堇青石载体上TS-1晶体的生长控制与机理  

Controlled Growth and Mechanism of TS-1,Crystal on Corderite Support

作　　者：祝尊路 杨立斌[1] 沙作良[1] 

机构地区：[1]天津市海洋资源与化学重点实验室,天津科技大学海洋科学与工程学院,天津300457

出　　处：《天津科技大学学报》2013年第6期36-39,共4页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金资助项目(21076157);天津市海洋资源与化学重点实验室重点基金项目(201001)

摘　　要：以四丙基氢氧化铵(TPAOH)为模板剂,正硅酸乙酯(TEOS)为硅源,钛酸四丁酯(TBOT)为钛源,采用水热合成结晶法在堇青石载体上结晶生长TS-1晶体.实验考察了在175,℃、结晶时间3,d的条件下,不同水与硅源比例(硅源质量分数)、模板剂质量分数对TS-1晶体在堇青石载体上生长及其粒径的影响;同时通过SEM、ATR-FTIR、XRD表征手段分析TS-1晶体颗粒在堇青石载体上生长机理.结果表明,TS-1合成前驱液中硅源和模板剂质量分数直接影响TS-1晶体在堇青石载体上结晶过程中的骨架胶团浓度和过饱和度,通过控制过饱和度可以调控堇青石载体上TS-1纳米晶体颗粒的大小.Titanium silicalite-1 （TS-1）membranes were prepared to grow on cordierite support under hydrothermal treatment, using TPAOH as template, TEOS as silicate source, and TBOT as titanium source. The effect of ratios of Si/H2O and concentrations of structure-directing agent （SDA） synthesized at 175 ℃ for 72 h was studied throughout experiments. TS- 1 nanocrystal growing on cordierite support was analyzed with scanning electron microscope （SEM）, X-ray diffractome- ter （XRD） and ATR-FTIR. The result indicates that the mechanism of TS-1 growth on cordierite support is that the concentration of skeleton micelle and supersaturation of TS-1 precursor in the process of hydrothermal crystallization directly control the growth of TS-1 nanocrystal on the cordierite support.

关 键 词：钛硅分子筛-1 水热合成 堇青石载体 晶体生长 纳米晶体 

分 类 号：O643[理学—物理化学]