文献类型：期刊文献

英文题名：Macroporous Lithium Adsorbent Monolith Prepared via High Internal Phase Emulsion Technique

作者：Zhang, Shengmiao[1];Zhou, Pan[1];Zhu, Wenxiao[1];Zhu, Yun[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：2

期号：7

起止页码：2563

外文期刊名：ACS APPLIED POLYMER MATERIALS

收录：;EI(收录号：20213210728532);WOS:【SCI-EXPANDED(收录号:WOS:000552638400009)】；

基金：This work was supported by the National Natural Science Fund of China (51773059), the Natural Science Foundation of Shanghai (16ZR1407800), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：high internal phase emulsion; lithium-ion sieves; polymeric foam; Pickering emulsion; polyHIPE

摘要：A facile strategy to fabricate macroporous polymeric loam composites with uniformly distributed lithium-ion sieves (LIS) was fabricated toward lithium ion (Li+) selective recovery. With LiMn2O4 nanoparticles as stabilizers, oil-in-water (o/w) high internal phase emulsions (HIPEs) were prepared, and then a series of porous hydrophilic materials containing LIS (LNP@polyHIPEs) was obtained by the polymerization of water-soluble monomers in the Pickering HIPEs and followed by acid pickling. Lithium-ion adsorption was conducted by flowing lab made seawater through a LIS@polyHIPEs monolith. The LIS@polyHIPE exhibited a high adsorption capacity (similar to 35.6 mg/g (LiMn2O4)) and fast adsorption kinetics (the equilibrium time was similar to 3.0 h). The kinetics data and fitting them by a pseudo-first-order model showed that the loading of LIS onto polyHIPE had little influence on the adsorption rate, and the uptake of Li+ onto LIS@polyHIPE was an ion exchange or chemical adsorption control process. After the Li+ was extracted by washing the foam with a 0.5 mol/L HCl aqueous solution, the LIS@polyHIPE could be reused for recovery of Li+ from seawater. Its adsorption capacity and Li+ extraction rate were more than 31 mg/g (LiMn2O4) and 90% in four cycles, respectively.