Nano particle size tungsten trioxide may be used to prepare a smart window, that is, an electrochromic window or an energy-saving window, which has excellent properties such as heat insulation, anti-glare and anti-ultraviolet, so such window glass is more and more widely applied in building, and it is also more and more popular with people.
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Therefore, more and more experts and scholars have begun to study the electrochromic properties of tungsten trioxide nano particles. For example, some experts have prepared a tungsten trioxide and Prussian blue complementary all-solid smart window using a room temperature high ionic conductivity polymethyl methacrylate (PMMA) gel electrolyte. The electrochromic smart window showed good electrochromic and memory properties. X-ray photoelectron spectroscopy showed that the W4+ and the W5+ and the W6+ coexist in the tungsten bronze type compound. The polymethyl methacrylate-based gel electrolyte preparation method is simple so that it can be expected to be widely applied in the production of heat insulation glass.
