Uncovering fantastic synergistic lithium adsorption with manganese-titanium based composite nanospheres:Mild synthesis and molecular dynamics simulation insights  

作　　者：Yameng Wang Zi-Yu Liu Yubei Su Yu Liu Aoqun Liu Xiaoye Zhang Yugang Huang Liyun Zhang Haisheng Chen Wancheng Zhu 

机构地区：[1]Department of Chemical Engineering,Qufu Normal University,Qufu 273165,Shandong,China [2]Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China [3]State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Journal of Energy Chemistry》2025年第2期52-67,I0003,共17页能源化学(英文版)

基　　金：supported by the National Natural Science Foundation of China(22075304,22378390);Natural Science Foundation of Shandong Province,China(ZR2022MB075);State Key Laboratory of Organic-Inorganic Composites(oic-202401016);State Key Laboratory of Chemical Engineering(SKL-ChE-24A02);Beijing Natural Science Foundation,China(3222050).

摘　　要：In light of the burgeoning energy technology sector and the ever-growing demand for lithium across diverse industrial domains,conventional lithium extraction methods have been proven inadequate due to their limited production capacity and high operational costs.This work introduces a novel approach to the manganese-titanium based composite HMTO(Mn:Ti=1:4)lithium ion-sieve(LIS)nanospheres,employing lithium acetate dihydrate,manganese carbonate and titanium dioxide P25 as the primary materials.These nanospheres exhibit relatively uniform spherical morphology,narrow size distribution,small average particle size(ca.55 nm),large specific surface area(43.58 m^(2)g^(-1))and high surface O_(2)-content(59.01%).When utilized as the adsorbents for Li^(+)ions,the HMTO(Mn:Ti=1:4)LIS demonstrates a fast adsorption rate,approaching equilibrium within 6.0 h with an equilibrium adsorption capacity(qe)of 79.5 mg g^(-1)and a maximum adsorption capacity(qm)of 87.26 mg g^(-1)(initial concentration CO:1.8 g L^(-1)).In addition,the HMTO(Mn:Ti=1:4)also delivers a high lithium extraction from the simulated high magnesium-lithium molar ratio salt lake brine(Mg:Li=103),achieving a qeof 33.85 mg g^(-1)along with a remarkable selectivity(α_(Mg)^(Li)=2192.76).Particularly,the HMTO(Mn:Ti=1:4)LIS showcases a satisfactory recycling adsorption performance.The adsorption capacity remains at a high level,even that determined after the 5th cycle(55.45 mg g^(-1))surpasses that of the most recently reported adsorbents.Ultimately,the fantastic synergistic lithium adsorption mechanism is deliberately uncovered by leveraging the ion exchange principles and molecular dynamics(MD)simulations.

关 键 词：Lithium ion-sieves Manganese titanium composite Adsorption performance lon exchange Salt lake brine lithium extraction 

分 类 号：TS396.5[轻工技术与工程] O647.3[理学—物理化学] TB383.1[理学—化学]