Synthesis method of phosphoric acid bridged and compounded TiO2-BiVO4 nanometer photocatalyst

[0019] Specific implementation mode 1: In this implementation mode, phosphate bridged composite TiO 2 -BiVO 4 The synthetic method of nano photocatalyst is carried out according to the following steps:

[0020] 1. Disperse 1 g of bismuth vanadate into an aqueous phosphoric acid solution with a concentration of 0.001 to 0.01 mol / L, then stir and evaporate to dryness under the condition of heating in a water bath at 80°C, grind, roast at 450°C for 0.5h, and grind to obtain phosphoric acid-modified bismuth vanadate;

[0021] Two, the phosphoric acid-modified bismuth vanadate obtained in step 1 is dispersed in the mixed solution that is made up of 20ml ethanol and 5ml distilled water, drips 0.5~2ml mass concentration under stirring condition and is the nitric acid of 65%, stirs 0.5h, Obtain solution A;

[0022] 3. Disperse 0.01-0.1ml of butyl titanate into 2ml of absolute ethanol and stir for 30min to obtain solution B;

[0023] 4. Add solution B obtained in step 3 dropwise to...

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of the phosphoric acid aqueous solution in step 1 is 0.002-0.009 mol / L. Others are the same as in the first embodiment.

[0027] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the concentration of phosphoric acid aqueous solution in step 1 is 0.003-0.008 mol / L. Others are different from the first or second specific embodiment.