Enhancing adsorption capacity and structural stability of Li1.6Mn1.6O4 adsorbents by anion/cation co-doping

Su, Yifan; Qian, Fangren; Qian, Zhiqiang

doi:10.1039/d1ra07720a

Cited by 13 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ion-sieved adsorbents have abundant imprinted cavities, which are formed by stripping Li + sites with H + , thus possessing high selectivity to capture Li + from solutions. Despite many successes in developing lithium adsorbents these years, ,,− there is still a serious “Achilles heel” hindering the practical performance. It is that the ion-sieve adsorbents can only efficiently work in harsh alkali conditions (pH ∼ 11) but are unable to effectively bind with lithium in the natural pH condition of seawater and salt lakes (near neutrality), , which is thus challenged by large alkali consumption and complicated operation processes.…”

Section: Introductionmentioning

confidence: 99%

Microenvironment-Modulating Adsorption Enables Highly Efficient Lithium Extraction under Natural pH Conditions

Han,

Ma,

Liu

et al. 2024

ACS Nano

View full text Add to dashboard Cite

Ion-sieve adsorbents are effective materials in practical applications for extracting liquid lithium. However, it is greatly suppressed in adsorption capacity and selectivity (Li/Mg) under natural near-neutral conditions of seawater or salt lakes, due to the interference of in situ released H + and Mg 2+ impurity. This paper proposes an adsorbent with a microenvironment-modulating function as a solution. The introduction of quaternary ammonium groups into the carrier accelerates the migration of H + , while preventing the diffusion of Mg 2+ by electrostatic repulsion. Besides, it can also prestore OH − , effectively consuming the generated hydrogen ions in situ. Based on the rational design, the alkali consumption of the microenvironment-modulating strategy is dramatically reduced to 1/144 of the traditional alkali-adding method. Additionally, adsorption performance is significantly promoted under natural pH conditions, with a maximum 33 times higher separation factor (selectivity) and 4 times higher adsorption capacity than commercial ion-sieve adsorbents. This development indicates the feasibility of using microenvironment modulation for effective lithium extraction and inspires the development of next-generation highperformance adsorbents.

show abstract

Section: Introductionmentioning

confidence: 99%

Microenvironment-Modulating Adsorption Enables Highly Efficient Lithium Extraction under Natural pH Conditions

Han,

Ma,

Liu

et al. 2024

ACS Nano

View full text Add to dashboard Cite

show abstract

“…Since about 75% of lithium on land is stored in brine, lithium recovery from aqueous solutions has a significant advantage [7]. The main methods for lithium extraction from solution include evaporation and precipitation, solvent extraction, adsorption, and membrane separation [8][9][10][11][12][13]. Among them, the adsorption method has the advantages of high selectivity and simple operation, which is a promising method [14].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of lithium ions from aqueous solution by magnetic aluminum-based adsorbents

Qin,

Yang,

Shi

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

Magnetic aluminum-based adsorbents (MLDHs) were prepared with a coprecipitation method and used to separate lithium ions from the aqueous solutions. In static adsorption experiment, the adsorption capacity of MLDHs for lithium ions reached 8.22 mg/g. In a mixed solution of various metal ions, the adsorbents exhibited higher selectivity for lithium ions. Kinetic studies indicated that the adsorption process conformed to a pseudo-second-order model. The experimental data were fitted with nonlinear regression using commonly used adsorption isotherms. It was found that the adsorption isotherm process could be described by the Langmuir model. In addition, the thermodynamic parameters revealed that the adsorption of lithium was a spontaneous endothermic process.

show abstract

Al and F ions co-modified Li1.6Mn1.6O4 with obviously enhanced Li+ adsorption performances

Zhang

Hai

Zhou

et al. 2022

Chemical Engineering Journal

View full text Add to dashboard Cite

Enhancing adsorption capacity and structural stability of Li_1.6Mn_1.6O₄ adsorbents by anion/cation co-doping

Abstract: Modifying the structure of Li1.6Mn1.6O4 (LMO) to enhance its structural stability and adsorption capacity is an effective method to generate materials to recover Li+ ions from mixed solution.

Cited by 13 publications

References 32 publications

Microenvironment-Modulating Adsorption Enables Highly Efficient Lithium Extraction under Natural pH Conditions

Microenvironment-Modulating Adsorption Enables Highly Efficient Lithium Extraction under Natural pH Conditions

Adsorption of lithium ions from aqueous solution by magnetic aluminum-based adsorbents

Al and F ions co-modified Li1.6Mn1.6O4 with obviously enhanced Li+ adsorption performances

Contact Info

Product

Resources

About