta were also analyzed.The results indicate that the ordered mesoporous CeO2 can be obtained when mole ratio of SBA-15 to cerium nitrate is 1：1,hydrothermal temperature is 80 ℃ and calcining temperature is 500 ℃.The OSC value of the mesoporous CeO2 was 140.2 μmol/g,which was 1.66 times more than that of CeO2 powder.The decolorizing efficiency of the mesoporous CeO2 for acid magenta was close to 100%,which was greater than that of the powdered CeO2（60%）.

关 键 词：硬模板 介孔氧化铈 水热反应 催化性能 

分 类 号：O611.4[理学—无机化学] O614.33[理学—化学]