Architecting Polymeric Beads with Covalent Organic Framework Nanostrands for Fast and Selective Extraction of Neodymium

Zhipeng Zhang, Xiansong Shi, Zhe Zhang, Bingjie Gao, Lu Shao, Yong Wang

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摘要

Covalent organic frameworks (COFs) with regular and tailorable pore channels are promising for constructing advanced adsorbents for the recovery of rare earth ions. However, it remains a challenge to construct composite adsorbents comprising COFs with well-defined morphologies. This study describes a composite bead composed of a polyacrylonitrile matrix and a negatively charged COF, TpPa-SO3Na, possessing a strand-like morphology for the extraction of Nd3+ from aqueous solutions. Porous and crystalline TpPa-SO3Na nanostrands were synthesized under hydrothermal conditions and exhibited a high adsorption capacity (107.1 mg g-1), fast kinetics, and good selectivity during Nd3+ adsorption. TpPa-SO3Na nanostrands were further processed into composite beads with a high loading amount of 50%, and the resulting beads effectively maintained the original microstructures and properties of the nanostrands. Importantly, the composite beads can be used in a dynamic process and show excellent recovery efficiency under low or high Nd3+ concentrations as well as good operational stability. This work not only demonstrates an evident strategy for preparing composite beads by leveraging a polymer matrix and COF nanostrands but also highlights their great potential in the extraction of sparse precious metal resources, including but not limited to rare earth ions.

源语言英语
页(从-至)14777-14785
页数9
期刊Industrial and Engineering Chemistry Research
63
33
DOI
出版状态已出版 - 21 8月 2024

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