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Preparation and characterization of lithium λ-MnO2 ion-sieves |
Chang WANG1,*( ),Yanlong ZHAI2,Xi WANG1,Ming ZENG1 |
1. College of Marine Science & Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
2. College of Material Science & Chemical Engineering, Tianjin University of Science & Technology, Tianjin 300457, China |
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Abstract Lithium λ-MnO2 ion-sieves were prepared from spinel LiMn2O4 via treatment with nitric acid. The LiMn2O4 was synthesized by a solid state reaction between LiOH·H2O and MnO2. The effects of the calcination time and temperature on the preparation of the LiMn2O4 precursor and the lithium ion-sieve were investigated. In addition, the Li+ extraction ratio, the Mn2+ dissolving ratio and the adsorption properties of the lithium ion-sieve were all measured. The lithium ion-sieve had a high exchange capacity and was selective for Li+. Specifically, at pH= 13, the ion exchange capacity of Li+ was 30.9 mg/g in 10 mmol/L LiCl solution and the lithium extraction ratio and manganese dissolving ratio were 95% and 25%, respectively.
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| Keywords
lithium ion-sieve
solid state reaction
adsorption
LiMn2O4
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Corresponding Author(s):
Chang WANG
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Online First Date: 11 December 2014
Issue Date: 14 January 2015
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