摘要
利用固相反应热结晶的方法合成尖晶石型复合金属氧化物Li_2Mn_（0.5）Ti_（0.5）O_3。具有尖晶石型结构的氧化物,可以在嵌入替代离子改变自身氧和锂化学计量数的同时,维持晶体结构的稳定性。这种特性能够用于离子交换研究,用来满足提取锂的需求。采用X-射线衍射方法、原子吸收检测法、Kd值检测等方法对所合成的复合金属氧化物进行锂离子脱嵌性能测试。实验分析表明,离子交换机理是实现锂离子脱嵌的主要原因,硝酸浸出锂离子后的实验样品对锂离子的交换能力高达6.2 mmol/g。
The spinel-type compound metal oxide Li_2Mn_（0.5）Ti_（0.5）O_3 was synthesized using solid crystallization reaction.The oxide with spinel-type structure can insert alternative ions and change the stoichiometric number in lithium and oxygen.Besides,it can keep spinel-type structure stability.This characteristic can be used for ion exchange to meet requirement of extracting lithium.The Li＋extraction/insertion performance of this material was investigated by X-ray,atomic absorption detection and Kd measurement.Data showed that the Li＋extraction/insertion be governed mainly by ion-exchange mechanism.Remarkably,the Li_2Mn_（0.5）Ti_（0.5）O_3 samples which was leached Li＋by nitric acid showed an Li＋exchange capacity as large as 6.2 mmol/g.
出处
《化学试剂》
CAS
北大核心
2018年第2期176-178,182,共4页
Chemical Reagents
基金
国家自然科学基金资助项目(51541205)
