CONTROLLABLE PREPARATION OF NANO MOLYBDENUM DISULFIDE BY HYDROTHERMAL METHOD

Nano molybdenum disulfide possesses unique chemical and physical properties. In this paper molybdenum disulfide nanoparticles with spherical and flower-like structure are prepared via a hydrothermal method. Sodium molybdate and thioacetamide are taken as precursors, polyethylene glycol (PEG-20000), hexadecyl trimethyl ammonium chloride (CTAC) and anhydrous ethanol are used as additives. The properties of the product are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that under acidic conditions, molybdenum disulfide nanoparticles with spherical shape are obtained when PEG-20000 and CTAC are added. The nanoparticles are uniform in size with a diameter of about 100 nm. Molybdenum disulfide nanoparticles with a flower-like structure are obtained when anhydrous ethanol is added. Their diameters under sulfuric acid and hydrochloric acid conditions are 190 nm and 70 nm, respectively. Yield analysis reveals that the highest yield (which can be up to 79 %) occurs by adding polyethylene glycol in a sulfuric acid environment.