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Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical methodMatjaž Kristl,
Brina Dojer,
Sašo Gyergyek,
Janja Kristl, 2017, izvirni znanstveni članek
Opis: Nickel and cobalt sulfides are promising materials in different cutting-edge research areas like solar cells, supercapacitors, catalysts, and electrode materials. Nickel and cobalt sulfides with various stoichiometries have been synthesized sonochemically from $Ni(CH_3COO)_2$ ∙ $4H_2O$, $Co(CH_3COO)_2$ ∙ $2H_2O$ and different sulfur precursors using a direct immersion ultrasonic probe. The products were characterized by X-ray powder diffraction, transmission electron microscopy (TEM) including EDX analysis, IR and UV–Vis spectroscopy and elemental analysis. Following products have been obtained: $NiS$, $Ni_3S_4$, $CoS_{1.097}$ and $Co_9S_8$, with average crystallite sizes in the range 7−30 nm. Effects of different reaction conditions on the size, morphology and optical band-gap energy were evaluated. Optical band-gap energies in the range 3.3 eV−3.8 eV were observed for the obtained nanoparticles.
Ključne besede: material science, inorganic chemistry, nanotechnology
Objavljeno v DKUM: 14.07.2017; Ogledov: 1644; Prenosov: 404
Celotno besedilo (2,41 MB)
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