Synthesis and Characterization of SiO2 Coated Fe3O4 Nanoparticles by Co-precipitation Method
DOI:
https://doi.org/10.38032/scse.2025.3.20Keywords:
Co-precipitation, Nanoparticles, XRD, SEM, Band gapAbstract
This research investigated the structural and morphological characteristics of Fe3O4 nanoparticles (NPs), coated with a SiO2 shell, produced by co-precipitation method. Triethanolamine (TEA), cetyltrimethylammonium bromide (CTAB), ammonium hydroxide (NH4OH), iron salt (FeCl2.4H2O, FeCl3.6H2O), and tetraethyl orthosilicate (TEOS) are the precursors to form nanoparticles with a magnetite core coated with silica (SiO2). The drying temperature was 40 °C and then the sample was calcined at 550 °C temperature to enhance crystallinity and form a stable core-shell structure. The stability and surface functionality of magnetite (Fe3O4) nanoparticles introduces versatile materials with an extensive variety of uses. X-ray diffraction (XRD) confirmed the crystalline structure with distinct sharp peaks corresponding to Fe3O4-SiO2 phases with average crystallite size of 8.459 nm, and scanning electronic microscopy (SEM) revealed the narrow particle size distribution and exhibiting a spherical morphology. The calculated optical band gap of 3.21 eV represented its usage in optoelectrical field. The prevention from agglomeration and enhanced stability are the benefits of the core-shell nanostructured materials which has made them acting as effective adsorbent in environmental applications such as wastewater treatment, rapid magnetic separation and also in biomedical applications and drug delivery systems.
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Copyright (c) 2025 Shamima Akhter Urmi, M. Bodiul Islam, M. Mosiul Haque, M. Sadman Shahriar, Abdullah Al Mahmood (Author)
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