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• Goreishi SM, Meshkat SS, Dadkhah AA, IF-WS2 nanoparticles size design and synthesis via chemical reduction, Materials Research Bulletin, 45(5), 584-588

ABSTRACT An innovative synthesis of inorganic fullerene-like disulfide tungsten (IF-WS 2) nanoparticles was developed using a chemical reduction reaction in a horizontal quartz reactor. In this process, first tungsten trisulfide (WS 3) was formed via a chemical reaction of tetra thiotungstate ammonium ((NH 4) 2WS 4), polyethylene glycol (PEG), and hydrochloric acid (HCl) at ambient temperature and pressure. Subsequently, WS 3 was reacted with hydrogen (H 2) at high temperature (1173-1373 K) in a quartz tube. The produced WS 2 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDAX), and transmission electron microscopy (TEM). The characterization results indicated that the high-purity (100%) IF-WS 2 nanoparticles were produced. Moreover, addition of surfactant (PEG) and higher operating temperature (1173-1373 K) decreased the particles agglomeration, and consequently led to the reduction of average diameter of WS 2 particles in the range of 50-78 nm. The developed method is simple, environmentally compatible, and cost-effective in contrast to the conventional techniques. © 2010 Elsevier Ltd. All rights reserved.

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