文献类型：期刊文献

英文题名：Unexpectedly efficient ion desorption of graphene-based materials

作者：Xia, Xinming[1,2,3,4];Zhou, Feng[5];Xu, Jing[2];Wang, Zhongteng[2];Lan, Jian[2];Fan, Yan[2];Wang, Zhikun[2];Liu, Wei[2];Chen, Junlang[2];Feng, Shangshen[2];Tu, Yusong[3,4];Yang, Yizhou[6];Chen, Liang[1];Fang, Haiping[6,7]

机构：[1]Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China;[2]Zhejiang A&F Univ, Coll Environm & Resource Sci, Dept Opt Engn, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Hangzhou 311300, Peoples R China;[3]Yangzhou Univ, Sch Phys Sci & Technol, Yangzhou 225009, Peoples R China;[4]Yangzhou Univ, Microelect Ind Res Inst, Yangzhou 225009, Jiangsu, Peoples R China;[5]Minist Environm Protect, Radiat Monitoring Tech Ctr, State Environm Protect Key Lab Radiat Monitoring, Key Lab Radiat Monitoring Zhejiang Prov, Hangzhou 310012, Zhejiang, Peoples R China;[6]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[7]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325000, Zhejiang, Peoples R China

年份：2022

卷号：13

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000888905100024)】；

基金：This work was supported by the National Natural Science Foundation of China (12074341, U1832150, 11875236, 11975206, 12075211, 11905186), the Fundamental Research Funds for the Provincial Universities of Zhejiang (2020TD001), the Scientific Research and Developed Fund of Zhejiang A&F University (No. 2017FR032), and the Scientific Research and Developed Funds of Ningbo University (No. ZX2022000015).

语种：英文

摘要：Ion desorption is extremely challenging for adsorbents with superior performance, and widely used conventional desorption methods involve high acid or base concentrations and large consumption of reagents. Here, we experimentally demonstrate the rapid and efficient desorption of ions on magnetite-graphene oxide (M-GO) by adding low amounts of Al3+. The corresponding concentration of Al3+ used is reduced by at least a factor 250 compared to conventional desorption method. The desorption rate reaches similar to 97.0% for the typical radioactive and bivalent ions Co2+, Mn2+, and Sr2+ within similar to 1 min. We achieve effective enrichment of radioactive Co-60 and reduce the volume of concentrated Co-60 solution by approximately 10 times compared to the initial solution. The M-GO can be recycled and reused easily without compromising its adsorption efficiency and magnetic performance, based on the unique hydration anionic species of Al3+ under alkaline conditions. Density functional theory calculations show that the interaction of graphene with Al3+ is stronger than with divalent ions, and that the adsorption probability of Al3+ is superior than that of Co2+, Mn2+, and Sr2+ ions. This suggests that the proposed method could be used to enrich a wider range of ions in the fields of energy, biology, environmental technology, and materials science.