Development and Adsorption Properties for a Novel Lithium Ion-Sieve

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The lithium ion-sieve precursor was prepared with LiOH and Mn (CH3COO)2 as the starting reagents, H2O2 as the oxidant and ethanol solution (volume percent 2.5%) as solution by combination of sol-gel, hydrothermal and low-temperature solid state methods, and then changed into lithium ion-sieve after eluting Li+ by the mixture of HCl and Na2S2O8 solution. The influence of synthetic conditions on the structures and adsorption properties of lithium ion-sieve was investigated in detail. The results suggest that the pure phase lithium ion-sieve can be synthesized when Li/Mn molar ratio is 3/1, 3.2mL H2O2 is added after LiOH and Mn (CH3COO)2 react for 36h and the heat treatment way of programmed temperature from 410°C (2h) to 510°C (3h) is adopted in the progress of solid state reaction. The loss rate of dissolved Mn is less than 2.5% during pickling Li+. And the highest adsorption capacity can achieve 20.5mg/g.

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691-697

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April 2016

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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