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Novel Magnetic Silica-Ionic Liquid Nanocomposites for Wastewater Treatment

Ayman M Atta¹, Yaser M Moustafa², Abdelrahman O Ezzat¹

¹Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

Nanomaterials (Basel, Switzerland)

|January 8, 2020

Abstract:

In this work, new imidazolium silica-ionic liquids doped with magnetite nanocomposites are prepared for use in the field of water purification owing to their unique properties, which can be manipulated by an external magnetic field. A silane precursor based on aminopropyltriethoxysilane (APTS) condensed with p-hydroxybenzaldehyde and glyoxal in an acetic acid solution is used to prepare disiloxyimidazolium ionic liquid (SIMIL). The silica composite (Si-IL) and silica-coated magnetite (Fe₃O₄-Si-IL) composites are prepared using the sol-gel technique. The chemical structures, morphologies, crystalline lattice structures, thermal stabilities, surface charges, surface areas, particle sizes, and magnetic characteristics of Fe₃O₄-Si-IL and Si-IL are investigated. The Fe₃O₄-Si-IL and Si-IL nanocomposites show excellent chemical adsorption capacities as 653 and 472 mg g^-1, respectively, during times ranging 90 to 110 min when they are used as adsorbents to remove Congo red (CR) dye as a water pollutant.

Keywords:

adsorbents imidazolium cations ionic liquid magnetite nanocomposite silica nanoparticles

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