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TUNGSTEN SULFIDE

Description Uses References
TUNGSTEN SULFIDE
TUNGSTEN SULFIDE structure
CAS No.
12138-09-9
Chemical Name:
TUNGSTEN SULFIDE
Synonyms
EASCHEM;Tungsten sulfid;Wolframdisulfid;TUNGSTEN SULFIDE;ungstendisulfide;TUNGSTEN DISULFIDE;Tungsten bisulfide;tungsten disuIlfide;tungsten disulphide;Wolfram(IV)disulfide
CBNumber:
CB9239043
Molecular Formula:
S2W
Formula Weight:
247.97
MOL File:
12138-09-9.mol

TUNGSTEN SULFIDE Properties

Melting point:
1480 °C
Density 
7.5 g/mL at 25 °C(lit.)
RTECS 
YO7716000
form 
powder
color 
Dark gray
Specific Gravity
7.5
Water Solubility 
Slightly soluble in water.
CAS DataBase Reference
12138-09-9(CAS DataBase Reference)
EWG's Food Scores
1
EPA Substance Registry System
Tungsten sulfide (WS2) (12138-09-9)
Bandgap
1.4 - 2.01 eV
Electronic properties
2D semiconductor
Odor
Transparent
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-37/39
WGK Germany  -
TSCA  Yes
HS Code  28291900
NFPA 704
0
1 0

TUNGSTEN SULFIDE price More Price(11)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 790583 Tungsten(IV) sulfide nanopowder, 90 nm avg. part. size (SEM), 99% trace metals basis 12138-09-9 5g $82.1 2021-12-16 Buy
Sigma-Aldrich 243639 Tungsten(IV) sulfide powder, 2 μm, 99% 12138-09-9 50g $77.1 2021-12-16 Buy
Alfa Aesar 011829 Tungsten sulfide 99.8% (metals basis) 12138-09-9 50g $78 2021-12-16 Buy
Alfa Aesar 011829 Tungsten sulfide 99.8% (metals basis) 12138-09-9 250g $256 2021-12-16 Buy
Strem Chemicals 93-7424 Tungsten(IV) sulfide (99.5%-W) 12138-09-9 250g $267 2021-12-16 Buy

TUNGSTEN SULFIDE Chemical Properties,Uses,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

Chemical Synthesis

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

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.

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.

TUNGSTEN SULFIDE Preparation Products And Raw materials

Raw materials

Preparation Products


TUNGSTEN SULFIDE Suppliers

Global( 145)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com China 22607 55
career henan chemical co
+86-0371-55982848
sales@coreychem.com China 29954 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28229 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23035 58
Chongqing Chemdad Co., Ltd
+86-13650506873
sales@chemdad.com CHINA 37282 58
Hebei Xibaijie Biotechnology Co., Ltd.
0086 15232103582
aiana@hbxibaijie.com CHINA 636 58
Fuxin Pharmaceutical
021-50872116
contact@fuxinpharm.com CHINA 10305 58
SINOPRO.CO.LTD
0082-42-721-7177
0082-42-3676760 michael@sinopro.co.kr South Korea 300 58
Hefei TNJ Chemical Industry Co.,Ltd.
0551-65418671
0551-65418697 sales@tnjchem.com CHINA 37441 58
Connect Chemicals GmbH
+49 2102 2077-39
+49 2102 2077-40 inquiries@connectchemicals.com Germany 265 58

View Lastest Price from TUNGSTEN SULFIDE manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-07-09 EASCHEM
12138-09-9
US $100.00 / KG 1KG 99.9% 100 Ton/Tons per Month Tungsten Disulfide Hebei Xibaijie Biotechnology Co., Ltd.
2019-07-06 TUNGSTEN SULFIDE
12138-09-9
US $1.00 / kg 1kg 99% Customized Career Henan Chemical Co

TUNGSTEN SULFIDE Spectrum


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