Two-dimensional copper-based metal-organic frameworks nano-sheets composites: One-step synthesis and highly efficient U(VI) immobilization

Shengxia Duan; Lishun Wu; Jiaxing Li; Yongshun Huang; Xiaoli Tan; Tao Wen; Tasawar Hayat; Ahmed Alsaedi; Xiangke Wang

doi:10.1016/j.jhazmat.2019.03.119

Two-dimensional copper-based metal-organic frameworks nano-sheets composites: One-step synthesis and highly efficient U(VI) immobilization

J Hazard Mater. 2019 Jul 5:373:580-590. doi: 10.1016/j.jhazmat.2019.03.119. Epub 2019 Mar 28.

Authors

Shengxia Duan¹, Lishun Wu², Jiaxing Li³, Yongshun Huang⁴, Xiaoli Tan⁵, Tao Wen⁵, Tasawar Hayat⁶, Ahmed Alsaedi⁶, Xiangke Wang⁷

Affiliations

¹ Department of Chemistry and Engineering, Heze University, Heze 274500, PR China; CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China.
² Department of Chemistry and Engineering, Heze University, Heze 274500, PR China.
³ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China; NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, PR China. Electronic address: lijx@ipp.ac.cn.
⁴ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China.
⁵ CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China.
⁶ NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
⁷ School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China; NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia. Electronic address: xkwang@ncepu.edu.cn.

PMID: 30952003
DOI: 10.1016/j.jhazmat.2019.03.119

Abstract

In this study, a new kind of thin 2D MOFs nano-sheets (MNS) was successfully prepared through complexation between 2-methylimidazole and Cu(II) by a one-step, and cost-effective route. The structural morphologies can be tuned by adjusting the ratio of MeOH/H₂O. The synthesized MNS (MNS-1, MNS-2, MNS-3 and MNS-4) were fully characterized and the results indicated that the synthesized MNS were freestanding and possess micro-sized lateral dimensions and nanoscale thickness of sub-25 nm. All the obtained MNS display great performance with the adsorption capacity hierarchy of MNS-2 (591.79 mg·g^-1) > MNS-3 (409.49 mg·g^-1) > MNS-4 (387.07 mg·g^-1) > MNS-1 (384.84 mg·g^-1) at pH ˜ 6.0, and 298 K. The thermodynamic parameters indicated the exothermic and spontaneous nature of U(VI) immobilization. The U(VI) immobilization mechanism was achieved through the complexation between U(VI) and C-N(H) /-OH groups. This work supplies a facile and purposeful approach for developing 2D MOFs nano-sheets toward a highly efficient immobilization of U(VI), and it also promotes the preparation of structure-based design of nanomaterials for radionuclide-containing-medium pretreatment.

Keywords: 2D MOFs nano-sheets; Immobilization; Immobilization mechanism; One-step synthesis; U(VI).

Publication types

Research Support, Non-U.S. Gov't