| 초록 |
The development of efficient adsorbents to remove radioactive methyl iodide (CH3I) in humid environments is crucial for air purification after nuclear power plant waste spills. Here, we successfully prepared a series of the post-synthetically modified MIL-101s with a Brønsted acid group followed by the ion-exchange of Ag. Functionalized MIL-101s were obtained by either one-pot synthesis (MIL-101-SO3Ag) or a post-synthetic modification process (MIL-101-NH(CH2)3SO3Ag) to remove the CH3I at 0.31 ppm and RH 95%. Physico-chemical properties of samples were characterized by XRD, XPS, FT-IR, ICP and the enhanced hydrophobicity was evaluated by the hydrophobic index (HI) with the competitive adsorption of water and cyclohexane vapor. Remarkably, the post-synthetically modified MIL-101-RSO3Ag showed exceptional adsorption performance as determined by its high decontamination factor at 303 K and RH 95% and maintained ~94–100% of its fresh adsorbent performance during five cycle repetitions. |
