Journal article
Synthesis of greigite (Fe3S4) particles via a hydrothermal method
AIP advances, Vol.9(3), pp.35012-035012-5
03/2019
Handle:
https://hdl.handle.net/2376/113259
Abstract
Greigite (Fe3S4) particles, with strong ferrimagnetic behavior, have been found to have desirable uses in the areas of biomedical and environmental applications. Size-dependent magnetic properties of greigite can play a crucial role in efficiency of its applications. This study reviews two synthetic approaches to producing such particles. The methods tested within this study include a coprecipitation synthesis and a hydrothermal process. While the coprecipitation method proved to be ineffective at producing greigite, the hydrothermal process showed promise after consistently producing greigite. For the hydrothermal process, the effects of synthesis time, autoclave atmosphere, and polyvinylpyrrolidone (PVP) addition as a capping agent to control particle growth were investigated using X-ray diffractometry (XRD) with Rietveld refinement, vibrating sample magnetometry (VSM), and scanning electron microscopy (SEM). The results show that, while pyrite (FeS2) forms as an impurity phase, increasing the synthesis time up to 18 hours increases the greigite fraction up to 70 wt% and saturation magnetization up to ∼ 35 emu/g for the powder synthesized in argon. The SEM micrographs of this sample reveal a mean greigite particle size of ∼ 700 nm. It was found that adding PVP brings about a much more uniform microstructure of agglomerated plate-shape particles with nano-sized features.
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Details
- Title
- Synthesis of greigite (Fe3S4) particles via a hydrothermal method
- Creators
- Jonathan Moore - School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United StatesEmily Nienhuis - School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United StatesMostafa Ahmadzadeh - School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United StatesJohn McCloy - School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99163, United States
- Publication Details
- AIP advances, Vol.9(3), pp.35012-035012-5
- Academic Unit
- Mechanical and Materials Engineering, School of
- Number of pages
- 5
- Grant note
- DE-NE0008597 / U.S. Department of Energy (http://dx.doi.org/10.13039/100000015)
- Identifiers
- 99900547776701842
- Language
- English
- Resource Type
- Journal article