Analytical Grade Blue Tungsten Oxide

Analytical grade blue tungsten oxide may be applied in important analytical experiments and general research.

Photoelectron Spectroscopy of Blue Tungsten Oxide

Photoelectron spectroscopy was used to study the surface of the valence of blue tungsten oxide. The results show that:

1. The blue tungsten oxide is not a type of tungsten oxide with single valence state, but consists of two valence states, W+5 and W+6.

2. 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.

3. Hydrogen ion etching and high-temperature treatment in a vacuum are all reduction processes, and it is also a transition of tungsten from high valence state to low valence state. At the same time, the density of states near the Fermi level gradually increases as the valence becomes lower.

Photoelectron spectroscopy is a technology using information of photoelectron kinetic energy, photoelectron intensity and electrons angular distribution to study the atoms, molecules and condensed phases, especially electronic structure of solid surface.

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