In-situ self-assemblied HTO/MXene/PSF hybrid membrane for high efficiency and selective lithium extraction from shale gas wastewater  

作　　者：Yuchun Ren Dandan Zhao Fei Zhou Chen Fu Yongsheng Fu Zhenglian Wu Ying Luo Feng Sun Xun He Xuping Sun 

机构地区：[1]School of Environmental Science and Engineering,Southwest Jiaotong University,Chengdu 611756,China [2]College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Jinan 250014,China [3]Center for High Altitude Medicine,West China Hospital,Sichuan University,Chengdu 610041,China [4]Chengdu Pollution Source Monitoring Center,Chengdu 610066,China [5]Leshan Environmental Monitoring Center Station of Sichuan Province,Department of Ecology and Environment of Sichuan Province,Leshan 614000,China [6]State Key Laboratory of Space Power Sources,Shanghai Institute of Space Power Sources,Shanghai 200245,China [7]School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Nano Research》2025年第4期255-266,共12页纳米研究(英文版)

基　　金：supported by the Fundamental Research Funds for the Central Universities(No.2682024CX106);Yangtze River Ecological Environment Protection and Restoration(No.2022-LHYJ-02-0509-09);the Industry-University-Research Cooperation Fund of Shanghai Academy of Spaceflight Technology(No.USCAST2021-21).

摘　　要：H_(2)TiO_(3)(HTO)emerges as a highly promising lithium-ion sieve(LIS)material for selectively and efficiently extracting lithium from liquid-phase systems.However,the practical use of conventional powdered HTO adsorbents is hindered by difficulties in recovery and titanium leaching,which limits their reusability.Herein,we design a novel HTO/MXene/polysulfone(HTO/MXene/PSF)hybrid membrane,where two-dimensional(2D)MXene nanosheets bridge PSF and HTO via enhanced hydrogen bonding and enable the in-situ self-assembly of HTO into spindle-like nanostructures.As anticipated,the hybrid membrane exhibits selective lithium adsorption,achieving a capacity of 25.80 mg·g^(-1) from shale gas wastewater(SGW).Moreover,it maintains remarkable cyclic stability with a negligible decrease in adsorption capacity of merely 0.25% after ten consecutive adsorption-desorption cycles.Besides,filtration studies demonstrate that a membrane with a surface area of 12.56 cm^(2)can effectively process 230 mL of SGW.Theoretical calculations reveal that hydrogen bonding and electronic interactions drive the self-assembly of HTO on MXene and further elucidate the adsorption strength and spatial hindrance mechanisms for selective lithium ion adsorption.This study introduces an innovative concept of in-situ self-assembled LIS in a hybrid membrane for lithium recovery from SGW,which is expected to inspire further research on self-assembled sieve-based adsorbents.

关 键 词：lithium recovery shale gas wastewater self-assembled lithium-ion sieve H2TiO3/MXene hybrid membrane density functional theory 

分 类 号：X703[环境科学与工程—环境工程]