Microemulsion-mediated synthesis of nanosize molybdenum sulfide particles

Journal Article · Tue Mar 01 00:00:00 EST 1994 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1994.1087· OSTI ID:7233234

Boakye, E; Radovic, L R; Osseo-Asare, K ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

A microemulsion-based method for the synthesis of molybdenum sulfide nanoparticles is reported. Molybdenum sulfide particles in the size range 10--80 nm have been precipitated in water-in-oil microemulsions (water-containing inverse micelles) formulated with polyoxyethylene(5)nonylphenyl ether (NP-5). The particles were synthesized in the NP-5/cyclohexane/water microemulsion system by acidifying ammonium tetrathiomolybdate solubilized in the water cores of the inverse micelles. Particle characterization was accomplished by chemical analysis, transmission electron microscopy, and ultraviolet/visible spectroscopy. The small size and the cage-like nature of the microemulsion water cores limit particle growth and aggregation. The particle size was found to be a function of the water-to-surfactant molar ratio and the average number of ammonium tetrathiomolybdate ions solubilized per water core. These trends are rationalized in terms of classical nucleation theory and aggregative growth concepts.

• DOE Contract Number: AC22-90PC90054
• OSTI ID: 7233234
• Journal Information: Journal of Colloid and Interface Science; (United States), Vol. 163:1; ISSN 0021-9797
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
SYNTHESIS
MOLYBDENUM SULFIDES
AMMONIUM COMPOUNDS
HETEROGENEOUS CATALYSIS
MICELLAR SYSTEMS
MOLYBDATES
PARTICLE SIZE
CATALYSIS
CHALCOGENIDES
MOLYBDENUM COMPOUNDS
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SIZE
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties