Method for Preparing Tungsten Trioxide Nano Material

The present invention discloses a tungsten trioxide nanomaterials preparation.

The first step is to tungsten metal sheet is placed under stirring, deionized water or distilled water, and then with a wavelength of 532nm or 1064nm, a pulse width of 5 ~ 15ns, a repetition rate of 1 ~ 20Hz, single pulse energy of 50 ~ 120mJ laser irradiating at least a tungsten film 10min, tungstic acid colloidal solution obtained, followed, tungstic acid colloid solution to the aging process or to, at least 24h tungstic acid colloid solution was added acid to adjust the pH of -0.6 to 3.0, to give a yellow precipitate, or Tungsten metal sheet placed on the first stirred with the same acid solution pH value, and then use the same wavelength, pulse width, repetition rate, pulse energy of the laser irradiation tungsten film, to give a yellow precipitate, after which the first of yellow precipitate was centrifuged and washed, to give the tungstic acid, tungstic acid and then placed in 480 ~ 520 ℃ annealing at least 1h, tungsten trioxide obtained nanomaterials. It is available in a wide range on the morphology and size of effective regulation.




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