无机SiO_2-TiO_2前驱体体系合成高性能TS-1分子筛  

Synthesis of TS-1 with High Catalytic Performance Using Inorganic SiO_2-TiO_2 Precursor

作　　者：张海娇[1] 刘月明[1] 何鸣元[1] 吴鹏[1] 

机构地区：[1]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《催化学报》2006年第9期749-751,共3页

基　　金：新世纪优秀人才支持计划;上海市浦江人才计划;国家自然科学基金(20473027);上海市科委(05DZ22306);国家重点基础研究发展计划(973计划)(2006CB202508);高等学校博士学科点专项科研基金(20050269013);华东师范大学2006年优秀博士研究生培养基金资助项目.

摘　　要：在热处理条件下,使Ti(SO4)2在多孔硅胶表面自发分散形成具有类似于钛硅分子筛催化活性中心结构单元的Si-O-Ti键的SiO2-TiO2前驱体,将该前驱体在模板剂四丙基氢氧化铵的作用下水热晶化得到了钛硅分子筛TS-1.X射线衍射、红外光谱和扫描电镜表征表明,TS-1分子筛晶化完全,钛原子已进入TS-1分子筛骨架.苯酚羟基化反应测试结果表明,前驱体的热处理温度对合成的TS-1分子筛的催化性能影响很大,处理温度以450℃为宜.The inorganic SiO2-TiO2 precursor having Si-O-Ti bonds similar to those present in the titanium silicalite （TS-1） molecular sieve was prepared through spontaneous dispersion of Ti（SO4）2 on amorphous porous silica by thermal treatment. The precursor was used as the silica and titanium sources to synthesize TS-1 using tetrapropylammonium hydroxide as the template under hydrothermal crystallization conditions. Characterization by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy indicated that the TS-1 sample with MFI structure was well crystallized and the Ti atoms were successfully incorporated into the framework. The catalytic activity of TS-1 for the hydroxylation of phenol with dilute hydrogen peroxide showed that the treatment temperature of the SiO2-TiO2 precursor obviously influenced the catalyst performance, and the proper treatment temperature was about 450℃.

关 键 词：TS-1分子筛 自发分散 二氧化硅 二氧化钛 前驱体 

分 类 号：O643.36[理学—物理化学]