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以MnCl2·4H2O,LiOH·H2O等试剂为初始原料,采用溶胶-凝胶、水热处理、固化等软化学合成步骤制备了锂离子筛前驱体Li1.6Mn1.6O4,并经稀盐酸抽锂后得到了高选择性锂离子筛吸附剂MnO2·0.5H2O.着重对合成过程中锂锰比,氧化剂用量等因素影响进行了探讨,并对所制备吸附剂的吸附性能进行了研究.结果表明,经软化学合成步骤制备的锂离子筛对Li+有良好的吸附量和选择性,在未来从海水、卤水等液态锂资源富集或提取锂的应用中具有很大的潜力.
Lithium ion sieve precursor Li1.6Mn1.6O4 was prepared by sol-gel, hydrothermal treatment, solidification and other soft chemical synthesis steps using MnCl2 · 4H2O, LiOH · H2O and other reagents as raw materials, A high selective lithium ion sieve adsorbent, MnO2 · 0.5H2O, was discussed in detail, and the effects of factors such as the ratio of lithium to manganese and the amount of oxidizer during the synthesis process were discussed, and the adsorption properties of the prepared adsorbents were studied. Lithium ion sieves prepared by chemical synthesis steps have good adsorption capacity and selectivity for Li +, and have great potential in future application of enrichment or extraction of lithium from liquid lithium resources such as seawater and brine.