Zn, O Co-adsorption based on MOF-5 for efficient capture of radioactive iodine

Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

“…For example, nuclear waste disposal will produce a series of volatile radioactive substances. Among these radioactive elements, element I 2 and organic iodide (CH 3 I) are released through radioactive gases during nuclear reactors’ operations. , Among them, the half-life of 129 I is exceptionally long, as long as 1.57 × 10 7 years, , which causes pollution to the environment and, at the same time, damages the thyroid and interferes with the metabolism of the human body. − Therefore, it is essential to effectively capture volatile radioactive iodine substances from the exhaust gases of nuclear power plants.…”

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

“…As illustrated in Figure a, Zn-MOF-1, and Zn-MOF-2 demonstrated notable iodine adsorption capacities, with maximum adsorption amounts of 1.25 and 1.96 g g –1 , respectively. Notably, these values were significantly higher compared than most other reported common adsorbents and Zn-MOF materials under similar adsorption conditions (Figures b and S3), ,,− The larger specific surface area of Zn-MOF-2 may contribute to its superior performance in iodine absorption compared to Zn-MOF-1. The π-conjugated electron clouds in both Zn-MOFs were conducive to trapping volatile iodine.…”

“…Metal–organic frameworks (MOFs) have various applications such as gas storage, separation, and catalysis. − In the past time, various MOFs had been used to study iodine capture, , such as Cu-BTC, MIL-53 series (Al), MIL-101 (Al), MOF-74, JNU-200 (Co), Zr-MOFs, ZIF-8, and Cd-MOF . Further research was needed to explore MOFs with higher adsorption capacity, selectivity, stability, and low cost.…”

Construction of zirconium/hafnium-oxo clusters based on a new protection-calix[8]arene

“…The calculation results indicated that the d-orbital of Zr is more involved in the interaction with I 2 , promoting its charge transfer with iodine. 38,39…”

“…The calculation results indicated that the d-orbital of Zr is more involved in the interaction with I 2 , promoting its charge transfer with iodine. 38,39 By analyzing DFT calculations and previous works, we inferred that the main driving force for Zr 4 and Hf 4 crystals that helped iodine absorption is various non-covalent interactions, including hydrogen bonds, halogen bonds, anion⋯π and electrostatic interactions. 40,41 The existence of Cl − ions and abundant benzene rings enable the I 2 molecule to be adsorbed through I-I⋯Cl halogen bond, C-H⋯I hydrogen bond, and I-I⋯π electrostatic interaction of polyiodide and framework, while Zr 4 exhibits a faster adsorption rate and slower release rate than Hf 4 during the experiment, which is due to I 2 and Zr metal centers having stronger interactions than the Hf metal centers.…”