Molybdenum Disulfide (MoS2) Nanoparticles - Properties, Applications

Topics Covered

Introduction
Chemical Properties
Physical Properties
Thermal Properties
Manufacturing Process
Applications

Introduction

Molybdenum is a Block D, Period 5 element, and sulfur is a Block P, Period 3 element. This article discusses the properties and applications of molybdenum disulfide nanoparticles. Molybdenum does not occur naturally as a free metal on Earth.

Generally, molybdenum disulfide has very good chemical stability and thermal stability. They can form a highly efficient dry lubricating film. Molybdenum disulfide nanoparticles possess a low friction coefficient, good catalytic activity, and excellent physical properties. They also have a large active surface area, high reactivity, and increased adsorption capacity compared to the bulk material.

Molybdenum disulfide nanoparticles appear in a black solid form.

Chemical Properties

The chemical properties of molybdenum disulfide nanoparticles are outlined in the following table.

Chemical Data
Chemical symbol MoS2
CAS No. 1317-33-5
Group Molybdenum 6
Sulfur 16
Electronic configuration Molybdenum [Kr] 4d5 5s1
Sulfur [Ne] 3s2 3p4
Chemical Composition
Element Content (%)
Molybdenum 59.94
Sulfur 40.05

Physical Properties

The physical properties of molybdenum disulfide nanoparticles are given in the following table.

Properties Metric Imperial
Density 5.06 g/cm3 0.182 lb/in3
Molar mass 160.07 g/mol -

Thermal Properties

The thermal properties of molybdenum disulfide nanoparticles are provided in the table below.

Properties Metric Imperial
Melting point 1185°C 2165°F

Manufacturing Process

Molybdenum disulfide nanoparticles can be synthesized at high temperature as mono- and polycrystalline materials or at low temperature using various electro-chemical routes. In the low temperature method, a chemical solution reaction route can be used between the organometallic precursor Mo(CO) 6 and sulfur in p-xylene at 140°C. The MoS2 nanoparticles obtained is of 10–30 nm diameter, and mostly amorphous with a rounded shape.

Applications

The key applications of molybdenum disulfide nanoparticles are as follows:

  • In lubricant applications
  • In difficult to maintain equipment, such as space vehicles, satellites and military fields
  • In composite applications
  • As a conductive filler
  • As a catalyst for coal liquefaction
  • Can be used to prepare special materials, catalytic materials and gas storage.

Source: AZoNano

 

Date Added: Apr 10, 2013 | Updated: Jul 12, 2013
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