Adsorptive removal of toxic organic dyes from water by using a magnetic dual metal-organic framework hybrid (MIL-53(Fe)@MIL-101(Fe)/CoFe2O4) as a novel fast nano-adsorbent

Abstract: In this research, a novel magnetic nanocomposite adsorbent was created using a hybrid of two iron-based metal-organic frameworks (MOFs), MIL-53(Fe) and MIL-101(Fe), decorated with magnetic CoFe2O4 nanoparticles. The resulting composite, MIL-53(Fe)@MIL-101(Fe)/CoFe2O4, was thoroughly characterized through various techniques including FT-IR spectroscopy, XRD, Raman spectroscopy, FE-SEM, EDX, VSM, UV-vis spectroscopy, zeta potential, and BET surface area measurements. This nanocomposite showed promising results as an adsorbent for organic dyes, specifically methylene blue (MB) and methyl orange (MO) in aqueous solutions. The use of this nanocomposite as an adsorbent in aqueous solutions showed great efficacy in removing organic dyes such as methylene blue (MB) and methyl orange (MO). The nanocomposite achieved rapid and complete adsorption of MO within 30 seconds and MB within 10 minutes. The hybrid exhibited the enhanced adsorption compared to single MOFs due to the synergistic effects between the two materials. Several factors were examined, such as dye concentration, pH, temperature, ionic strength, and the amount of adsorbent used. Thermodynamic analysis revealed an endothermic and spontaneous process. It maintained its structure and proved to be stable and reusable, making it an ideal choice for removing dyes from contaminated water. Additionally, the magnetic properties of the nanocomposite allowed for easy separation and recovery from the solution.

Adsorptive removal of toxic organic dyes from water by using a magnetic dual metal-organic framework hybrid (MIL-53(Fe)@MIL-101(Fe)/CoFe2O4) as a novel fast nano-adsorbent Keywords:

MOF@MOF hybrids , Magnetic nanocomposite , Adsorption Process , Toxic dyes , MIL-101(Fe)