An easy one-pot solvothermal synthesis of poorly crystalline solid ReS2-C microspheresReport as inadecuate




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Dense microspheres consisting of poorly crystalline ReS2 embedded in carbon were synthesized with ahigh yield via a facile one-pot solvothermal route, by reacting dirhenium decacarbonyl, elemental sulfurand an aromatic solvent benzene, toluene or p-xylene for 24 h at 180 C. X-ray diffraction XRD,scanning electron microscopy SEM, high resolution transmission electron microscopy HRTEM,energy-dispersive X-ray spectroscopy EDS, Raman spectroscopy, and Fourier transform infrared spectroscopyFT-IR techniques were used to characterize the samples. The resulting microspheres weredense, with average diameters between 0.79 and 1.40 mm, had smooth surfaces and were constructed ofReS2 sheet-like structures with 4.5e9.8 wt % of structural amorphous carbon, which is retained as atextural stabilizer after calcination at 800 C. The synthesis was repeated using isopropanol and cyclohexane,whose products were agglomerated grains and botryoidal quasi-spherical particles, respectively.A possible formation mechanism of ReS2-C microspheres was preliminarily presented, in order to clarifythe mechanistic differences between the rhenium carbonyl and other transition metal carbonyls used insimilar syntheses.Nota general

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Author: Aliaga, Juan Antonio; - Araya, Juan Francisco; - Lozano, Harold; - Benavente, Eglantina; - Alonso Núñez, Gabriel; - González,

Source: http://repositorio.uchile.cl/



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