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The development of practical techniques for trapping radioactive iodine (I2) is crucial to the safe development of nuclear power. Herein, we reported a functionalized porous metal–organic framework (MOF), Zn3(ABTC)1.5(4-Hpich)(H2O)3·10H2O (Zn-ABTC) (H4ABTC = 2,2′,5,5′-azobenzenetetracarboxylic acid, 4-Hpcih = 4-pyridinecarbaldehyde isonicotinoyl hydrazone), with azo double and amide groups. The adsorption experiments showed that Zn-ABTC exhibited excellent adsorption capacity for volatile I2 (2.02 g g–1) and I2 cyclohexane solution (526 mg g–1) due to the introduction of nitrogen and oxygen active sites into the framework. Furthermore, Zn-ABTC has excellent recoverability and stability, retaining its adsorption capacity, even after five cycles. The spectroscopic analysis revealed the multiple interactions between the I2 molecules and azo double as well as amide groups. This work provides a rational strategy for constructing functional MOF materials for I2 adsorption.
Suo et al. (Fri,) studied this question.