Preparation and Characterization of Magnetite-Silica Nano-Composite as Adsorbents for Removal of Methylene Blue Dyes from Environmental Water Samples

Abstract:

Magnetite-silica nanocomposites (Fe₃O₄/SiO₂) have been synthesized and characterized and were used as an effective sorbent material for dyes removal from environmental water samples. They were prepared by a simple procedure via a co precipitation of iron (II) and iron (III) ion mixture in ammonium hydroxide and then was impregnated by a sodium silicate. The prepared samples were characterized using Zeta potential, XRD, VSM, TEM, EDS, and porosity analysis. The result of characterization showed that Fe₃O₄ nanoparticles have been coated by silica. The composite have been superparamagnetic behaviour at room temperature and contain both meso-and microporosity system. Mesoporosity contributes dominantly to the pore volume. Adsorption performance of magnetic-silica nanoparticles were examined its ability to adsorp methylene blue dye in aqueous solution. The 20 mg/L of initial concentration of methelene blue, 1 gr/L adsorbent in solution and under shakker for 5 hour, the remain of methylene blue in solution was 13,3% for Fe₃O₄/SiO₂ (3:1), 30,2% for Fe₃O₄/SiO₂ (2:1) and 24,2 % for Fe₃O₄/SiO₂ (1:1). The composite was effective to adsorb dyes in water and can be easily recovered from treated water with helping of magnetic bar.

• Periodical: Advanced Materials Research (Volume 896)
• Pages: 525-531
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.896.525
• Online since: February 2014
• Authors: Adel Fisli*, Saeful Yusuf, Ridwan Ridwan, Yuni K. Krisnandi, Jarnuzi Gunlazuardi
• Keywords: Adsorption, Dyes, Fe₃O₄, Nanocomposite, Silica-Coated Magnetite, SiO₂

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