Synthesis and iodine adsorption behavior of covalent organic framework based on phenanthro[9,10-d]imidazole triamine
Covalent Organic Frameworks(COFs)as an emergent category of porous materials are renowned due to their exceptional adsorption capabilities towards biological small molecules and are extensively applied in removing pollutants as adsorbents.Amine COF(PIP-B COF)was synthesized with phenanthro[9,10-d]imidazole triamine and terephthalaldehyde as monomers through a solvothermal"bottom-up"approach and its structure was characterized and confirmed by fourier transform infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD)and scanning electron microscope(SEM).The adsorption properties of solid-state iodine vapor and iodine in a cyclohexane solution was evaluated with PIP-B COF as adsorbent.The results suggest that PIP-B COF possesses superior adsorption properties for iodine in both the solid and liquid phases,and exhibits the remarkable recyclability,hinting the potential application in real water detection.
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