温和条件下催化合成纳米镧系金属氢化物及纳米NaH高活性研究

【作者】 武美霞；

【导师】 范荫恒；

【作者基本信息】 辽宁师范大学 ， 物理化学， 2003， 硕士

【摘要】 1．本论文首次提出一种在温和条件下催化合成纳米尺寸的镧系金属氢化物的方法，介绍在常温常压下，镧、钕、钐、镝、镱五种镧系金属在四氢呋喃(THF)溶剂中，催化剂作用下与氢气直接化合形成相应的纳米尺寸的镧系金属氢化物。借助透射电镜(TEM)、X射线粉末衍射(XRD)和BET法对其产物进行了表征。TEM测试表明所得产物的平均颗粒直径在20-40nm范围内。同时对合成中多种反应参数的影响进行了考察。更多还原

【Abstract】 1 Lanthanide hydrides (M = La, Nd, Sm, Dy and Yb) can be prepared easily by the direct hydrogenation of lanthanide metals catalyzed by TiCl4 in tetrahydrofunan (THF) under normal pressure. The rate of hydrogenation decreased with increasing atomic number of lanthanides. Transmission electron micrographs showed that the resulted lanthanide hydrides were in the form of nanoparticles with an average primary particle size around 20-40 nm. The structures of their hydrides were characterized by the X-ray powder diffraction (XRD) method. And the effects of the various parameters to the catalytic synthesis reaction of lanthanide hydrides were discussed.更多还原