文献类型：期刊文献

英文题名：Sn2+doping-induced activation of inert adsorption sites in Li/Al-LDHs for selective lithium extraction from brines

作者：Zhang, Rui[1,2];Yan, Chenlu[1,2];Chen, Jun[1,2];Wei, Ting[3];Yu, Jianguo[1,2];Lin, Sen[1,4]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Salt Lake Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2026

卷号：533

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20261120254674);WOS:【SCI-EXPANDED(收录号:WOS:001715363700001)】；

基金：This work was sponsored by the National Natural Science Foundation of China (92475114, 22508122, 92475207) .

语种：英文

外文关键词：Doping engineering; Li/Al-LDHs; Structural modulation; Activation; Lithium extraction

摘要：Li/Al-LDHs are the preferred adsorbents for lithium extraction from salt lake brines due to their acid-free application and negligible dissolution loss, yet their constrained adsorption performance limits practical implementation. Herein, an effective Sn2+-doping strategy was developed and demonstrated to significantly enhance Li+ adsorption performance. The modified Sn/Li/Al-LDHs presented a stable 48.5% enhancement in Li+ adsorption capacity and a dramatic increase in selectivity (with coefficients rising from 7.02 to 14.81 to 19.76-90.00). Further, combined experimental and computational results revealed that the partial substitution of Sn2+ for Al3+ induced local charge redistribution and lattice distortion. This structural modulation promoted the formation of active and mesoporous LDH phases which improved Li+ affinity and transport pathway, thereby effectively reinforcing the overall lithium adsorption performance. This work provides a facile modification strategy to overcome the application limitations and advance efficient lithium extraction by Li/Al-LDHs from diverse salt lake resources.