Photodegradation of organic compounds using MOF-۷۴ nanocomposite

Metal-organic frameworks (MOFs) are crystalline compounds that can form porous ۱D, ۲Dor ۳D structures. MOFs have attracted many researchers attention in drug delivery, catalysis, gasstorage, and other applications because of their high specific surface area, large porosity, andadjustable chemical functions. MOF-۷۴-type frameworks are considered one of the mostpromising metal–organic frameworks owing to their remarkable structural features and propertiessuch as a high density of open metal sites, hexagonal channels along the c-axis, and highporosity[۱,۲]. In the present work, the synthesis of MOF-۷۴ and MOF-۷۴ nanocomposite wassuggested. The new nanocomposite was prepared by solvothermal method at room temperature.MOF-۷۴ nanocomposite was characterized by X-ray diffraction (XRD), field emission scanningelectron microscopy (FESEM), transmission electron microscopy (TEM), diffusion reflectancespectroscopy (DRS) and nitrogen adsorption and desorption measurement. XRD results confirmedthe successful synthesis of the MOF-۷۴. FESEM results showed that the synthesized support hasan almost spherical morphology. TEM images confirmed the presence of MOF-۷۴ nanoparticleswith an average length of ۵.۴۷ nm. Atomic absorption results showed that MOF-۷۴ has a goodstability in water. The DRS spectrum of the nanocomposite shows an absorption edge at ۴۶۵ nm,which corresponds to MOF-۷۴. BET results also showed that the synthesized nanocomposite hasa surface area of ۶۰۰ m۲/ g and an average pore size of ۱۳ nm. The photocatalytic activity ofnanocomposites was evaluated under visible light irradiation for the removal of Congo red (CR)dye[۳]. The removal rate of CR dye was performed under visible light irradiation.

کلیدواژه ها:

Metal-organic frameworks ، MOF-۷۴ ، Photocatalytic ، Nanocomposite ، Visible light