新型特效钠离子吸附剂Li_(1+x)La_xZr_(2-x)(PO_4)_3的制备和性能研究  

Study on Preparation and Properties of Novel Na^+ Specific Adsorb-ent Li_(1+x)La_xZr_(2-x)(PO_4)_3

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

机构地区：[1]中国科学院青海盐湖研究所

出　　处：《化学学报》2006年第2期182-186,共5页Acta Chimica Sinica

基　　金：国家'十五'重点科技攻关计划滚动项目课题(No.2004BA602B-01)资助项目.

摘　　要：采用高温固相法合成了新型特效Na离子吸附剂Li1+xLaxZr2-x(PO4)3.对不同条件下合成的吸附剂进行了XRD结构分析以及SEM分析和IR分析,并对其吸附性能进行了测定.XRD结构分析表明,当x≤0.4时均能得到与LiZr2(PO4)3相同的晶体结构.SEM分析表明,合成的吸附剂分散性好,粒径范围在5～20μm之间.吸附性能测定结果表明,少量La的加入使Li1+xLaxZr2-x(PO4)3对Na离子产生了特效吸附作用,La离子掺杂是改善LiZr2(PO4)3吸附性能的一条有效途径,当x=0.4时,在pH值为10.0～11.0条件下,Li1+xLaxZr2-x(PO4)3的吸附容量达到48.3mg/g.A series of novel kind of Na^＋ specific adsorbent compounds Li1＋xLaZr2-x（PO4）3 were synthesized by high temperature solid state reaction method. The samples were characterized by XRD, SEM, IR techniques and their adsorption performances were investigated. XRD analysis showed that a structure of LiZr2（PO4）3 could be found in the composition range of x≤0.4. SEM analysis showed that they were highly dispersive particles with diameters of 5～20 μm. The investigation of the adsorption properties showed that the low concentration La dopant （x≤0.4） made it adsorb sodium selectively, and also confirmed that the La ion dopant was an effective method to improve the adsorption properties. The exchange capacity was 48.3 mg/g, under x=0.4, pH= 10.0～ 11.0 in LiC1 solution.

关 键 词：Li1+xLaxZr2-x(PO4)3 吸附剂 制备 固相反应 

分 类 号：TQ424[化学工程] TS202.3[轻工技术与工程—食品科学]