Journal
CHEMISTRY OF MATERIALS
Volume 13, Issue 11, Pages 3927-3932Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm010115h
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Low-dimensional iron chalcogenide Fe7S8 and FeSe2 microcrystals and FeTe2 bulk single crystals were synthesized via the reactions of FeCl3 with S or Se or Te powders in hydrazine hydrate solution (85%, v/v) at 140 degreesC for 36 h. The products were characterized by means of X-ray powder diffraction, rocking curve, transmission electron microscopy, electron diffraction, and scanning electron microscopy techniques. In the reaction process, hydrazine hydrate can coreduce Fe3+ and elemental chalcogen to Fe2+ and chalcogen anions, respectively, the combination of which can lead to the reaction proceeding completely. The morphologies of the products are affected by the temperature, pressure, and pH values. Moreover, a suitable speed of decreasing the temperature and proper supersaturation are two important factors in the formation of single-crystal FeTe2 Mossbauer spectra show the magnetism of Fe7S8 and nonmagnetic properties for FeSe2 and FeTe2 at room temperature.
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