纳米片多面体锰基锂离子筛的制备及锂离子吸脱附特性

doi:10.19964/j.issn.1006-4990.2021-0646

Abstract

Abstract:

Aiming at the problems of insufficient capacity and short service life for manganese?based lithium ion sieve，electrolytic manganese dioxide，lithium chloride and anhydrous aluminum chloride were used as raw materials to prepare Al-doped manganese?based lithium ion sieve precursor through hydrothermal method.The manganese?based lithium ion sieve H_1.6（Mn_1-_x Al _x ）_1.6O₄ was obtained after acid extraction of Li⁺.SEM results indicated that a uniform and smooth nanosheet polyhedron morphology was obtained for the Al doped specimen.BET analysis further showed that the specific surface area was increased significantly.The results of the Li⁺ adsorption and desorption performance showed that Li_1.6（Mn_0.7Al_0.3）_1.6O₄owned the best property.The equilibrium adsorption capacity was 32.32 mg/L when the initial concentration for Li⁺ solution was 80 mg/L，and after 5 cycles，the Li⁺ adsorption capacity could be maintained at 95% of the initial adsorption capacity.These results showed that with good crystallinity and large specific surface area，the nano?flake polyhedral manganese based lithium ion sieve possessed large adsorption capacity and good structure stability，which could provide a technical reference in the exploitation and process improvement of extracting lithium resources form salt?lake brine.

Key words: nano-flake polyhedral, Al-doped, manganese based lithium ion sieve, stability

CLC Number:

TQ131.11

HAN Hongjing,WU Yongmin,CAO Yongsheng,HAN Tingting,TANG Weiping. Preparation of nano?flake polyhedral manganese based lithium ion sieve and its adsorption and desorption characteristic for Li⁺[J]. Inorganic Chemicals Industry, 2022, 54(8): 59-65.

Figures/Tables 7

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Preparation of nano?flake polyhedral manganese based lithium ion sieve and its adsorption and desorption characteristic for Li⁺

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Preparation of nano?flake polyhedral manganese based lithium ion sieve and its adsorption and desorption characteristic for Li+