Preparation method of magnesium oxide modified carbon nanotube material and application of magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery

[0049] Add 1 g of purchased multi-walled carbon nanotubes (with a particle size range of 60 to 100 nm) into 100 ml of MgCl 2 ·6H 2 In O solution, the mass ratio of Mg element to carbon nanotube is 0.12. After 24 hours of magnetic stirring at 120 rpm at room temperature, the mixture was dried in a 388.15K blast oven for 24 hours. Under nitrogen protection, the dried mixture was calcined in a high temperature tube furnace. Adjust the nitrogen flow rate to 60mL / min, keep it for 20 minutes, and exhaust the oxygen in the high temperature tube furnace. Set the initial temperature to 50°C, raise the temperature to 600°C at a rate of 5°C / min, and keep it for 2 hours. After the temperature was cooled to room temperature, the obtained product was washed with deionized water several times to remove impurities, dried in an oven at 65°C to constant weight, fully ground with an agate mortar and then transferred to a polyethylene tube for sealing to obtain Magnesium oxide modified carbon...

[0051] Example 1 was repeated with the same steps, except that the mass ratio of Mg element to carbon nanotube was 0.24.

[0053] Example 1 was repeated with the same steps, except that the mass ratio of Mg element to carbon nanotube was 0.36.