A Preparation Method of Yellow Tungsten Oxide

Yellow tungsten oxide, which is also known as tungsten trioxide or WO3, has huge application prospects in smart windows, photocatalysts, gas sensors, etc., so its preparation methods have always been one of the key research directions of researchers. There are many methods for preparing tungsten trioxide, such as hydrothermal method and template method. Here is a preparation method of tungsten trioxide.

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A Method for Preparing Yellow Tungsten Oxide

Using sodium tungstate as the source of tungsten, the pH value of the solution was adjusted with hydrochloric acid, and the formaldehyde solution was added dropwise under stirring, and then it was transferred to a 100 mL hydrothermal kettle for hydrothermal reaction for 2 days at a temperature of 100 °C. The reaction product was repeatedly washed with distilled water and absolute ethanol, suction filtered, and finally placed in a vacuum drying oven at 80 °C for vacuum drying to obtain yellow tungsten oxide powder with a hexagonal phase.

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