A kind of mpg-c3n4 photocatalyst with higher photocatalytic activity and its preparation method and application
A technology of mpg-c3n4 and photocatalytic activity, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of mild reaction conditions, enhanced photocatalytic activity, and increased specific surface area
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Embodiment 1
[0032] Step 1: with 40g melamine and 150mL silica sol (containing the SiO that massfraction is 40%) 2 , the particle size is 12nm) and mix evenly, heat and stir at 90°C until the solvent is evaporated to dryness to obtain a white solid, grind the white solid and put it into a crucible, and heat it up to 2.5°C / min in a muffle furnace. Calcined at 550°C for 4 hours to obtain a yellow powder, and then 4mol / L NH 4 HF 2 The aqueous solution corrodes the yellow powder to remove SiO in the yellow powder 2 , finally washed and dried at 80°C for 10 h to obtain mpg-C 3 N 4 Powder;
[0033] Step 2: Convert 1g mpg-C 3 N 4 Add the powder into 1mol / L, 40mL HCL solution and stir evenly to obtain an acidic modified precursor;
[0034] Step 3: Add the acidic modified precursor liquid into the microwave hydrothermal reactor, place the microwave hydrothermal reactor in the microwave-assisted hydrothermal synthesizer, set the pressure at 1.2MPa, and raise the temperature from room temperat...
Embodiment 2
[0036] Step 1: with 40g melamine and 150mL silica sol (containing the SiO that massfraction is 40%) 2 , the particle size is 12nm) and mix evenly, heat and stir at 90°C until the solvent is evaporated to dryness to obtain a white solid, grind the white solid and put it into a crucible, and heat it up to 2.5°C / min in a muffle furnace. Calcined at 550°C for 4 hours to obtain a yellow powder, and then 4mol / L NH 4 HF 2 The aqueous solution corrodes the yellow powder to remove SiO in the yellow powder 2 , finally washed and dried at 80°C for 10 h to obtain mpg-C 3 N 4 Powder;
[0037] Step 2: Convert 1g mpg-C 3 N 4 Add the powder to 0.5mol / L, 40mL of HNO 3 Stir evenly in the solution to obtain an acidic modified precursor solution;
[0038] Step 3: Add the acidic modified precursor liquid into the microwave hydrothermal reactor, place the microwave hydrothermal reactor in the microwave-assisted hydrothermal synthesizer, set the pressure at 1.2MPa, and raise the temperature ...
Embodiment 3
[0040] Step 1: with 40g melamine and 150mL silica sol (containing the SiO that massfraction is 40%) 2 , the particle size is 12nm) and mix evenly, heat and stir at 90°C until the solvent is evaporated to dryness to obtain a white solid, grind the white solid and put it into a crucible, and heat it up to 2.5°C / min in a muffle furnace. Calcined at 550°C for 4 hours to obtain a yellow powder, and then 4mol / L NH 4 HF 2 The aqueous solution corrodes the yellow powder to remove SiO in the yellow powder 2 , finally washed and dried at 80°C for 10 h to obtain mpg-C 3 N 4 Powder;
[0041] Step 2: Convert 1g mpg-C 3 N 4 Add the powder into a 0.2mol / L, 50mL NaOH solution and stir evenly to obtain an alkaline modified precursor;
[0042] Step 3: Stir the alkaline modified precursor solution for 30 minutes until uniform, then ultrasonically disperse it for 10 minutes, and then heat-preserve it at 100°C for 20 hours. mpg-C 3 N 4 catalyst of light.
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