新型特效Na离子吸附剂Li_(1+x)Al_xTi_(2-x)(PO_4)_3的光谱研究  

Spectral Studies of Novel Na Specific Adsorbent Li_(1+x)Al_xTi_(2x)(PO_4)_3

作　　者：孙建之[1] 邓小川[1] 宋士涛[1] 魏述彬[1] 马培华[1] 

机构地区：[1]中国科学院青海盐湖研究所

出　　处：《光谱学与光谱分析》2006年第10期1943-1947,共5页Spectroscopy and Spectral Analysis

基　　金：国家"十五"重点科技攻关计划滚动项目课题(2004BA602B-01);中国科学院知识创新工程重要方向项目(KZCX3-SW-322)资助

摘　　要：采用高温固相法合成了新型特效Na离子吸附剂Li1＋xAlxTi2-x（PO4）3。用XRD，FTIR，Raman等手段研究了其结构形态；对材料的激光拉曼光谱和红外光谱进行了研究和指认；并对其吸附性能进行了研究。结果表明少量Al的加入未影响到LiTi2（PO4）3的晶体结构，但使Li1＋xAlxTi2-x（PO4）3对Na离子产生了特效吸附作用，可用于高纯锂盐制备过程中微量杂质钠离子的分离。其最佳吸附条件为：当x=0.4时，在pH值为10．0～11．0条件下，Li1＋xAlxTi2-x（PO4）3的吸附容量达到11．76mg·g^-1。A novel Na specific adsorbent Li1＋xAlxTi2-x（PO4）3 was synthesized by high temperature solid state reaction method. The samples were characterized by X-ray diffraction（XRD） and scanning electron microscope（SEM）. Raman and FTIR spectroscopic studies of these materials were carried out, and the vibrational bands were assigned. Their adsorption performances were investigated. The results indicate that the low concentration（x〈0. 6） Al dopant does not affect the structure of the material but makes it able to selectively adsorb sodium. The adsorbing test results show that its exchange capacity is high with the maximum value of adsorption capacity of 11.76 mg·g^-1 at x=0.4 and pH=10. 0-11.0. So it can be used to remove the microamounts impurity-sodium in the production of high purity lithium salt.

关 键 词：吸附剂 含锂磷酸盐 X射线衍射 红外光谱 拉曼光谱 

分 类 号：O657.3[理学—分析化学] O647.3[理学—化学]