Tungsten Trioxide Nanometer Array Applied for FTO Conductive Glass

The expert introduced a preparation method of tungsten trioxide nanometer array FTO conductive glass. The specific steps are as follows:

tungsten trioxide nanometer array applied for FTO conductive glass image

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Step one: Ultrasonic cleaning of FTO conductive glass with acetone, deionized water and ethanol for 10min, and blowing clean with N2 to obtain clean FTO conductive glass;

Step two: An excess of 12mol/L of concentrated hydrochloric acid was dropped into a 0.5mol/L aqueous solution of sodium tungstate until no new precipitate was produced, and the precipitate was washed with deionized water to obtain a milky white to pale yellow gelatinous precipitate. The gelatinous precipitate is white tungstic acid, which is dissolved in 40% aqueous hydrogen peroxide solution, the molar ratio of white tungstic acid to hydrogen peroxide in aqueous hydrogen peroxide is 1:5. The deionized water was added to prepare tungsten with a concentration of 2mol/L, which is refrigerated at 4°C for use;

Step three: Rotate the solution prepared in step two with a spin coater at a speed of 4000r/min on the conductive surface of the clean FTO conductive glass for 20s, and then put it into a 200°C box furnace. After 15 minutes of heat preservation, repeating spin coating five times to obtain FTO conductive glass covered with a seed layer;

Step four: Add hexacarbonyl tungsten to 70ml of absolute ethanol solution to obtain a precursor solution with a concentration of 0.001mol/L of hexacarbonyl tungsten, and adding 5mL of 10mol/L hydrochloric acid;

Step five: Adopt the FTO conductive glass covered with seed layer in step three as the base, erecting the substrate vertically and fixing in the reactor Teflon liner, and then pour the precursor solution prepared in step four into the reaction kettle, the reaction kettle was heated at 150°C in a constant temperature chamber for 16h. After that, it was taken out from the reaction vessel, cooled with tap water, then rinsed with deionized water, vacuum dried, and then carried out by heat treatment at 450°C in a box furnace for 1h to obtain WO3 nano array electrochromic film.

 

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