Tungsten Trioxide Film Applied for FTO Conductive Glass

The tungsten trioxide film prepared on the FTO conductive glass has excellent photochromic property and electrochromic property. Some experts have produced such a WO3 electrochromic film. Specifically, the preparation method is as follows:

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Weigh 0.7mmol Na2WO4.2H20, dissolve it in 30mL deionized water, add 6mL 3MHCl solution dropwise at room temperature with stirring, stir until white precipitate no longer increases; add 1.6mmol (NH4)2C2O4 as a structure guiding agent, add the ionized water to the solution until the total volume was 70mL, and stirring for 0.5h. The pre-cleaned FTO conductive glass was tilted into the reactor lining. The solution was transferred to a reaction vessel, sealed, placed in a blast drying oven, and hydrothermally reacted at 80°C for 30h, naturally cooled to room temperature. The conductive glass was taken out, washed with deionized water, dried in an oven at 60°C, and calcined at 400°C for 4h to obtain a tungsten trioxide electrochromic film.

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