半包覆锰基复合锂离子筛的制备与吸附性能

doi:10.11896/cldb.23110239

材料导报

2025, Vol. 39

Issue (4): 23110239-7 https://doi.org/10.11896/cldb.23110239

无机非金属及其复合材料

半包覆锰基复合锂离子筛的制备与吸附性能

刘平¹, 王晨¹, 韩庆文², 苗攀¹, 马家玉^1,*

1 武汉工程大学化工与制药学院,武汉 430205
2 湖北三峡实验室,湖北宜昌 443000

Preparation and Adsorption Performance of Semi-coated Manganese-based Composite Lithium Ion-Sieve

LIU Ping¹, WANG Chen¹, HAN Qingwen², MIAO Pan¹, MA Jiayu^1,*

1 School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
2 Hubei Three Gorges Laboratory, Yichang 443000, Hubei, China

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摘要吸附法是提取液体锂资源的一个重要方法,其中锰基离子筛吸附剂具有很大的应用潜力。但锰基离子筛仍然存在制备方法复杂、Mn溶损率高等技术问题。本工作采用固相法制备了Li₄Mn₅O₁₂·Li₂MnO₃锰基复合前驱体,对合成的前驱体进行了XRD、SEM、TEM、XPS、热重、比表面积和孔径分析表征,研究了半包覆锰基复合锂离子筛对液体中Li⁺的吸附性能和循环稳定性。结果表明,Li₄Mn₅O₁₂与Li₂MnO₃以多相共生的方式结合,构建的半包覆结构增加了锂离子筛的稳定性。而半包覆锰基复合锂离子筛吸附Li⁺符合单分子层化学吸附,温度升高有利于吸附的进行。半包覆锰基复合锂离子筛的吸附容量为26.51 mg/g,五次循环后吸附容量仅损失3.82%,而未包覆的锂离子筛吸附容量损失高达12.6%。同时,五次循环后Mn溶损率仅为0.83%,明显低于未包覆锂离子筛(2.06%)。本工作制备的半包覆锰基复合锂离子筛有望用于液体锂资源的提取。

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关键词: 锰基复合锂离子筛半包覆结构 Mn溶损吸附性能

Abstract: The adsorption method is an important method for extracting liquid lithium resources, among which manganese-based ion-sieve adsorbent has great application potential. However, there are still some technical problems such as complex preparation methods and a high Mn dissolution loss rate. In this work, a composite precursor of Li₄Mn₅O₁₂·Li₂MnO₃ was prepared by solid-phase method. The synthesized precursor was analyzed and characterized by XRD, SEM, TEM, XPS, thermostats, specific surface area and pore size, and the adsorption performance and cycle stability of Li⁺ in liquid by the semi-coated Mn-based composite lithium ion-sieve were studied. The results showed that Li₄Mn₅O₁₂ and Li₂MnO₃ combine in polyphase symbiosis, and the semi-coated structure increases the stability of the lithium ion-sieve. The adsorption of Li⁺ by a semi-coated Mn-based composite lithium ion-sieve is chemical monolayer adsorption, and the increase in temperature is beneficial to the adsorption process. The adsorption capacity of the semi-coated Mn-based composite lithium ion-sieve is 26.51 mg/g, and the adsorption capacity loss is only 3.82% after five cycles, while that of the uncoated lithium ion-sieve is as high as 12.6%. Meanwhile, the Mn dissolution loss rate is only 0.83% after five cycles, which is significantly lower than that of the uncoated lithium ion-sieve (2.06%). The semi-coated Mn-based composite lithium ion-sieve prepared in this work is expected to be used for the extraction of liquid lithium resources.

Key words: Mn-based composite lithium ion-sieve semi-coated structure Mn dissolution loss adsorption performance

出版日期: 2025-02-25 发布日期: 2025-02-18

ZTFLH:

O647.3

基金资助: 国家重点研发计划“固废资源化”专项(2019YFC1905803);湖北省重点研发计划项目(2022BCA086);湖北三峡实验室创新基金(SC211016);武汉工程大学研究生教育创新基金(X2022022)

通讯作者: *马家玉,武汉工程大学化工与制药学院副教授、硕士研究生导师。目前主要从事磷化工、从低品位多金属矿及固体废物中提取有色金属(钾、铝、锂)的基础及应用基础研究工作。majiayu1982@126.com

作者简介: 刘平,现为武汉工程大学化工与制药学院硕士研究生,在马家玉副教授的指导下进行研究。目前主要研究领域为吸附材料合成与应用。

引用本文:

刘平, 王晨, 韩庆文, 苗攀, 马家玉. 半包覆锰基复合锂离子筛的制备与吸附性能[J]. 材料导报, 2025, 39(4): 23110239-7.
LIU Ping, WANG Chen, HAN Qingwen, MIAO Pan, MA Jiayu. Preparation and Adsorption Performance of Semi-coated Manganese-based Composite Lithium Ion-Sieve. Materials Reports, 2025, 39(4): 23110239-7.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.23110239 或 https://www.mater-rep.com/CN/Y2025/V39/I4/23110239

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