How to Prepare Yellow Tungsten Oxide Photocatalytic Material?

How to prepare yellow tungsten oxide photocatalytic material? The researchers successfully prepared hexagonal WO3 photocatalytic materials by a simple hydrothermal method.

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Preparation of Yellow Tungsten Oxide Photocatalytic Material

Step 1: Add 3mm Na2WO4·H2O2 to a 50ml beaker, add 15ml of deionized water to dissolve, and magnetically stir for 20min to obtain a uniform and transparent solution;

Step 2: Prepare a 3mm dilute HCl solution, add 5ml of HCl solution dropwise to the solution prepared in Step 1, and magnetically stir for 1h to prepare a pale yellow precipitate;

Step 3: Centrifugally wash the precipitate prepared in Step 2 with deionized water for 3 times. Wherein, centrifugal speed was 4000 r/min, and single centrifugation time was 10min;

Step 4: Dissolve the precipitate washed in Step 3 in 15 ml of H2O2 with a mass fraction of 30%, and magnetically stir for 1 h to prepare a uniform and transparent solution;

Step 5: Transfer the solution to a 50ml polytetrafluoroethylene-lined hydrothermal reaction kettle and place it in a constant temperature drying box for hydrothermal reaction, at a temperature of 160 °C for 12h, reaction completed, naturally cooled to room temperature;

Step 6: Centrifugally wash the precipitate prepared in Step 5 with deionized water and absolute ethanol; three times with deionized water, twice with anhydrous ethanol. The centrifugal speed was 4000 r/min. The time is 10min;

Step 7: Place the centrifuged product in a drying oven for drying at a temperature of 80 °C for 24 h to obtain a white hexagonal yellow tungsten oxide photocatalytic material.

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