Composite nano photocatalytic material as well as preparation method and application thereof

[0024] SiO used in the present invention 2 through improved Prepared, please refer to the paper for details: Feng Li, Structural Chromogenic and Photocatalytic Bifunctional SiO 2 @TiO 2 Construction and performance research of core-shell structure [D]. Shaanxi University of Science and Technology, 2020.

[0025] The specific implementation process is prepared according to section 4.2.2 of monodisperse SiO 2 The microsphere method is performed by:

[0026] First weigh 0-10mL of ethanol and 3mL of TEOS and mix them evenly, then weigh 40-50mL of ethanol and 4mL of ammonia water and pour them into a 100mL beaker, and magnetically stir at 36°C to make the solution evenly mixed. Then add the uniform solution of ethanol and TEOS to the mixed solution of ethanol and ammonia water drop by drop, and control the dropping speed at 2-3s / drop, so that the generated particles are uniform and at the nanometer level. After the dropwise addition, the system was continuously stirred at cons

[0028] S1, SiO 2 Preparation of @PPy

[0029] 2g SiO 2 Add it into 100ml of deionized water, ultrasonically disperse it evenly, make it into a uniform silica solution, add 2ml of Py to the silica solution, stir it magnetically for 1 hour, add 1.0g potassium persulfate, and keep magnetic stirring to polymerize in situ 12h, the filtered product was washed 4 times with deionized water, and then dried at 70°C for 10h to obtain SiO 2 @PPy;

[0030] S2, SiO 2 Preparation of @PPy@ZnO

[0031] 0.3g ZnO-NH 2 Added to 60ml of water, after magnetic stirring for 20min, added 0.4g SiO 2 @PPy, after magnetic stirring at 50°C for 6h, washing with deionized water for 3 times, drying at 60°C for 8h, SiO 2 @PPy@ZnO, composite nano photocatalytic material;

[0032] Among them, ZnO-NH 2 Prepared according to the following method;

[0033] Add 100ml of ethanol to the round bottom flask, add 4g of ZnO, after magnetically stirring for 30min, add 8g of KH550, raise the temperature to 60°C and

[0035] S1, SiO 2 Preparation of @PPy

[0036] 2g SiO 2 Add it into 100ml of deionized water, ultrasonically disperse it evenly, make it into a uniform silica solution, add 2ml of Py to the silica solution, stir it magnetically for 1 hour, add 1.0g potassium persulfate, and keep magnetic stirring to polymerize in situ 12h, the filtered product was washed 4 times with deionized water, and then dried at 70°C for 10h to obtain SiO 2 @PPy;

[0037] S2, SiO 2 Preparation of @PPy@ZnO

[0038] 0.3g ZnO-NH 2 Add to 60ml of water, after magnetic stirring for 20min, add 0.7g SiO 2 @PPy, after magnetic stirring at 50°C for 6h, washing with deionized water for 3 times, drying at 60°C for 8h, SiO 2 @PPy@ZnO, that is composite nano photocatalytic material.

[0039] The ZnO-NH used in this embodiment 2 The preparation method is the same as in Example 1.