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Preparation of Water-soluble Molybdenum Disulfide Nanoparticles and Characterization As Well As Investigation of the Tribological Behavior

Author: MengQingJuan
Tutor: ZhangZuoMao
School: Henan University
Course: Organic Chemistry
Keywords: A water-soluble molybdenum disulfide Nanoparticles Preparation Characterization Tribological properties
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 188
Quote: 1
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Abstract


In this paper, a series of studies carried out for the Preparation and Characterization and tribological properties evaluation of nano-scale molybdenum disulfide , main contents and results are as follows : a reducing agent under conditions of molybdenum disulfide preparation, characterization and tribological properties to homemade tetrathiocarbonate ammonium molybdate (ATTM) as raw materials , without introducing other reducing agents , under relatively low temperature conditions , in aqueous solution to prepare a nano- molybdenum disulfide ; using X-ray powder diffraction ( XRD ) transmission electron microscopy (TEM), UV - visible absorption spectrometer ( UV -Vis ) , X-ray photoelectron spectroscopy (XPS) to characterize the structure of the product was initially investigated the tribological properties of the product in the water , and the four-ball friction and wear tests . The results show that the preparation of molybdenum disulfide as the spherical particles , serious agglomeration ; good dispersion properties in water and ethanol , and its water dispersion system tribological properties superior to pure . Preparation of molybdenum disulfide , hydrazine hydrate under reducing conditions using characterization and tribological properties of 80% (wt) of hydrazine hydrate as a reducing agent , to homemade tetrathiotungstate ammonium molybdate as raw materials were prepared in aqueous solution molybdenum disulfide; by means of XRD , TEM , XPS characterization of the structure of the product , and the four-ball friction and wear tests measured the tribological properties of the product in the water . The results show that the preparation of molybdenum disulfide particles of irregular shape, did not get the desired spherical particles . Poor dispersion properties of pure water and ethanol , but the aqueous dispersion tribological performance slightly better than pure water . Glycol restored under the conditions of molybdenum disulfide Preparation , Characterization and tribological properties of glycol as a reducing agent and solvent ammonium molybdate with homemade tetrathiomolybdate (ATTM) was prepared from the nanoscale molybdenum disulfide; by means of XRD , TEM , XPS characterization of the structure of the product , and the four-ball friction and wear tests measured the tribological properties of the product in the water . The results showed that the preparation of molybdenum disulfide of spherical particles have a good dispersibility in water and ethanol , and can effectively improve the antifriction , antiwear and extreme pressure bearing properties of pure water .

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