Preparation and Characterization of Silica-Coated Iron Oxide Nanoparticles (Fe3O4@SiO2 NPs)

  • Nurul Izza Taib Faculty of Applied Sciences, Universiti Teknologi MARA, Perak Branch, Tapah 35400, Perak, Malaysia
  • Famiza Abdul Latif Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Nur Diyana Syazwani Zambri Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

Abstract

In this study, this SiO2 has been coated on the surface of Fe3O(Fe3O4@SiO2) by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) under alkaline medium at 80oC. It was found that only 500  mL TEOS is required to obtain the best coated Fe3O4 core structures which has been confirmed from its TEM micrograph. FTIR analyses revealed the formation of Si-O-Si bonds at 1084.2–1101.4 cm-1 hence confirmed that SiO2 has been successfully coated the Fe3O4 core. From the FESEM analyses, the average size of silica was ~ 50 -70 nm.  EDX of the Fe3O4@SiO2 showed that silica had been effectively bonded onto the surface of Fe3O4. The VSM measurements confirmed the superparamagnetic properties of Fe3O4@SiO2 that is desirable for biomedical applications.

Published
2021-03-15
How to Cite
TAIB, Nurul Izza; ABDUL LATIF, Famiza; ZAMBRI, Nur Diyana Syazwani. Preparation and Characterization of Silica-Coated Iron Oxide Nanoparticles (Fe3O4@SiO2 NPs). Scientific Research Journal, [S.l.], v. 18, n. 1, p. 161-178, mar. 2021. ISSN 2289-649X. Available at: <https://myjms.mohe.gov.my/index.php/SRJ/article/view/11291>. Date accessed: 03 nov. 2024. doi: https://doi.org/10.24191/srj.v18i2.11291.