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3D-agaric like core-shell architecture UiO-66-NH2@ZIF-8 with robust stability for highly efficient REEs recovery
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.cej.2020.124023
Mengmeng Zhang , Kun Yang , Junshuo Cui , Haibiao Yu , Yuejiao Wang , Weijun Shan , Zhenning Lou , Ying Xiong

With the ever-increasing of Rare Earth Elements (REEs) in various high technology applications, efficient recovery of REEs from liquid sources is becoming significantly important. In this work, ZIF-8 and UiO-66-NH2 (U6N) are combined to form a 3D-agaric like core-shell structure hybrid material ([email protected]), which exhibits good performance in REEs extraction. Due to the abundant adsorption sites of ZIF-8 and the excellent water stability of UiO-66-NH2, 3D-agaric like [email protected] showed quick adsorption rate (only 10 min to reach equilibrium), high adsorption capacity and selectivity for REEs from water compared to other reported adsorbents. Maximum adsorption capacities of [email protected] for neodymium (Nd(III)), europium (Eu(III)), gadolinium (Gd(III)) and erbium (Er(III)) achieved to 249.90, 295.28, 316.22 and 340.95 mg g-1, respectively. [email protected] has superiority in selective adsorption of REEs from Cd(II), Zn(II), Cu(II), Mn(II) and Co(II) coexistence solution. The order of adsorption capacities for REEs is in agreement with the order of their electronegativity, ionic radius and charge density. Moreover, [email protected] showed better water stability and recyclability than single MOF. Overall, [email protected] hybrid material has efficiency in REEs separation from solutions, and has great advantage in the application of wastewater treating.



中文翻译:

类似于3D-agaric的核-壳架构UiO-66-NH 2 @ ZIF-8,具有稳定的稳定性,可实现高效的REEs恢复

随着各种高科技应用中稀土元素(REE)的不断增长,从液体源中有效回收REE变得尤为重要。在这项工作中,ZIF-8和UiO-66-NH 2(U6N)结合形成3D-琼脂状核壳结构混合材料([电子邮件保护]),在REEs提取中表现出良好的性能。由于ZIF-8具有丰富的吸附位和UiO-66-NH 2的优异水稳定性与其他报道的吸附剂相比,3D-agaric像[email protected]表现出快速的吸附速率(仅需10分钟即可达到平衡),高的吸附能力和对水中REE的选择性。[电子邮件保护]对钕(Nd(III)),euro(Eu(III)),g(Gd(III))和(Er(III))的最大吸附容量达到249.90、295.28、316.22和340.95 mg g -1, 分别。[电子邮件保护]在从Cd(II),Zn(II),Cu(II),Mn(II)和Co(II)共存溶液选择性吸附REE方面具有优势。稀土元素的吸附能力顺序与其电负性,离子半径和电荷密度的顺序一致。此外,[受电子邮件保护]显示出比单个MOF更好的水稳定性和可回收性。总的来说,[受电子邮件保护的]杂化材料具有从溶液中分离REE的效率,并且在废水处理的应用中具有很大的优势。

更新日期:2020-01-07
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