Hierarchical synthesis of iron oxide nanoparticles by polyol cum calcination method and determination of its optical and magnetic behaviour

Saddique, Affia and Ahmad, Zahoor and Hoskins, Clare and Mirza, Muhammad Aslam and Naz, Asima and Ahmaj, Jamil (2020) Hierarchical synthesis of iron oxide nanoparticles by polyol cum calcination method and determination of its optical and magnetic behaviour. Materials Chemistry and Physics, 249. 122950. ISSN 0254-0584 (https://doi.org/10.1016/j.matchemphys.2020.122950)

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Abstract

Iron oxide nanoparticles (NPs) were prepared using a polyol method from Fe(III) acetylacetonate in the presence of polyvinylpyrrolidone (PVP). These particles were subsequently calcined and annealed using a digitally controlled furnace from 200 to 1000 ̊C producing crystallization. The morphology of the untreated nanoclusters and each calcined NP sample were observed under a scanning electron microscope (SEM) coupled with energy-dispersive X-ray (EDX) and their correlation explored. The SEM confirmed that the spherical NPs produced by the polyol method maintained their morphology during calcination at different temperatures. The extent of agglomeration was analyzed using dynamic light spectroscopy (DLS), which were measured as 1.0 μm. The effect of calcination on structural changes was monitored by X-ray diffraction (XRD), this revealed the presence of both hematite (α-Fe2O3) and maghemite (γ-Fe2O3) phases at low temperatures and the complete transformation into hematite at higher temperature. UV–Visible and fluorescent spectroscopy were used to analyze the optical properties and vibratory sample magnetometer (VSM) confirmed its paramagnetic characters.

  • Item type:Article
    ID code:72099
    Dates:
    Date
    Event
    15 July 2020
    Published
    19 March 2020
    Published Online
    17 March 2020
    Accepted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:20 Apr 2020 10:25
    Last modified:09 Apr 2024 01:25
    URI:https://strathprints.strath.ac.uk/id/eprint/72099
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