Blue Tungsten Oxide XPS

blue tungsten oxide picture
blue tungsten SEM image Inquiry & Feedback

Blue tungsten oxide (BTO) is reduced by ammonium bromide at 390-430℃. The so-called blue tungsten oxide does not have a unified molecular formula, which can be written in WO2.9.

From X-ray photoelectron spectrum (XPS) can analyze the surface of the valence of blue tungsten oxide. Reducing of oxygen causes W5+ and W6+ valences of blue tungsten oxide. With the temperature rising and the oxygen content decreasing, W6+ tungsten oxide decreases and blue tungsten oxide change from deep blue to violet blue. W4+ tungsten oxide appears in the photoelectron spectrum at 32.6 eV of the peak.

XPS is a technology using information of photoelectron intensity and electrons angular distribution to study the electronic structure of atomic, molecular and condensed phase, especially solid surface.

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APT

Ammonium Paratungstate

Ammonium paratungstate (APT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, insoluble in water, soluble in alcohol and ether.
ammonium metatungstate

Ammonium Metatungstate

Ammonium metatungstate(AMT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, solubility in water is the largest in the tungsten compounds which over 300g WO3/100ml H2O (in 25℃).
sodium tungstate

Sodium Tungstate

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tungstic acid

Tungstic Acid

Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3.H2O, the dihydrate WO3.2H2O is also known. The solid state structure of WO3. H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.
yellow tungsten oxide

Yellow Tungsten Oxide

Yellow tungsten oxide is a finely divided, yellow crystalline powder. It is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off water and ammonia. Exact time and temperature control determine, to a large extent, the physical characteristics of yellow tungsten oxide.
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Cesium Tungsten Bronze

Cesium tungsten bronze is inorganic nano material with good property in absorbing near-infrared with uniform grain size and dispersibility, it has strong absorbing function in near-infrared area with wave length 800~1200nm, also has high transmittance in visible light area with wave length 380~780nm.