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Reaction of Ni 2+ and SnS as a Way to Form Ni@SnS and Sn 2 Ni 3 S 2 Nanocrystals: Control of Product Formation and Shape
Author(s) -
Rommel Stefan Michael,
Weihrich Richard
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201500498
Subject(s) - ethylenediamine , nanocrystal , reducing agent , ethylene glycol , scanning electron microscope , redox , materials science , spectroscopy , diffusion , energy dispersive x ray spectroscopy , solvent , chelation , crystallography , chemical engineering , nuclear chemistry , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , physics , quantum mechanics , engineering , composite material , thermodynamics
Reductive diffusion of Ni 2+ into SnS particles was shown to selectively form Sn 2 Ni 3 S 2 , hybrid, or even core‐shell Ni@SnS, Ni 1.523 Sn, and Ni 3 S 2 , by tuning the reaction conditions at low temperatures. The mechanism of Ni 2+ reduction and diffusion into SnS was observed in ethylene glycol, which served both as solvent and reducing agent. Tuning of reaction temperature and duration, morphology of the template SnS, and the application of ethylenediamine as supporting chelating agent, influence the formation of the final products. Their formation was controlled by carefully adjusting redox and equilibrium reactions. The products were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X‐ray spectroscopy analysis (EDX).