WO3 nanopowder is an n-type semiconductor with wide extending applications. For example, nano WO3 is widely applied to produce functional ceramic. And the prepared functional ceramics show good nonlinear electrical properties characterized by low voltage and small current. Some experts have used nano WO3 and CeO2 powders to prepare CeO2 doped WO3 ceramics to study the effect of initial powder nanometerization on ceramic properties.

WO3, or tungsten trioxide, is a functional material with a wide range of applications. Tungsten trioxide has been systematically studied in areas such as electrochromism, detection of toxic gas, and photochemical catalysis.

WO3 hollow-sphere, as a typical n-type semiconductor, has good sensitivity to alcohol, acetone, CS2, and other organic gases, so it is regarded as the most important sensing material for fabricating highly sensitive gas sensor. Some experts have prepared WO3 hollow spheres in solution phase by the controlled hydrolysis of WCl6 using novel carbon microspheres as the templates.

Nanoblock WO3 is related to the concept of electrochromism. More precisely, Nanoblock WO3 has an electrochromic effect, which can change color under the action of an external electric field. According to the experts, the reason why nano WO3 has an electrochromic effect is due to the surface effect of the nanomaterials, which makes the oxygen ions on the surface of WO3 grains have high activity and can migrate in the sample, and tungsten ions can be combined or separated with electrons under the action of an external electric field, so that the sample changes color with external voltage.