文献类型：期刊文献

中文题名：TiO2离子筛的合成及锂吸附性能研究

英文题名：Preparation and lithium adsorption of titania ion-sieves

作者：李骁龙[1];李少鹏[1];张钦辉[1];于建国[1]

机构：[1]华东理工大学化工学院,化学工程联合国家重点实验室,上海200237

年份：2009

卷号：40

期号：8

起止页码：1338

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;EI(收录号：20093812326602);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(20576031,20706014);上海市科委纳米专项资助项目(0852nm02100)

语种：中文

中文关键词：二氧化钛;离子筛;锂;吸附;卤水

外文关键词：TiO2; ion-sieve; lithium; adsorption; brine

摘要：以离子筛型氧化物为关键材料的锂离子选择性吸附技术是近年来盐湖卤水提锂的重要研究方向。采用商品TiO2经过研磨、焙烧浸锂、酸洗脱锂和干燥过程制备得到立方晶相尖晶石结构的TiO2离子筛,通过XRD和SEM对样品晶相结构和表面形貌进行了表征,探索了焙烧温度和Li/Ti比对离子筛前驱体结构的影响,进一步对Li+吸附性能进行了研究。结果表明,当Li/Ti摩尔比为0.9,TiO2和Li2CO3在1173K焙烧24h后得到了近乎为纯晶相的尖晶石结构Li4Ti5O12前驱体,经酸脱锂后得到对Li+具有记忆效应的TiO2离子筛,对Li+的平衡吸附量为2.530mmol/g。
The inorganic oxide ion-sieves are important for the selective adsorption of lithium ions from brine or seawater. In this paper, spinel titania ion-sieves were prepared by the high-temperature solid-phase reaction between commercial TiO2 and Li2CO3. The crystalline structure, surface morphology and lithium ion adsorption capacity of the samples were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM） and adsorption kinetics measurement. The results showed that almost pure cubic phase Li4Ti5O12 precursor could be synthesized at Li/Ti molar ratio of 0.9 and calcination for 24h at 1173K. After acid treatment process to extract lithium ions from the Li-Ti-O lattice, the titania ion-sieves were prepared and the equilibrium adsorption amount is 2.530mmol/g.