Hydrothermal synthesis of novel MIL-100(Fe)@SBA-15 composite material with high adsorption efficiency towards dye pollutants for wastewater remediation

MIL-100(Fe)@SBA-15 (1) was synthesized as a composite material using SBA-15 and precursors of MIL-100(Fe) with the hydrothermal method. The structural characteristics, surface area, and morphology of the synthesized materials were measured by several analyses. The BET surface area increased from 797 m² g⁻¹ for SBA-15 to 1564 m² g⁻¹ for composite 1. The synthesized materials, SBA-15, MIL-100(Fe), and composite 1, were used for removal of methylene blue (MB), rhodamine B (RB), methyl orange (MO), and alizarin yellow R (AY) organic dyes from aqueous solution. Results revealed that composite 1 (25 mg) could adsorb most of the dyes with a maximum adsorption capacity of 38,32,30, and 41 mg g⁻¹ for MB, RhB, MO, and AY solutions (50 mL,50 mg L⁻¹), respectively. Moreover, composite 1 showed ultrafast and high adsorption efficiency to removal mixed cationic and anionic dye solutions. The isotherm, kinetic and thermodynamic studies for adsorption of MB solution with the composite 1 were evaluated and discussed thoroughly. Herein we suggest composite 1 as a novel adsorbent with high commercial potential for wastewater treatment because of easy preparation, good structure stability, and simultaneous adsorption of several dye solutions in a short time.