微波辅助一步合成介孔CeO_2-SBA-1  

One step synthesis of mesoporous CeO_2-SBA-16 under microwave irradiation

作　　者：赵国峥[1,2] 李长波[2] 李夏[2] 张洪林[1] 葛蒙[2] 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001

出　　处：《应用化工》2016年第4期608-612,616,共6页Applied Chemical Industry

基　　金：国家科技重大专项课题(2012ZX07202-002)

摘　　要：以三嵌段共聚物F127为模板剂,Na_2SiO_3·9H_2O作为硅源,Ce(NO_3)_3·6H_2O为铈源,在酸性条件下,微波辅助一步合成了三维有序介孔CeO_2-SBA-16。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、N2吸附脱附等手段对样品进行表征。研究了硅源与铈源投加量、搅拌时间及微波加热时间对介孔CeO_2-SBA-16结构的影响。结果表明,当硅源与铈源的投加量均为4.71 g,搅拌时间为3 h,微波加热120 min,可得到具有有序介孔孔道的CeO_2-SBA-16,BET方法得到该Ce O2-SBA-16的比表面积为322.8 m^2/g,孔容为0.342 cm^3/g,平均孔径为8.821 nm。The three-dimensional ordered mesoporous CeO_2-SBA-16 was synthesized one step using triblock copolymer F127 as template,Na_2SiO_3·9H_2O and Ce（ NO_3）_3·6H_2O as the source of silicon and cerium,under acidic conditions by microwave irradiation. The mesostructures and morphology of the resultant samples were characterized by XRD,SEM,TEM and N_2 adsorption-desorption. The effect of the dosage of silicon and cerium,stirring time and microwave heating time on the mesostructure was investigated. The results indicate that when the silicon source and the cerium source dosage are 4.71 g,stirring time is 3 h,microwave heating 120 min,the CeO_2-SBA-16 with ordered mesoporous channel can be obtained. BET method get the specific surface area is 322.8 m^2/ g,pore volume is 0. 342 cm^3/ g and average pore size is 8. 821 nm.

关 键 词：微波 CeO2-SBA-16 介孔 表征 

分 类 号：TQ127.2[化学工程—无机化工] O611.4[理学—无机化学]