【摘要】 层状偏钛酸（H₂TiO₃,简称HTO）因具有高的理论吸/脱附容量（127.27 mg/g）、对环境友好和低成本等优点,被认为是最有发展前景的液相提锂用锂离子筛（LIS）。本文采用工业偏钛酸为原料制备了高性能锂离子筛,并对其进行造粒成型,有利于其工业化应用。利用X-ray粉末衍射仪、场发射扫描电子显微镜和火焰光度计对合成材料的晶体结构、颗粒形貌和吸附性能进行了表征,并对锂源、烧结温度、盐酸浓度、吸附pH值等进行了工艺优化。结果表明,用C₂H₃LiO₂·2H₂O作为锂源、工业偏钛酸为钛源合成的Li₂TiO₃（LTO）锂离子筛前驱体结构较为疏松多孔,酸洗之后的HTO锂离子筛平衡吸附容量较高（29.98 mg/g）,循环吸附五次后其容量几乎没有衰减。经造粒成条形后其平衡吸附容量（27.56 mg/g）与粉末状锂吸附剂接近,并显示出优异的循环性能,具有较大的工业化应用潜力。更多还原

【Abstract】 The layered metantitanic acid （H₂TiO₃,HTO） is considered to be the most promising lithium ion sieve （LIS） for lithium extraction from liquid due to its high theoretical adsorption/desorption capacity （127.27 mg/g）,environmental friendliness and low cost.Herein,high-performance lithium ion sieve was prepared using industrial metantitanic acid as raw material,followed by granulation,which was beneficial to its industrial application.The crystal structure,particle morphology and adsorption properties of the samples were characterized by X-ray powder diffractometer,field emission scanning electron microscope and flame photometer.The process conditions,such as Li source,sintering temperature,concentration of hydrochloric acid and pH value were optimized.The Li₂TiO₃（LTO） precursor,obtained using C₂H₃LiO₂·2H₂O as Li source,exhibited a porous structure.After HCl eluting,the corresponding HTO adsorbent manifested the highest equilibrium adsorption capacity （29.98 mg/g）,without obvious capacity attenuation after five cycles.After granulation,it delivered the Li⁺ uptake of 27.56 mg/g and excellent cycling performance,which is very close to that before granulation,representing a great potential for industrial application.更多还原