新型介孔钛硅分子筛的合成和表征  

Synthesis and Characterization of Mesoporous Titanosilicates

作　　者：孙永安[1] 徐玲[1] 贾美林[2] 

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028000 [2]内蒙古师范大学化学与环境科学学院,呼和浩特010022

出　　处：《内蒙古大学学报（自然科学版）》2009年第4期425-430,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金(20563003);内蒙古自治区高校科研项目基金(NJzy08084)

摘　　要：采用廉价的柠檬酸作为成孔剂,通过简单的制备方法合成出一系列新型介孔钛硅分子筛材料.考察柠檬酸的加入量对样品孔结构以及其它方面的影响.并对制备的样品采用X-射线粉末衍射(XRD)、红外(FT-IR)、N2吸附-脱附、透射电镜(TEM)和紫外-可见(U v-v is)等手段对其进行表征.从表征结果来看,该系列材料具有较高的BET比表面积,B JH孔径随着成孔剂柠檬酸量的增加而逐渐增大.焙烧后的样品在225 nm具有归属于四配位钛的紫外吸收,证明钛已经被引入到介孔分子筛骨架中,该系列材料可能在大分子氧化反应方面存在着潜在的应用价值.A new type of mesoporous titanosilicates was synthesized by citric acid as pore agents. The mesoporous titanosilicates was investigated by XRD,FT-IR,N2 adsorption/desorption, TEM, and Uv-vis techniques. The characteristic results show that mesoporous titanosilicates molecular sieves have larger BET surface areas than that of the conventional molecular sieves. In addition, the pore sizes of mesoporous titanosilicates increase with the addition of citric acid. The peak of 225 nm is ascribed to the adsorption of tetra-coordinated titanium. The results indicate that the titanium has been incorporated into the skeleton of mesoporous molecular sieves. The new materials may have application in the large molecular oxidization.

关 键 词：介孔钛硅材料 柠檬酸 分子筛 

分 类 号：O643[理学—物理化学]