Mo-doping WO3 electrochromic film may be applied in smart windows for heat insulation, that is, for energy conservation and environmental protection. So, with the promotion of the application prospect of doped tungsten trioxide in the field of smart windows, more and more experts have shown great interest in this electrochromic material.

Tungsten trioxide nanosheet can be used to prepare electrochromic film, which may be applied to building smart windows to save energy and reduce consumption. That is to say, WO3 nano particles have good thermal insulation effect that everyone cares about.

Mo-doping WO3 nanoparticles film, which may be applied in window glass for high heat insulation effect, can be prepared by the following steps: prepare the reaction precursor liquid; prepare the water-based Mo-doped WO3 nanoparticle ink; prepare the WO3 electrochromic film by spraying.

Hydrated WO3 nanosheet can be prepared by a simple, green solution process of high quality, and the prepared WO3 can be used to prepare flexible electrochromic electrode, i.e., electrochromic film, by low pressure electrodeposition method. And the obtained WO3 electrochromic film has good thermal insulating performance for applying in building window glass or car window glass.