ZnO-C3N4-CQDs visible light catalytic composite material and preparation method thereof

[0021] A ZnO-C 3 N 4 -The preparation method of CQDs visible photocatalysis composite material, concrete steps are as follows:

[0022] (1) Stir and mix zinc nitrate, CQDs aqueous solution, melamine and water according to the solid-to-liquid mass ratio of 1g: 12ml: 0.3g: 2g: 25ml, and adjust the pH value to 11 with ammonia water. The carbon quantum dot aqueous solution content is 5mg / ml;

[0023] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 70°C at 4°C / min, keep it for 1h, and then rapidly raise the temperature to 210°C at 9°C / min , kept for 30min, and finally cooled to room temperature;

[0024] (3) Wash and dry in vacuum at 50°C for 12 hours to obtain ZnO-C 3 N 4 -CQDs visible light photocatalytic composites.

[0025] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous electrolysis at 3...

[0032] A ZnO-C 3 N 4 -The preparation method of CQDs visible photocatalysis composite material, concrete steps are as follows:

[0033] (1) Stir and mix zinc nitrate, CQDs aqueous solution, melamine and water according to the solid-to-liquid mass ratio of 1g: 10ml: 0.2g: 1g: 20ml, and adjust the pH value to 11 with ammonia water. The content of the aqueous solution of carbon quantum dots is 1 mg / ml;

[0034] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 70°C at 4°C / min, keep it for 1h, and then rapidly raise the temperature to 200°C at 9°C / min , kept for 30min, and finally cooled to room temperature;

[0035] (3) Wash and dry in vacuum at 50°C for 12 hours to obtain ZnO-C 3 N 4 -CQDs visible light photocatalytic composites.

[0036] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous elect...

[0039] A ZnO-C 3 N 4 -The preparation method of CQDs visible photocatalysis composite material, concrete steps are as follows:

[0040] (1) Stir and mix zinc nitrate, CQDs aqueous solution, melamine and water according to the solid-to-liquid mass ratio of 1g: 15ml: 0.5g: 4g: 30ml, and adjust the pH value to 11 with ammonia water. The content of the aqueous solution of carbon quantum dots is 10 mg / ml;

[0041] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 70°C at 4°C / min, keep it for 1h, and then rapidly raise the temperature to 220°C at 9°C / min , kept for 30min, and finally cooled to room temperature;

[0042] (3) Wash and dry in vacuum at 50°C for 12 hours to obtain ZnO-C 3 N 4 - CQDs visible light photocatalytic composites.

[0043] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous ele...