Abstract
Developing a green and safe reversible iodine capture material is key for nuclear waste treatment. Herein, we report a readily obtainable β-CD-based polymer network (CDPN) that can reversibly capture iodine. This white CDPN material is able to capture both gaseous iodine and liquid iodine, with a good iodine uptake capacity of 2.73 g/g. The I2 can be easily released from I2@CDPN by soaking it in methanol, achieving nearly complete release within 1 min. The CDPN powder exhibits good recyclability in its iodine capture performance. The efficient iodine capture ability of CDPN is ascribed to the cyclodextrin cavity and the crosslinked polymer network, which enhance the interactions between the host (CDPN) and guest (iodine) molecules, both intermolecularly and intramolecularly.
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