Tungsten oxide nano-urchins are paid much attention due to good electrochromic performance. You know, tungsten oxide as an inorganic electrochromic material has attracted considerable attention as it is promising in applications of electrochromic glass - energy-saving smart glass having high shielding performance to near-infrared rays and high transmittance to visible light.

It has been reported that amorphous tungsten oxide thin film has good optical absorption to shield near-infrared rays, thereby reducing room temperature in hot summer and saving powder rate for cooling the room by using air conditioners or fans. Some experts have investigated the electrochromic color centers of amorphous tungsten oxide thin film by the Raman scattering method.

W18O49 is an important material for fabricating infrared-shielding film, to sufficiently transmit visible rays and shield invisible near-infrared rays. Some experts prepared W18O49 powder by heating a mixture containing a predetermined amount of a tungsten compound at 550 °C in a reductive atmosphere for 1 h, then cooled to room temperature once in an argon atmosphere.

Sputtered tungsten trioxide, more specifically, sputtered WO3 film, may be applied as a photoelectrode to obtain high solar-to-hydrogen efficiency. Some experts have prepared tungsten oxide film with a dense, compact morphology at a temperature lower than 250 °C by reactive sputtering from tungsten targets in an argon/oxygen ambient in the context of photoelectrochemical water-splitting.