In this study, intermetallic TiFe nanostructures were chemically prepared from Ti-Fe oxide precursors using a CaH reducing agent in molten LiCl at as low as 600 °C. The used precursor was spherical oxide nanoparticles or commercial FeTiO bulk powder. After the reduction treatment, the former precursor was changed to an aggregation of TiFe nanoparticles with a particle size of 44-46 nm. Surprisingly, the latter precursor was reduced to a layered morphology composed of TiFe nanoparticles with a particle size of 47-65 nm. An intermetallic compound with a unique layered morphology was found for the first time, and the layered morphology could have originated from the morphology of the FeTiO precursor in which the Fe and Ti ions occupied alternating layers perpendicular to the trigonal -axis. The precursor originated morphology was enabled by the proposed low reduction temperature method, and the environment-friendliness of the proposed method was finally evaluated using life-cycle assessment (LCA).
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| http://dx.doi.org/10.1039/d1na00251a | DOI Listing |
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