Tungsten oxide photocatalyst mainly use WO₃ as raw material, it can be applied in air purification, anti-fog and self cleaning, anti-baterial.

Ammonium paratungstate (APT) can produce ammonium metatungstate, yellow tungsten oxide and blue tungsten oxide by thermal decomposition.

Nano tungsten trioxide is tungsten trioxide with grain size less than 100nm, it has larger specific surface area and can be produced by solid phase reaction method, it has strong magnetic absorption ability, catalytic property and gas sensitivity.

Although gold plated tungsten bar can be regarded as gold substitution, their manufacturer processes are quite different.