Nano-composites comprised of magnetite nanoparticles in a pectin matrix were prepared by the co-precipitation method. Both sodium hydroxide and ammonium hydroxide were used as precipitating agents and the effects of stoichiometric ratios of iron salts to polymer concentration on particle properties were investigated. The precipitates obtained with NH4OH were sponge-like. The XRD pattern revealed magnetite as the only iron oxide phase present when NH4OH was used as precipitating base whilst nanoparticles precipitated using NaOH showed the presence of additional peaks. The nanocomposites obtained were further characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and zeta-potential. FT-IR confirmed the COO-Fe linkage. Zeta-potential analysis showed a potential change from positive in pure magnetite to negative in polymer coated magnetite depending on the oxide-polymer ratio. SEM and TEM showed fairly evenly distributed nanosize pores.
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机译:铝合金/碳纤维/聚醚醚酮混和十字迭奈米复材积层板之研制与高温下机械行为 Fabrication and Mechanical Behavior of Al/APC-2 Hybrid Cross-Ply Nanocomposite Laminates at Elevated Temperature
机译:Synthesis and Characterization of L-Lysin Coated Iron Oxide Nanoparticles as Appropriate Choices for Cell Immobilization and Magnetic Separation | Bentham Science.
机译:synthesis and structural characterisation of the lead-platinum sulfido aggregates [pt2(μ-s)2(pph3)4pbX2] (X = Br, I); promotion of rare tetrahedral geometry for lead(II)