Defective tungsten oxide can be used as a photothermal conversion material for applications of solar power generation, seawater desalination and sewage treatment. Well, do you know how to prepare defective tungsten oxide?
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A Method of Preparation of Defective Tungsten Oxide
Add 1 mmol of sodium tungstate dihydrate, 1.5 mmol of citric acid and 5 mmol of glucose gradually to 30 mL of deionized water, place in a 100 mL beaker, and stir magnetically for 10 min to obtain a colorless transparent solution; add HCl dropwise to adjust the pH value of the transparent solution to 0.3, and continue to stir magnetically for 30 min to obtain a light yellow solution; place the light yellow solution in a 50 mL polytetrafluoroethylene lining, and put it into a stainless steel reactor for hydrothermal reaction at 120 °C for 24h, naturally cooled to room temperature; then wash the obtained product with deionized water and absolute ethanol, and dry to prepare an oxygen-deficient hydrated tungsten oxide precursor; take 50 mg of the obtained hydrated tungsten oxide precursor in a magnetic boat and put it into a tube furnace, heated to 550 °C in an air atmosphere, calcined for 3 h, and cooled to room temperature to obtain defective tungsten oxide.
