Preparation method of carbon defect type carbon nitride material for photocatalytic nitrogen fixation
A carbon nitride and carbon defect technology, which is applied in the field of preparation of carbon-defective carbon nitride materials, can solve the problems of low dispersion, high recombination rate, low electrical conductivity, etc., and achieves reduced recombination rate, short production cycle, The effect of reducing production costs
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Embodiment 1
[0037] 1. Put 20g of urea in a 100ml covered quartz crucible and put it into a muffle furnace for calcination. The calcination temperature is 550°C, the holding time is 4 hours, and the heating rate is 5°C / min;
[0038] 2. Grind for 30 minutes to obtain finely divided carbon nitride powder;
[0039] 3. The second calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 520°C, the holding time is 2 hours, and the heating rate is 5°C / min;
[0040] 4. The third calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 520°C, the holding time is 2 hours, and the heating rate is 5°C / min.
Embodiment 2
[0042] 1. Put 20g of urea in a 100ml covered quartz crucible and put it into a muffle furnace for calcination. The calcination temperature is 530°C, the holding time is 2 hours, and the heating rate is 2°C / min;
[0043] 2. Grind for 30 minutes to obtain finely divided carbon nitride powder;
[0044] 3. The second calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 550°C, the holding time is 4 hours, and the heating rate is 2°C / min;
[0045]4. The third calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 550°C, the holding time is 4 hours, and the heating rate is 2°C / min.
Embodiment 3
[0047] 1. Put 20g of urea in a 100ml covered quartz crucible and put it into a muffle furnace for calcination. The calcination temperature is 520°C, the holding time is 3 hours, and the heating rate is 3°C / min;
[0048] 2. Grind for 30 minutes to obtain finely divided carbon nitride powder;
[0049] 3. The second calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 530°C, the holding time is 3 hours, and the heating rate is 3°C / min;
[0050] 4. The third calcination: spread the above-mentioned carbon nitride evenly in the porcelain boat, the thickness should not exceed 2mm, put it into the muffle furnace for calcination, the calcination temperature is 530°C, the holding time is 3 hours, and the heating rate is 3°C / min.
[0051] Such as figure 1 Shown, g-C 3 N 4 For bulk carbon nitride, g-C 3 N 4 -V is carbon-deficient carb...
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