锰钛系复合锂离子筛的制备及其吸附性能研究  

Preparation of Manganese Titanium Composite Lithium Ion-Sieve and Research on Absorptive Property

作　　者：石西昌[1] 尹世豪[1] 唐天罡[1] 杨喜云[1] 徐徽[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《材料导报》2014年第8期13-16,27,共5页Materials Reports

基　　金：国家十一五科技支撑计划项目(2008BAB35B04)

摘　　要：以LiOH·H2O为锂源、锰钛共沉物作为锰源和钛源,采用共沉淀-水热合成法合成掺钛复合锂离子筛。研究了合成条件对复合锂离子筛的结构和性能的影响,使用X射线衍射(XRD)对合成样品进行表征,通过酸浸和吸附实验研究了合成样品吸附锂的性能和溶损率。研究结果表明:当Ti、Mn物质的量比为0.03,水热反应母液中锂浓度为3.2mol/L,反应温度为230℃,反应时间为12h时合成的离子筛具有较好的吸附性能和稳定性,对Li+的最大饱和吸附容量达到19.71mg·g-1,同时,Mn和Ti保持了较低的溶损率。The lithium ion-sieve doped titanium were synthesized by co-precipitation and hydrothermal synthesis method with LiOH · H2 O as lithium source and manganese titanium deposit as manganese and titanium source.Several conditions of synthesis composite lithium ion-sieve were investigated.The structure and composition of the samples were characterized by X-ray diffraction （XRD）.The absorption capacity and loss ratio of the samples were studied by acid leaching and absorption experiments.The results showed that the lithium ion-sieve had the best stability and absorption properties when Ti/Mn mole ratio was 0.03,lithium concentration in hydrothermal reaction solution was 3.2 mol/L,reaction temperature was 230 ℃,reaction time was 12 h.The sample which synthesized under optimal conditions showed the maximum absorption capacity for Li＋ of 19.71 mg · g^-1 and Mn and Ti maintained a lower loss ratio at same time.

关 键 词：共沉淀 水热合成法 复合锂离子筛 吸附 稳定性 

分 类 号：TQ137.1[化学工程—无机化工]