As a new energy-saving material, paraffin wax-Cs0.32WO3 composite material combines the advantages of cesium tungsten bronze and paraffin wax. Wherein, Cs0.32WO3 has excellent near-infrared shielding performance and high visible light transmittance; and the phase change material paraffin wax can absorb or release heat to achieve the purpose of calming sudden changes in ambient temperature.

Nano tungsten oxide is well-known as a new type of heat insulation medium or functional nanomaterial, which is often used to prepare sunroom heat insulation coating. The obtained transparent heat-insulating coating could achieve good heat shielding effect without affecting the transmittance of visible light. Therefore, nano tungsten oxide is attracting much attention as WO3 coating is the development trend of heat insulation industry in the future.

Tungsten bronze nanomaterial for assembling the electrochromic device may be Mo-doped tungsten bronze nanorods organic-inorganic composite film, Fe-doped tungsten bronze nanorods organic-inorganic composite film, Cu-doped tungsten bronze nanorods organic-inorganic composite film or tungsten bronze nanorods/titanium dioxide nanoparticles inorganic electrochromic film.

WO3 smart glass has an important application in energy-saving building as it can effectively save energy by regulating the solar heat gain and providing indoor comfort through reversible color changes. Wherein, WO3 is prepared into a thin film and is used as an electrochromic layer for the fabrication of such a smart glass. So, WO3 is known to be more attracting to researchers.