Facile fabrication of photochromic microspheres with multimodal hierarchically porous for selective extraction of lithium ions
Facile fabrication of photochromic microspheres with multimodal hierarchically porous for selective extraction of lithium ions
复制标题
轻松制造具有多峰分层多孔的光致变色微球，用于选择性提取锂离子
DOI：
10.1016/j.matlet.2020.127670
复制
发表时间：
2020
影响因子：
3
通讯作者：
Fangqin Cheng
中科院分区：
文献类型：
--
作者：
Enze Li;Peiyuan Ye;Jin Kang;Caixia Yin;Fangqin Cheng
高镁锂比盐湖卤水仍是锂回收的主要来源之一。本文采用简单的相转化法制备了一种具有多峰多孔结构的灵敏光致变色微球(SP-C/PVDF)。微球中的SP-C仍然保持稳定的活性，使SP-C/PVDF发生了稳定的可逆变色。在紫外光照射下，SP-C/PVDF微球对Li+表现出比对Mg2+更高的选择性吸附。准二级模型和化学单层等温线模型分别能描述Li+的吸附动力学和结合方式。本工作为盐湖卤水中痕量Li+的选择性萃取提供了一种可行的思路和方法，可为从复杂体系中分离其他有价值的离子提供参考。
Salt lake brine with a high Mg/Li ratio remains one of major sources for lithium recovery. In this work, one kind of sensitive photochromic microspheres (SP-C/PVDF) with multimodal hierarchically porous structure was prepared via a facile phase inversion method. The SP-C in the microspheres was still stable and active resulting in stable reversible color switch of SP-C/PVDF. The SP-C/PVDF microspheres presented high selective adsorption for Li+compared with that of Mg2+under UV light irradiation. The pseudo-second-order model and chemical monolayer isotherm model can describe the adsorption kinetics and binding way with Li+, respectively. This work developed an available idea and method for selective extraction of trace Li+from salt lake brine, which can provide references for the separation of other valuable ions from complex systems.