A kind of nitrogen-phosphorus-sulfur co-doped activated carbon and preparation method thereof
A technology of co-doping and activated carbon, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of physical and chemical properties of carbon materials, structural deformation, etc., and achieve the goal of promoting fixation, promoting pore formation, and good application prospects Effect
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Embodiment 1
[0015] The alkali / thiourea solution (30 g of sodium hydroxide, 30 g of potassium hydroxide, 60 g of thiourea, and 160 g of water) was frozen. Then, take 80 g of sawdust with a particle size of 0.18-0.25 mm and mix it with the thawed alkali / thiourea solution, add 20 g of melamine phosphate, freeze at low temperature for 5 hours, then activate at 900 ° C for 4 hours, cool to room temperature, pickle and wash, Until the pH value is neutral, it is dried to obtain nitrogen-phosphorus-sulfur co-doped activated carbon.
[0016] In this example, the iodine adsorption value of the nitrogen-phosphorus-sulfur co-doped activated carbon was 1204 mg / g, and the specific surface area was 1364 m 2 / g, the nitrogen content was 6.84%, the phosphorus content was 1.02%, and the sulfur content was 1.84%.
Embodiment 2
[0018] The alkali / thiourea solution (20 g of sodium hydroxide, 20 g of thiourea, 40 g of water) was frozen. Then, take 80 g of cannabis with a particle size of 0.18-0.25 mm and mix it with the thawed alkali / thiourea solution, add 40 g of ammonium hypophosphite, freeze at low temperature for 3 hours, then activate at 600 °C for 3 hours, cool to room temperature, and then pickle and wash with water. , until the pH value is neutral, and drying to obtain nitrogen-phosphorus-sulfur co-doped activated carbon.
[0019] In this example, the iodine adsorption value of the nitrogen-phosphorus-sulfur co-doped activated carbon was 563 mg / g, and the specific surface area was 620 m 2 / g, the nitrogen content was 4.68%, the phosphorus content was 1.42%, and the sulfur content was 2.06%.
Embodiment 3
[0021] The alkali / thiourea solution (50 g of potassium hydroxide, 30 g of thiourea, 120 g of water) was frozen. Then, take 80g of husks with a particle size of 0.18-0.25 mm and mix with the thawed alkali / thiourea solution, add 20g of ammonium phosphate, activate at 850°C for 2h, cool to room temperature, and then pickle and wash until pH value Neutral, dried to obtain nitrogen-phosphorus-sulfur co-doped activated carbon.
[0022] In this example, the iodine adsorption value of the nitrogen-phosphorus-sulfur co-doped activated carbon was 1214 mg / g, and the specific surface area was 1370 m 2 / g, the nitrogen content was 6.12%, the phosphorus content was 1.24%, and the sulfur content was 1.82%.
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