Mg_(1.5)Ti_(1.25)O_4用于锂离子交换的实验研究  

Experimental study of Mg_(1.5)Ti_(1.25)O_4 for Li^+ ion-exchange

作　　者：江津河[1] 刘方旺 闫永美[1] 曹长青[2] JIANG Jinhe;LIU Fangwang;YAN Yongmei;CAO Changqing(Department of Chemistry and Chemical Engineering,Weifang University,Weifang 261061,Shandong,China;Department of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266000,Shandong,China)

机构地区：[1]潍坊学院化学化工学院,山东潍坊261061 [2]青岛科技大学化工学院,山东青岛266042

出　　处：《化工进展》2017年第8期3002-3005,共4页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金项目(51541205)

摘　　要：一定温度下,用固相反应结晶的方法合成具有尖晶石结构的金属复合氧化物Mg_(1.5)Ti_(1.25)O_4。尖晶石型金属复合氧化物在化学组分及化学计量数方面有非常灵活的特性,在维持自身晶体结构不变的条件下,通过改变自身化学计量数的方法可插入或者抽出一些替换离子。尖晶石型金属复合氧化物作为离子交换剂具有热稳定性强、抗辐射能力强、合成简单以及良好的选择性等优点。本文对合成的尖晶石型金属复合氧化物Mg_(1.5)Ti_(1.25)O_4进行了实验表征,包括X射线衍射仪结构表征,检测酸性条件下Li^+的抽出值、饱和交换容量值测量、分配系数测定等。实验研究结果表明,本复合氧化物结构稳定,能够插入或者抽出Li^+,具有较高的Li^+选择性和离子记忆性。用硝酸处理过的样品对Li^+交换容量达到9.7mmol/g。The metal compound oxide Mg1.5Ti1.25O4with a spinel-type structure was synthesized by the method of solid state reaction crystallization at fixed temperature.This spinel had versatile characteristics in respect of its chemical composition and stoichiometric number.It could be inserted or extracted some substitutable ions through changing stoichiometric number while keeping its own structure.Spinel-type metal compound oxide had advantages of better thermal stability,strong radiation resistance,simple preparation and good selectivity.The properties of Mg1.5Ti0.25O4such as XRD,Li+extraction value,saturation capacity of exchange and distribution coefficient have been determined.The experimental results showed that this compound oxide had a stable structure.It could be inserted or extracted Li+and has good Li+selectivity and ion memory property.The samples which were treated by nitirc acid have a9.7mmol/g ion exchange capacity for Li+.

关 键 词：尖晶石型结构 复合金属氧化物 离子交换容量 

分 类 号：TQ016.1[化学工程]