Tungsten trioxide is an important material for obtaining an electrochromic film. And the prepared electrochromic film is promising for smart window applications. Therefore, the preparation of WO3 film attracted much attention. According to the experts, there are various conventional deposition methods for fabricating WO3 film, including direct current, radio frequency, magnetron sputtering, sol–gel methods, plasma spraying method, electron beam evaporation, thermal evaporation, and hydrothermal methods.

Mo-doped tungsten bronze nanorods are well-known as an electrochromic material with selective absorption of light, so they are often used to prepare electrochromic film. Then, how to prepare such a thin film?

Tungsten oxide is often used to prepare a new type of energy saving coating because of its excellent optical properties. The obtained transparent heat-insulating coating is environmentally-friendly, safe, and non-toxic.

Tungsten oxide for preparing water-based glass thermal insulation coating is selected from high-purity tungsten oxide nano powder - a new type of nano heat insulation medium. Some experts have developed robust super hydrophobic tungsten oxide coating with a water contact angle of 155° for photochromism via a facile and substrate-independent route.