【摘 要】
：
In this paper,a lithium-ion sieve(LIS)with different morphologies,such as rod-like(LIS-R),spherical(LIS-S),flower-like(LIS-F),and three-dimensional macroporous-
【机 构】
：
Chemistry and Chemical Engineering,Key Laboratory for Green Process of Chemical Engineering of Xinji
论文部分内容阅读
In this paper,a lithium-ion sieve(LIS)with different morphologies,such as rod-like(LIS-R),spherical(LIS-S),flower-like(LIS-F),and three-dimensional macroporous-mesoporous(LIS-3D),was prepared by hydrothermal synthesis,solid reaction,and hard-template synthesis.The results showed that the LIS with different morphol-ogies presented great differences in specific surface area,pore volume,adsorption selectivity,and structure sta-bility.LIS-3D with highest specific surface area and pore volume displayed the maximum adsorption capacity and adsorption rate,but the stability of LIS-3D was poor because of the manganese dissolution.By comparison,LIS-S has the best structural stability while maintaining a satisfactory adsorption capacity(35.02 mg·g-1)and adsorp-tion rate.The LIS-S remained about 90％of the original adsorption capacity after five cycles of adsorption-desorp-tion process.In addition,in the simulated brine system(the magnesium to lithium ratio of 400),the LIS-S exhibited the highest selectivity(αMgLi)of425.14.In sum,the LIS-S with good morphology is a potential adsorbent for lithium extraction from brine.
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