Synthesis of MIL-88(Fe) and NH₂-MIL-88(Fe) using PEG under ambient pressure for methylene blue adsorption
Abstract
The MIL-88(Fe) and NH2-MIL-88(Fe) materials were successfully synthesized using a solvothermal method using polyethylene glycol (PEG) as the solvent at ambient pressure conditions. The synthesized materials were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) techniques. The materials exhibited a needle-like crystal morphology with lengths ranging from 0.5 μm to 2 μm and widths from 0.3 μm to 0.5 μm. XRD patterns of both materials revealed similar diffraction peaks, with major peaks at 9° and 10°, and additional peaks at 16°, 18°, and 20°. The BET-specific surface areas were determined to be 257 m²/g for MIL-88(Fe) and 105 m²/g for NH2-MIL-88(Fe). Both materials demonstrated the ability to remove over 70% of a 10 ppm methylene blue (MB) solution after 120 minutes of adsorption.
