Wolframdisulfid

Bezeichnung:Wolframdisulfid

CAS-Nr12138-09-9

Englisch Name:TUNGSTEN SULFIDE

CBNumberCB9239043

SummenformelS2W

Molgewicht247.97

MOL-Datei12138-09-9.mol

Synonyma

Wolframdisulfid

Wolframdisulfid physikalisch-chemischer Eigenschaften

Schmelzpunkt

1480 °C

Dichte

7.5 g/mL at 25 °C(lit.)

RTECS-Nr.

YO7716000

Löslichkeit

insoluble in H2O, HCl, alkaline solutions

Aggregatzustand

powder

Farbe

Dark gray

Wichte

7.5

Wasserlöslichkeit

Slightly soluble in water.

Crystal Structure

MoS2 type

crystal system

Six sides

Space group

P63/mmc

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.31532	0.31532	1.2323	90	90	120	0.1061

Expositionsgrenzwerte

ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3

CAS Datenbank

12138-09-9(CAS DataBase Reference)

EPA chemische Informationen

Tungsten sulfide (WS2) (12138-09-9)

Bandgap

1.4 - 2.01 eV

Electronic properties

2D semiconductor

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-37/39
WGK Germany	-
TSCA	Yes
HS Code	28291900

Gefahreninformationscode (GHS)

TUNGSTEN SULFIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung
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.
synthetische
Synthetic?- Chemical Vapour Transport (CVT)
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.
Synthese

High-quality tungsten disulfide monolayer?films?are grown directly on the substrates (sapphire) by? the chemical vapour deposition (CVD) method.
R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
Grayish-black solid. Mp above 1480C, can lubricate at temperatures above 2400F (1316C). Attacked by fluorine and hot sulfuric and hydrogen fluoride.
Verwenden
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.
Verwenden
Tungsten disulfide (WS2) is used as a solid lubricant that can withstand high temperatures. It is also used as a spray lubricant.
Verwenden
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 Upstream-Materialien And Downstream Produkte

Wolframdisulfid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

12138-09-9, TUNGSTEN SULFIDE Verwandte Suche:

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