Capture of iodine in solution and vapor phases by newly synthesized and characterized encapsulated Cu2O nanoparticles into the TMU-17-NH2 MOF

Mahtab Yadollahi; Hosein Hamadi; Valiollah Nobakht

doi:10.1016/j.jhazmat.2020.122872

Capture of iodine in solution and vapor phases by newly synthesized and characterized encapsulated Cu₂O nanoparticles into the TMU-17-NH₂ MOF

J Hazard Mater. 2020 Nov 15:399:122872. doi: 10.1016/j.jhazmat.2020.122872. Epub 2020 May 17.

Authors

Mahtab Yadollahi¹, Hosein Hamadi², Valiollah Nobakht¹

Affiliations

¹ Department of Chemistry, Faculty of Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
² Department of Chemistry, Faculty of Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran. Electronic address: h.hammadi@scu.ac.ir.

PMID: 32521316
DOI: 10.1016/j.jhazmat.2020.122872

Abstract

The efficient capture and storage of radioactive iodine (¹²⁹I or ¹³¹I) formed during the extensive use of nuclear energy is of paramount importance. Therefore, it is a great deal to design new adsorbents for effectively disposing of iodine from nuclear waste. In this work, a new Cu₂O/TMU-17-NH₂ composite has been prepared by a simple encapsulation of Cu₂O nanoparticles (NPs) into the metal organic framework (MOF) TMU-17-NH₂ for the first time. The as-synthesized Cu₂O/TMU-17-NH₂ was fully characterized in details and the iodine sorption/release capability of the Cu₂O/TMU-17-NH₂ composite has been investigated both in solution and in the vapor phase. According to the FE-SEM images, the Cu₂O/TMU-17-NH₂ was obtained with same morphology to that of the pristine TMU-17-NH₂. The I₂ sorption/release experiments were examined by UV-vis spectroscopy. The optimal iodine sorption was obtained by almost complete removal of iodine with a sorption capacity of about 567 mg/g. Detailed experimental evidence demonstrating that the iodine was captured by chemisorption process. Furthermore, photoluminescence (PL) properties of Cu₂O/TMU-17-NH₂ have also been investigated in which indicate that the Cu₂O/TMU-17-NH₂ composite exhibits stronger emission than the pristine TMU-17-NH₂.

Keywords: Cu(2)O; Iodine capture; MOF; Nanocomposite; Photoluminescence.