Vanadium(V) oxide

• Vanadium pentoxide
• Divanadium pentoxide
• Vanadium pentaoxide
• Divanadium pentaoxide

Yellow to reddish-brown, odorless solid

Fixed

3.36 g · cm -3

690 ° C.

1750 ° C. (decomposition)

• Insoluble in water
• Significantly soluble in alkalis, acids and ethanol

Risk

10 mg · kg -1 ( LD50, rat, oral)

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Vanadium ( V) oxide is the most stable vanadium compound with the element oxygen.

Representation

Vanadium ( V) oxide can be produced directly from the elements.

It can also be prepared by annealing of ammonium metavanadate NH4VO3 at 500-550 ° C in air.

Properties

Vanadium ( V) oxide is a solid, vanadium ions are in the crystal structure in the octahedral interstices of a close packing of oxygen ions. Each vanadium ion is surrounded by five oxygen ions form a distorted trigonal bipyramid is formed.

Use

Vanadium ( V) oxide is utilized as catalyst in the production of sulfuric acid by the contact process. Moreover, it will find use in the preparation of steel alloys, such as ferro- vanadium. It is used among other things as a catalyst in the flue gas cleaning in waste incineration plants and for lowering the melting point in the enamel production. Vanadium pentoxide is a toxic hazardous material.

Vanadium ( V) oxide is also used to make white glass impermeable for UV light. There is added to the glass melt, the finished glass is coated by either the outside or from the inside. Bottles made of this glass are mainly used for beer, to avoid the light taste.

Nanostructured vanadium ( V) oxide, in combination with water, a composite material, which is referred to as " ceramic paper." This " ceramic paper " has excellent mechanical properties and is electrically conductive. Possible applications are, therefore, batteries, gas sensors and artificial muscles.