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- W4294328691 abstract "Radio iodine is one of the essential gaseous pollutions needed to be removed by the growth in nuclear energy consumption. The current paper deals with preparing an amine-linked covalent organic framework (COF) with certain advantages compared to the mainstream rigid imine-linked COFs. The flexibility and abundance of the NH groups in the structure provide an excellent medium for adopting iodine from liquid and gas phases. A hydrazone-linked COF (Hz-COF) was synthesized in a room temperature solvent-mediated method, and its linkages were reduced using NaBH4 (NH-COF). The synthesized Hz-COF and NH-COF were utilized in the iodine adsorption experiment from solution and gas phases. The NH-COF exhibited an excellent iodine uptake from gas phase at 80 °C as high as 2.60 g g−1 that is higher than Hz-COF at the same conditions (2.05 g g−1). More interestingly, NH-COF represents a qe of 173 mg g−1 for iodine uptake from iodine solution (300 mg L−1). The iodine adsorption isotherm is best fitted to the Langmuir model, and the adsorption kinetic obeys the pseudo-second-order model. The flexibility of NH-COF and the presence of –NH– groups in the NH-COF structure endows it with accommodative adaptability to guest molecules, increasing the adsorption capacities compared to Hz-COF. Full reusability, high thermal and chemical stabilities, and a high level of polar functional groups made NH-COF an excellent adsorbent for I2 capture performance." @default.
- W4294328691 created "2022-09-02" @default.
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- W4294328691 date "2022-11-01" @default.
- W4294328691 modified "2023-10-05" @default.
- W4294328691 title "Developing novel amine-linked covalent organic frameworks towards reversible iodine capture" @default.
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- W4294328691 doi "https://doi.org/10.1016/j.seppur.2022.121948" @default.
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