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Nov. 2018/11/1 16:17:13 By LEAP Chem


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Basic Information of Tungsten trioxide

Chemical Name: Tungsten trioxide

Cas No.: 1314-35-8

Molecular Formula: WO3

Chemical Structure:

 1314-35-8.jpg

 

Tungsten(VI) oxide, also known as tungsten trioxide or tungstic anhydride, WO3, is a chemical compound containing oxygen and the transition metal tungsten. It is obtained as an intermediate in the recovery of tungsten from its minerals. Tungsten ores are treated with alkalis to produce WO3. Further reaction with carbon or hydrogen gas reduces tungsten trioxide to the pure metal.

Tungsten trioxide is used for many purposes in everyday life. It is frequently used in industry to manufacture tungstates for x-ray screen phosphors, for fireproofing fabrics and in gas sensors. Due to its rich yellow color, WO3 is also used as a pigment in ceramics and paints.

In recent years, tungsten trioxide has been employed in the production of electrochromic windows, or smart windows. These windows are electrically switchable glass that change light transmission properties with an applied voltage. This allows the user to tint their windows, changing the amount of heat or light passing through.

2010- AIST reports a quantum yield of 19% in photocatalytic water splitting with a caesium-enhanced tungsten oxide photocatalyst.

In 2013, highly photocatalytic active titania/tungsten (VI) oxide/noble metal (Au and Pt) composites toward oxalic acid were obtained by the means of selective noble metal photodeposition on the desired oxide's surface (either on TiO2 or on WO3). The composite showed a modest hydrogen production performance.

In 2016, shape controlled tungsten trioxide semiconductors were obtained by the means of hydrothermal synthesis. From these semiconductors composite systems were prepared with commercial TiO2. These composite systems showed a higher photocatalysis activity than the commercial TiO2 (Evonik Aeroxide P25) towards phenol and methyl orange degradation.

 

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References:

https://en.wikipedia.org/wiki/Tungsten_trioxide

https://www.ncbi.nlm.nih.gov/pubmed/25365299

https://www.ncbi.nlm.nih.gov/pubmed/21970978

 

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