Synthesis and characterization of magnetite nano particles with high selectivity using in-situ precipitation method

Harith Rashid (Corresponding author), Muhammad Adil Mansoor, Bilal Haider, Rizwan Nasir, Sharifah Bee Abd Hamid, Aymn Abdulrahman

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)
112 Downloads (Pure)

Abstract

In-situ precipitation method is widely used and reported in the literature for the synthesis of iron oxide nanoparticles based on their applications in many fields. However, the rate of reaction and rate constant for the production of Magnetite Phase of iron oxide did not study in depth. Reaction rates are required to design a scale-up of the process. In this study, Magnetite phase of iron oxide nanoparticles (Fe 3 O 4 ) are synthesized by the in-situ precipitation method, and the overall reaction rate is evaluated based on the concentration of Magnetite produced during the process. Further, X-ray diffraction, energy-dispersive X-ray spectroscopy and Raman spectroscopy are used to confirm the presence of a higher proportion of magnetite (Fe 3 O 4 ) in the final product, which is responsible for more top magnetic properties 74.615 emu. Changes in morphology of these nanoparticles at different intervals of the reaction are reported by transmission electron microscope. The results showed that spherical nanoparticles synthesized at different intervals of the reaction have a very narrow range of particle size, i.e. 9–15 nm. Detailed analysis reveals the presence of a higher share of maghemite (Fe 2 O 3 ) at the start of the reaction. However, maghemite eventually is converted to magnetite by the end of the reaction, thereby enhancing the magnetic strength of the nanoparticles.

Original languageEnglish
Pages (from-to)1207-1215
Number of pages9
JournalSeparation Science and Technology
Volume55
Issue number6
DOIs
Publication statusPublished - 12 Apr 2020

Keywords

  • agglomeration
  • break-up
  • coprecipitation
  • Magnetite
  • super para-magnetic

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