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    Testing the Efficacy of the Synthesis of Iron Antimony Sulfide Powders from Single Source Precursors

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    Authors
    Makin, Fadiyah; email: fadiyah.makin@postgrad.manchester.ac.uk
    Alzahrani, Dalal; email: dalal.alzahrani@postgrad.manchester.ac.uk
    Alam, Firoz; orcid: 0000-0002-5070-5899; email: firoz.alam@manchester.ac.uk
    Tuna, Floriana; email: Floriana.Tuna@manchester.ac.uk
    Lewis, David J.; orcid: 0000-0001-5950-1350; email: david.lewis-4@manchester.ac.uk
    Publication Date
    2021-08-02
    
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    Abstract
    The antimony-iron sulfide system in general does not produce alloys below 540 °C from traditional solid-state methods. However, single source precursors have been known to produce unexpected products that arise from kinetically trapped polymorphs. In this paper, we test the efficacy of this approach toward the Fe-Sb-S system. Antimony and iron diethyldithiocarbamate complexes of the form Sb[S2CN(Et2)]3 (1) and Fe[S2CN(Et2)]3 (2) were synthesised, characterised, and used as single-source precursors for the preparation of Sb2S3, FexSy, and mixed iron antimony sulfide Sb2(1−x)Fe2xS3 (0 ≥ x ≥ 1) powders using the solvent-less thermolysis method at different temperatures ranging from 300 to 475 °C. The effect of different mole fractions of the iron precursor was evaluated on morphology, shape, and optical and magnetic properties of Sb2(1−x)Fe2xS3 (0 ≥ x ≥ 1). The obtained powders were characterized by X-ray diffraction (XRD), Raman spectroscopy scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, magnetometer measurement, and UV/vis/NIR spectroscopy. The results demonstrated that the crystalline structure, morphology, and elemental composition of the samples changed with the mole fraction of the precursor. There was significant phase separation between Sb and Fe sulfides noted from EDX spectroscopic mapping, yet an optoelectronic study monitoring the direct band gap energy of antimony sulfide shows that the band gap energy increases as a function of Fe content, which suggests limited alloying is possible from the single source route.
    Citation
    Inorganics, volume 9, issue 8, page e61
    Publisher
    MDPI
    URI
    http://hdl.handle.net/10034/625473
    Type
    article
    Description
    From MDPI via Jisc Publications Router
    History: accepted 2021-07-21, pub-electronic 2021-08-02
    Publication status: Published
    Funder: D.J.L. and F.A. thank the EPSRC for funding (EP/R020590/1); Grant(s): (EP/R020590/1)
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