Facile synthesis of WSe2 nanoparticles and carbon nanotubes

Swati V. Pol, Vilas G. Pol, Jose M. Calderon-Moreno, Aharon Gedanken

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A single-step, nonaqueous, solventless, facile chemical reaction is carried out to synthesize a WSe2 nanoparticles/carbon nanotubes [WSe 2/C] composite at moderate temperature. The use of highly toxic H2Se gas is avoided, reacting elemental selenium powder with W(CO)6 at 750 °C under their autogenic pressure in a closed reactor. Without further processing the as-prepared WSe2/C nanocomposite, detailed characterizations are carried out, and a proposed reaction mechanism is discussed. X-ray diffraction measurements are consistent with the hexagonal phase of WSe2, and the highly crystalline nature of WSe2 nanoparticles is also confirmed by high-resolution transmission electron microscopy pictures. Scanning electron microscopy measurements reveal that WSe2 nanoparticles and carbon nanotubes are formed, with the composition being tracked by C, H, N, S and energy-dispersive X-ray analysis. The Brunauer, Emmett, and Teller surface area analysis technique is implemented for the determination of nitrogen gas adsorption on the surface of the WSe2/C nanocomposite.

Original languageEnglish
Pages (from-to)5356-5360
Number of pages5
JournalJournal of Physical Chemistry C
Issue number14
StatePublished - 10 Apr 2008


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