A kind of preparation method of magnesium oxide-carbon composite microsphere
A technology of carbon composite and magnesium oxide, which is applied in the direction of chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of irregular particle shape, high cost, and difficult continuous preparation, etc., to achieve The effect of continuous preparation, easy operation, and high specific surface area
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Embodiment 1
[0021] 2mol / L of 100mL MgCl 2 Mix with 0.5mol / L 100mL glucose solution, stir evenly, and pass air with a flow rate of 1.0L / min through an aerosol generator and a tube-type pyrolysis furnace. The temperature of the tube-type furnace is 600°C, and the gas phase Separated from the solid phase to obtain the primary product. After the initial product was washed three times with water, it was dried in an oven at 60°C, and then in N 2 Place it in a tube furnace under atmosphere, and calcinate at 600°C for 2 hours to obtain magnesium oxide-carbon composite microspheres. Its structure is as figure 1 and figure 2 shown.
[0022] Magnesium oxide-carbon composite microspheres have excellent adsorption properties for organic dyes represented by Congo red and heavy metal ions represented by Pb(II). Use 100ppm, 500ppm, 1000ppm Congo red as the test solution respectively, select 5min, 10min, 15min, 20min and 25min as the test time points, the adsorption experiment results show that the ...
Embodiment 2
[0027] 2mol / L of 100mLMgCl 2 Mix with 100mL of resorcinol and formaldehyde solution (molar ratio 1:2) of 0.5mol / L, after stirring evenly, pass through the aerosol generator and the tubular pyrolysis furnace of nitrogen gas through the reaction device at a flow rate of 1.5L / min, The temperature of the tube furnace is 600°C. The gas phase and the solid phase are separated by a solid-gas separator, and the solid powder is collected to obtain the primary product; the collected primary product is washed three times and then centrifuged, and the collected solid powder is in an oven at 60°C dry in, then in N 2 Under the atmosphere, calcined at 500° C. for 2 hours to obtain magnesium oxide-carbon composite microspheres. Magnesium oxide-carbon composite microspheres have excellent adsorption properties for organic dyes represented by Congo red and heavy metal ions represented by Pb(II); antibacterial experiments show that the composite microspheres have an antibacterial rate of 99% ag...
Embodiment 3
[0029] 100mL of 1mol / L MgCl 2 Mix with 0.1mol / L 100mL β-cyclodextrin solution dissolved in hot water, stir evenly under heating conditions, and pass through the aerosol generator and tubular pyrolysis furnace of the reaction device with a flow rate of 1.5L / min nitrogen. The temperature of the tube furnace is 600°C. The gas phase and the solid phase are separated by a solid-gas separator, and the solid powder is collected to obtain the primary product. After being washed three times with water, it is centrifuged, and the collected solid powder is dried in an oven at 80°C. products in N 2 Under the atmosphere, calcined at 500° C. for 2 hours to obtain magnesium oxide-carbon composite microspheres. The prepared magnesium oxide-carbon composite microspheres have excellent adsorption performance on Congo red and Pb(II), and the antibacterial rate against Escherichia coli and Staphylococcus aureus reaches 99%.
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