Tunable rare-earth metal-organic frameworks for ultra-high selenite capture

Bingbing Guo; Hongyan Liu; Jia Pang; Qiang Lyu; Yutong Wang; Weidong Fan; Xiaoqing Lu; Daofeng Sun

doi:10.1016/j.jhazmat.2022.129094

Tunable rare-earth metal-organic frameworks for ultra-high selenite capture

J Hazard Mater. 2022 Aug 15:436:129094. doi: 10.1016/j.jhazmat.2022.129094. Epub 2022 May 10.

Authors

Bingbing Guo¹, Hongyan Liu¹, Jia Pang¹, Qiang Lyu¹, Yutong Wang¹, Weidong Fan², Xiaoqing Lu¹, Daofeng Sun¹

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China.
² State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China. Electronic address: wdfan@upc.edu.cn.

PMID: 35567811
DOI: 10.1016/j.jhazmat.2022.129094

Abstract

Linkers and clusters with various conformations present challenges for the design and prediction of highly porous and stable rare-earth metal-organic frameworks (RE-MOFs) for trapping toxic ions in aqueous solutions. Herein, we designed and synthesized a series of RE-MOFs based on a malleable ligand to explore the effects of ligands, clusters, and configurations on structural stability. The results showed that the nonanuclear high-connected UPC-183 exhibited better stability than the hexanuclear low-connected RE-MOF (UPC-181/182 series). Due to the syngenetic effect of chemi- and physisorption, the adsorption capacity of UPC-183-Eu for selenite (SeO₃^2-) is as high as 308.39 mg/g, recorded one of the highest ever reported for MOFs. Furthermore, we accurately analyzed the adsorption site of UPC-183-Eu for SeO₃^2- through single-crystal structure and theoretical simulation. The ultra-high selenite adsorption capacity and removal efficiency endow UPC-183-Eu an excellent porous adsorbent for removing pollutants.

Keywords: Nuclear regulation; Rare-earth metal-organic frameworks; Selenite capture; Single-crystal structure; Stability.