High-Crystallinity Titanium Lithium Ion Sieve and Granulated Composite of High Stability and Porosity: Superb Adsorption and Recycling Performance

Hao, Ya-Jing; Wang, Yi-Di; Wang, Ye; Guo, Xiao-Jing; Yan, Xi; Chen, Yan; Zhang, Xuan; Lang, Wan-Zhong

doi:10.1021/acs.iecr.3c03744

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…Currently, the methods for the lithium extraction from liquid resources are mainly based on the solvent extraction, precipitation, membrane separation, electrochemistry, and adsorption methods. , The adsorption method is considered a low-cost, nonpolluting, effective, and selective method for the lithium extraction from brines. So far, the adsorbents used for the lithium extraction are mainly classified as aluminum-based adsorbents, , lithium–titanium oxides , (LTO, Li 2 TiO 3 and Li 4 Ti 5 O 12 ), and lithium–manganese oxides − (LMO, LiMn 2 O 4 , Li 4 Mn 5 O 12 , and Li 1.6 Mn 1.6 O 4 ). Aluminum-based adsorbents have a high selectivity for Li + ions, while their lithium adsorption capacity is relatively poor.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Lithium Adsorption on an Anion- and Cation-Codoped Lithium Manganese Oxide Ion Sieve with a Thin Fluoride-Protective Coating Layer

Wang,

Gao,

Gao

et al. 2024

Ind. Eng. Chem. Res.

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In this work, novel lithium manganese oxide ion sieves (LISs) H 1.6 Mn 1.54 Al 0.02 Cr 0.04 F y O 4−y codoped with Al, Cr, and F ions were synthesized to improve their lithium adsorption performance. The resulting anion-and cation-codoped LISs maintain the spinel structure. Particularly, the introduction of F ions forms a fluoride coating layer on the surface of LISs, playing an important role in stabilizing the LIS structure. Moreover, some Mn 3+ ions are partially replaced by Al 3+ and Cr 3+ ions and some of the surface O 2− ions are replaced by F − ions, forming the stronger Al−O, Cr−O, and metal−fluorine bonds. The synergistic effect of the anion and cation codoping enhances the structural stability of LIS. Compared with undoped and double-doped LISs, the triple-doped LIS H 1.6 Mn 1.54 Al 0.02 Cr 0.04 F 0.1 O 3.9 (HMACFO-10) exhibits a lower manganese dissolution loss, enhanced Li + adsorption performance, and better reusability. In addition, HMACFO-10 affords good adsorption selectivity for Li + ions from brines.

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