表面富钛复合钛硅分子筛的合成与表征  

Synthesis and characterization of composite titanosilicate molecular sieve with enriched Ti species on its surface

作　　者：尹文胜[1] 龙立华[1] 

机构地区：[1]中国石油化工股份有限公司催化剂湖南建长石化股份有限公司,湖南岳阳414012

出　　处：《工业催化》2014年第6期447-451,共5页Industrial Catalysis

摘　　要：以全硅分子筛silicalite-1为硅源,利用水热晶化法合成表面富钛的钛硅分子筛CTS,采用XRD、N2吸附-脱附、IR、XRF、UV-vis、XPS、DTA-TGA和SEM等对合成的分子筛进行表征。结果表明,合成的钛硅分子筛CTS具有MFI拓扑结构,钛物种主要集中在其表面,催化性能评价表明,在苯酚羟基化探针反应中合成的钛硅分子筛CTS具有较好的活性和苯二酚选择性,重复使用次数优于常规利用硅酯为硅源合成的分子筛TS-1。Using silicalite-1 molecular sieve as Si-soume,comix^ite titanosilicate molecular sieve with enriched Ti species on its surface was prepared via hydrothemal synthesis method, and were characterized by means of XRD, N2 adsorption-desorption, IR, XRF, UV-vis, XPS, DTA-TGA and SEM. The results showed that Ti species were mainly distributed on the surface of composite titanosilicate molecular sieve with enriched Ti species and the as-synthesized molecular sieve possessed MFI topological structure. The results of catalytic probe reaction of phenol hydroxylation indicated that composite titanosilieate molecular sieve with enriched Ti species on its surface exhibited better catalytic activity and selectivity to dihydroxyhenzene, and its reusability was superior to that of titanium silicalite-1 （ TS-1 ） synthesized by using estersil as the silicon source.

关 键 词：催化剂工程 钛硅分子筛 表面富钛 氧化 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]