Preparation and evaluation of α-Al2O3 supported lithium ion sieve membranes for Li+ extraction

Feng Xue; Xiaoxian Zhang; Yue Niu; Chenhao Yi; Shengui Ju; Weihong Xing

doi:10.1016/j.cjche.2020.05.006

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Preparation and evaluation of α-Al₂O₃ supported lithium ion sieve membranes for Li⁺ extraction

Separation Science and Engineering | Updated：2026-01-06

- Preparation and evaluation of α-Al₂O₃ supported lithium ion sieve membranes for Li⁺ extraction
- Preparation and evaluation of α-Al₂O₃ supported lithium ion sieve membranes for Li⁺ extraction
- 中国化学工程学报（英文版） 2020年28卷第9期页码：2312-2318
- Affiliations：
  
  College of Chemical Engineering, Nanjing Tech University,Nanjing,China,211816
- Author bio：
- Funds：
  
  This work was financially supported by National Key Research and Development Program (2018YFE0203502), China;Primary Research and Development Plan of Jiangsu Province (BE2019117), China and National Students' Platform for Innovation and Entrepreneurship Training (201910291051Z), China.
- DOI：10.1016/j.cjche.2020.05.006
  中图分类号：
- 纸质出版：2020
- Accepted：
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Feng Xue, Xiaoxian Zhang, Yue Niu, 等. Preparation and evaluation of α-Al₂O₃ supported lithium ion sieve membranes for Li⁺ extraction[J]. 中国化学工程学报（英文版）, 2020,28(9):2312-2318. DOI: 10.1016/j.cjche.2020.05.006.

O
Feng Xue, Xiaoxian Zhang, Yue Niu, 等. Preparation and evaluation of α-Al₂O₃ supported lithium ion sieve membranes for Li⁺ extraction[J]. 中国化学工程学报（英文版）, 2020,28(9):2312-2318. DOI: 10.1016/j.cjche.2020.05.006. DOI：

O DOI： 10.1016/j.cjche.2020.05.006.

摘要

Abstract

Spinel lithium manganese oxide ion-sieves have been considered the most promising adsorbents to extract Li

from brines and sea water. Here

we report a lithium ion-sieve which was successfully loaded onto tubular α-Al

ceramic substrates by dipping crystallization and post-calcination method. The lithium manganese oxide Li

was first synthesized onto tubular α-Al

ceramic substrates as the ion-sieve precursor (

i.e

. L-AA)

and the corresponding lithium ion-sieve (

i.e

. H-AA) was obtained after acid pickling. The chemical and morphological properties of the ion-sieve were confirmed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Both L-AA and H-AA showed characteristic peaks of α-Al

and cubic phase Li

and the peaks representing cubic phase could still exist after pickling. The lithium manganese oxide Li

could be uniformly loaded not only on the surface of α-Al

substrates but also inside the pores. Moreover

we found that the equilibrium adsorption capacity of H-AA was 22.9 mg·g

-1

. After 12 h adsorption

the adsorption balance was reached. After 5 cycles of adsorption

the adsorption capacity of H-AA was 60.88% of the initial adsorption capacity. The process of H-AA adsorption for Li

correlated with pseudo-second order kinetic model and Langmuir model. Adsorption thermodynamic parameters regarding enthalpy (Δ

)

Gibbs free energy (Δ

) and entropy (Δ

) were calculated. For the dynamic adsorption- desorption process of H-AA

the H-AA exhibited excellent adsorption performance to Li

with the Li

dynamic adsorption capacity of 9.74 mg·g

-1

and the Mn

dissolution loss rate of 0.99%. After 3 dynamic adsorption-desorption cycles

80% of the initial dynamic adsorption capacity was still kept.

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