Recently, the experts have proposed a preparation method for preparing new yellow tungsten oxide photocatalytic material. The method is easy to operate, easy to obtain raw materials, and easy to popularize in low cost.
More details, please visit:
http://tungsten-oxide.com/index.html
A Preparation Method of New Yellow Tungsten Oxide Photocatalytic Material
Step One: Dissolve Na2WO4·H2O2 in deionized water and stir magnetically for 10-30min to obtain a uniform and transparent solution.
Step Two: Add HCl to the solution prepared in Step One, and magnetically stir for 30min-1h to obtain the pale yellow precipitate.
Step Three: Wash the precipitate prepared in Step Two.
Step Four: Dissolve the washed precipitate in 10-30 ml of H2O2 solution (wt%: 30%), and magnetically stir to obtain a uniform and transparent solution.
Step Five: The solution obtained in Step Four is transferred to a high-pressure reaction kettle and placed in an oven for a hydrothermal reaction at the temperature range of 120-180 °C for 6-24 h. After the reaction is completed, it is naturally cooled to room temperature.
Step Six: Centrifuge and wash the precipitate obtained in Step Five with deionized water and anhydrous ethanol 3-5 times at speed of 3000-8000 r/min for 5-15min.
Step Seven: The product obtained in Step Six is transferred to an oven and dried at 50-90 °C for 10-30h to obtain a new yellow tungsten oxide photocatalytic material that can efficiently photocatalytically degrade organic dyes.
