Abstract
MgO powder is used as a removable ‘cast’ in a simple, scalable synthesis of dispersible Fe3C nanoparticles.
Highlights
Transition metal carbides have historically been valued for their hardness and chemical resistance
Iron carbide (Fe2.2C and Fe5C2) nanoparticles are applied in magnetic hyperthermia for cancer treatment[4] and Fischer–Tropsch synthesis of liquid hydrocarbons.[5]
We address the challenge of producing dispersible iron carbide (Fe3C) nanoparticles by synthesizing the nanoparticles within a nanostructured ‘cast’ (Fig. 1c)
Summary
Transition metal carbides have historically been valued for their hardness and chemical resistance. The MgO cast is removed using aqueous ethylenediaminetetraacetic acid (EDTA) and the resulting Fe3C nanopowder is used to make a ferro uid, demonstrating the dispersible nature of the Fe3C particles. SAXS derives from an interaction between the incident X-ray radiation and regions of contiguous electron density within a sample, which here are nanoparticles (Prussian blue, MgO and Fe3C) and residual carbon.
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