Tungsten Trioxide Nanoparticles Applied for Energy Efficient Building Glass

Tungsten trioxide nanoparticles may be applied for producing energy efficient building glass. The prepared building glass is a type of smart glass. The raw material WO3 nano powder is a transition metal oxide. Nano particle size WO3 is also a cathodic electrochromic material. So, what is the electrochemical reaction of the cathodic electrochromic material?

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MOx (bleached state) + yA++ye-←→AyMOx (colored state) (0≤y≤1)

In the formula, A+ is a positive ion injected or extracted (such as H+, Li+, and Na+, etc.). When A+ is implanted into MOx, the film changes from a colorless state to a colored state AyMOx.

In addition, according to experts, the WO3 nanopowder raw material can be prepared by a solvothermal method. In the synthesis process of nanomaterials, since the reaction temperature tends to be higher than the boiling point of the organic solvent in the solvothermal synthesis, the solvent in the reactor is vaporized when the reaction temperature rises above the boiling point of the solvent during the temperature rising process. The interior of the entire reactor is in a high pressure state, which provides power for the occurrence of a solvothermal reaction, promotes interdiffusion between reactants, and thereby increases the nucleation rate of the reaction.

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