Abstract
Effectively removing radioactive iodine from the environment is critical for mitigating the risks associated with nuclear accidents. This research presents a brand-new Fe-Cu-BTC metal-organic framework (MOF) composite that works very well to absorb iodine. We employed a facile one-pot solvothermal method to achieve epitaxial growth of Fe-BTC on a Cu-BTC substrate. A full analysis using SEM, EDS, FTIR, XRD, BET, TEM, XPS, Raman, and TGA/DTA showed that the composite was successfully made while the crystalline structure of the CuBTC was kept. It was amazing how well the Fe-Cu-BTC composite could absorb iodine, reaching maximum capacities of 217.92 mg/g in solution and 623.21 mg/g in vapor phases, respectively, within the time limits given. The material demonstrated remarkable stability and recyclability, retaining its structural integrity and efficiency over five consecutive adsorption-desorption cycles. The high BET surface area of 820.35 m/g, pore volume of 0.328 cm/g, and pore diameter of 2.950 nm of the composite contributes to its superior adsorption performance. The composite exhibits exceptional stability under acidic conditions with a pH of 2>8.Studies of the adsorption isotherm and kinetics showed that the Langmuir and pseudo-second-order models correctly describe how iodine binds, with R² values of 0.995 and 0.994, respectively. XPS and Raman spectroscopy with peak values (72.21, 104.4, and 167.04) cm-1 confirmed the formation of polyiodides (I₃⁻ and I₅⁻) on the MOF surface, suggesting a physical adsorption mechanism.The Fe-Cu-BTC composite has a controlled synthesis, millimeter-scale dimensions, a porous structure, is very stable, and can be recycled easily. It looks like it could be a good way to capture and store iodine from a variety of environmental sources, such as reprocessing plant off-gas streams and liquid effluents.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call