Highly stable-silica encapsulating magnetite nanoparticles (Fe 3O4/SiO2) synthesized using single surfactantless- polyol process

Mohamed Abbas, B. Parvatheeswara Rao, Md Nazrul Islam, S. M. Naga, Migaku Takahashi, Cheolgi Kim

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

We developed a new one-pot synthesis method for silica coated magnetite nanoparticles by way of a cheap- modified polyol process. In this reaction, polyethylene glycol was used as a solvent media and it has been found to play a key role to act as a reducing agent, stabilizer as well as a linker for silica coating, simultaneously. The Fe3O4/SiO2 sample prepared by this new method was compared with other seed Fe3O 4 and Fe3O4/SiO2 samples synthesized through the modified Stober method and characterized using different analysis techniques such as transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, thermogravimetric analysis and Fourier transform infrared spectroscopy. The magnetic properties of the seed Fe3O 4 and silica coated magnetite nanoparticles were studied by vibrating sample magnetometer at room temperature. The produced composite sample showed excellent stability against oxidation when annealed at 600 C in presence of hydrogen gas. Thus, the facile new polyol process adopted in our study appears to be a promising route for synthesis of highly stable, hydrophilic silica coated magnetite nanoparticles.

Original languageEnglish
Pages (from-to)1379-1385
Number of pages7
JournalCeramics International
Volume40
Issue number1 PART B
DOIs
Publication statusPublished - 2014 Jan
Externally publishedYes

Keywords

  • C. Magnetic properties
  • Core/shell
  • Polyol method
  • Stober method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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