Description Uses References
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TUNGSTEN SULFIDE

Description Uses References
Product Name
TUNGSTEN SULFIDE
CAS No.
12138-09-9
Chemical Name
TUNGSTEN SULFIDE
Synonyms
TUNGSTEN DISULFIDE;Tungsten Disulfide Nanopowder;EASCHEM;Tungsten Sulde;powder, 2 Tungsten sulfid;Wolframdisulfid;TUNGSTEN SULFIDE;ungstendisulfide;WS2 powder 0.88μm
CBNumber
CB9239043
Molecular Formula
S2W
Formula Weight
247.97
MOL File
12138-09-9.mol
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TUNGSTEN SULFIDE Property

Melting point:
1480 °C
Density 
7.5 g/mL at 25 °C(lit.)
RTECS 
YO7716000
solubility 
insoluble in H2O, HCl, alkaline solutions
form 
powder
color 
Dark gray
Specific Gravity
7.5
Water Solubility 
Slightly soluble in water.
Crystal Structure
MoS2 type
crystal system
Six sides
Space group
P63/mmc
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.315320.315321.232390901200.1061
Exposure limits
ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
CAS DataBase Reference
12138-09-9(CAS DataBase Reference)
EPA Substance Registry System
Tungsten sulfide (WS2) (12138-09-9)
Bandgap
1.4 - 2.01 eV
Electronic properties
2D semiconductor
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-37/39
WGK Germany 
-
TSCA 
Yes
HS Code 
28291900
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
914290
Product name
Tungsten disulfide quantum dots
Packaging
20ML
Price
$197
Updated
2024/03/01
Sigma-Aldrich
Product number
914290
Product name
Tungsten disulfide quantum dots
Packaging
50ML
Price
$386
Updated
2024/03/01
Sigma-Aldrich
Product number
790583
Product name
Tungsten(IV) sulfide
Purity
nanopowder, 90 nm avg. part. size (SEM), 99% trace metals basis
Packaging
5g
Price
$102
Updated
2024/03/01
Sigma-Aldrich
Product number
243639
Product name
Tungsten(IV) sulfide
Purity
powder, 2 μm, 99%
Packaging
50g
Price
$95.5
Updated
2024/03/01
Sigma-Aldrich
Product number
901474
Product name
Tungsten sulfide
Purity
single crystalline monolayer flakes on sapphire
Packaging
1EA
Price
$391
Updated
2023/06/20
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TUNGSTEN SULFIDE Chemical Properties,Usage,Production

Description

Tungsten sulfide (S2W) is a chemical compound that exists naturally in the form of a rare mineral called tungstenite. It is used as a principal component of catalysts in processes such as hydrogenation of crude oil, hydrodesulfurization and hydrodenitrification reactions. It is widely employed as additives in solid lubricants to improve lubricants and extreme pressure properties and antiwear properties especially in environments of high temperature, high pressure, high vacuum, high load and with radiation and corrosive media. Due to the above property, the nanoscale of tungsten sulfide can be also added in the casting process which helps make cast metal have a certain self-lubricating properties and have an excellent adsorption capacity on the metal surface. It can also be used as solid-state secondary lithium battery cathodes and other electrochemical devices. Besides, it is found that the friction coefficient of tungsten sulfide is relatively small, which makes it an additive in other metal powder for a stable friction coefficient. It also finds application in semiconductor materials, inorganic nanotubes, etc.

Uses

Tungsten disulfide (WS2) in bulk has been used for many years as a dry lubricant due to how it exhibits properties of a low coefficient of friction, high chemical stability, and thermal stability. In 1992, it was discovered that the structure of WS2 made it capable of forming nanotube structures. These nanotubes were the first examples of WS2 being used as a low-dimensional material.
After the discovery of simple mechanical exfoliation techniques to isolate single layers of 2-D materials, it was possible to study the properties of WS2 flakes. It was shown that, just like MoS2, the band-gap of WS2 change from an indirect band-gap of 1.4eV to a direct band-gap of 2eV when changing from a bulk material to a 2-D material. Due to its band-gap, WS2 is seen as a significantly interesting material for many areas of application.
WS2 possesses a high on/off ratio in field-effect transistors, controllable spin and valley polarisation, strong geometrical confinement of excitons, and tunable photoluminescence. Additionally, WS2 could lead to increased interest in areas such as photodetectors and multi-junction photovoltaics.
Besides, WS2 is used, in conjunction with other materials, as catalyst for hydrotreating of crude oil.
Lamellar tungsten disulfide is used as a dry lubricant for fasteners, bearings, and molds under the brand name Dicronite.

References

https://en.wikipedia.org/wiki/Tungsten_disulfide
https://www.alfa.com/zh-cn/catalog/011829/
http://www.us-nano.com/inc/sdetail/1030
http://www.azonano.com/article.aspx?ArticleID=3360

Application

Due to its distinctive electron configuration and high specific surface area, few-layer tungsten disulfide nanosheets have potential applications in electrodes and energy storage devices, supercapacitors, and photoelectrochemical cells as a catalyst for hydrogen evolution reactions (HERs). With?tunable electromagnetic absorption, it has practical applications?against electromagnetic pollution. WS2?is also a great potential candidate in photothermal therapy for the ablation of cancer cells, when NIR light is absorbed and converted into heat.

Synthesis

High-quality tungsten disulfide monolayer?films?are grown directly on the substrates (sapphire) by? the chemical vapour deposition (CVD) method.

Description

Few-layer?tungsten disulfide (WS2) film has a 2D-layered structure with a narrow indirect bandgap of of 1.35 eV. In contrast, the monolayer film possesses a direct bandgap of 2.1 eV.

Preparation

Synthetic?- Chemical Vapour Transport (CVT)

Chemical Properties

Grayish-black solid. Mp above 1480C, can lubricate at temperatures above 2400F (1316C). Attacked by fluorine and hot sulfuric and hydrogen fluoride.

Uses

Tungsten disulfide (WS2) is used as a solid lubricant that can withstand high temperatures. It is also used as a spray lubricant.

Uses

Tungsten sulfide is used as a component of catalysts for hydrotreating of crude oil, hydrodesulfurization and hydrodenitrification reactions. It finds application as solid-state secondary lithium battery cathodes and other electrochemical devices. It is found that it forms inorganic nanotubes, which is better reinforcing agents than carbon nanotubes. Tungsten sulfide addition to epoxy resin improves adhesion, fracture toughness and strain energy release rate.

Uses

Tungsten sulfide possesses a pseudo 2 dimensional structure with applications in the Petrochemical industry as a desulfurization catalyst. Tungsten Sulfide nanoparticles have drawn research interest due to their potential in solid-state lubricants; coatings and photocatalysts.

Definition

ChEBI: Tungsten disulfide is a sulfide salt.

Flammability and Explosibility

Not classified

TUNGSTEN SULFIDE Preparation Products And Raw materials

Raw materials

Preparation Products

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TUNGSTEN SULFIDE Suppliers

Nanjing XFNano Material Tech Co., Ltd
Tel
025-68256996 15261867733
Email
sale@xfnano.com
Country
China
ProdList
271
Advantage
60
ZHEJIANG YAMEI NANO TECHNOLOGY CO., LTD.
Tel
400-8200386 13456373028
Fax
0573-84615678
Email
2533928531@qq.com
Country
China
ProdList
321
Advantage
58
BROFOS NANOTECHNOLOGY(NINGBO)CO ,LTD.
Tel
0574-62615397 17757424292
Email
brofosnano@foxmail.com
Country
China
ProdList
162
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
Advantage
84
Beijing HwrkChemical Technology Co., Ltd
Tel
010-89508211 18501085097
Fax
010-89508210
Email
sales.bj@hwrkchemical.com
Country
China
ProdList
8418
Advantage
55
Energy Chemical
Tel
021-021-58432009 400-005-6266
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
44688
Advantage
61
Shanghai Hanhong Scientific Co.,Ltd.
Tel
021-54306202 13764082696
Email
info@hanhongsci.com
Country
China
ProdList
42958
Advantage
64
Shandong Xiya Chemical Co., Ltd
Tel
4009903999 13355009207
Fax
0539-6365991
Email
3007715519@qq.com
Country
China
ProdList
18738
Advantage
57
Connect Chemicals GmbH
Tel
+49 2102 2077 19
Fax
+49 2102 2077 40
Email
Martin.Klapper@connectchemicals.com
Country
Germany
ProdList
404
Advantage
62
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View Lastest Price from TUNGSTEN SULFIDE manufacturers

Hubei Lidu New Material Technology Co., Ltd
Product
TUNGSTEN SULFIDEv 12138-09-9
Price
US $0.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
20tons
Release date
2024-10-30
Shanghai MaiNo material technology Co.Ltd
Product
Tungsten Disulfide 12138-09-9
Price
US $0.00/kg
Min. Order
1kg
Purity
99%>=
Supply Ability
100kg
Release date
2024-08-07
Hebei Weibang Biotechnology Co., Ltd
Product
TUNGSTEN SULFIDE 12138-09-9
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
500000kg
Release date
2024-10-30

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