2D vertical heterostructure membranes for lanthanide separation

Jing Liang; Tianqi Liu; Yifan Li; Wenbin Liang; Xin Zhang; Lijuan Qian; Zhan Li; Ximeng Chen

Cell Reports Physical Science (Mar 2022)

2D vertical heterostructure membranes for lanthanide separation

Jing Liang,
Tianqi Liu,
Yifan Li,
Wenbin Liang,
Xin Zhang,
Lijuan Qian,
Zhan Li,
Ximeng Chen

Affiliations

Jing Liang: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
Tianqi Liu: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China
Yifan Li: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China
Wenbin Liang: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China
Xin Zhang: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Corresponding author
Lijuan Qian: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
Zhan Li: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Corresponding author
Ximeng Chen: Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China; Institute of National Nuclear Industry, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

Journal volume & issue: Vol. 3, no. 3
p. 100769

Abstract

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Summary: The design and synthesis of separation materials for lanthanides with extremely similar properties have always been a significant challenge. Here, a two-dimensional (2D) metal–organic framework (MOF) with crystal faces similar to the [002] of ZIF-8, which theory suggests should not be stable, is predicted and synthesized by solvent evaporation between graphene layers to prepare a 2D vertical heterostructure membrane. Theoretically, the pristine cluster of 2D MOFs contains one small and 1/4 large crown pores, and the small pores can selectively adsorb lanthanide elements, causing the selective penetration of lanthanide ions. Experimentally, the selectivity of lanthanide is obtained through the membrane with La3+/Yb3+ ≈55.79 and La3+/Ce3+ ≈6.02. The interlayer entrapment of graphene stabilizes the structure of the 2D MOF, and the intercalation of the 2D MOF expands and fixes the interlayer spacing of graphene oxide, improving the stability in strong acids, the selectivity, and the ion transmittance of the membrane.

Published in Cell Reports Physical Science

ISSN: 2666-3864 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Physics
Website: https://www.cell.com/cell-reports-physical-science

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