Microwave assisted hydrothermal synthesis of MnO2·0.5H2O ion-sieve for lithium ion selective adsorption
SEPARATION SCIENCE AND TECHNOLOGY(2016)
摘要
Li1.6Mn1.6O4 (LMO) synthesized by microwave assisted hydrothermal method were used to obtain MnO2 center dot 0.5H(2)O ion sieves (HMO) after acid treatment. The HMO-1 prepared with a Li/Mn molar ratio of 4, at 100oC for 1 h under microwave irradiation, exhibits an effective Li+ adsorption capacity of 5.6 mmol center dot g(-1) and a high selectivity to Li+ with an equilibrium distribution coefficient of 12366.44 mL center dot g(-1). Moreover, it shows almost saturated ion-exchange capacity (> 95%) for Li+ extracted/inserted process. Thus HMO ion-sieves with high adsorption capacity and selectivity to Li+ are expected to be a promising application for Li+ selective adsorption from brine, seawater, and aqueous lithium generated in industries.
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关键词
Microwave irradiation,Li1.6Mn1.6O4 precursors,lithium ion-sieve,lithium ion adsorption
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