Core-shell type magnetic mesoporous nano-microsphere as well as preparation method and application thereof
A nano-microsphere, mesoporous technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., to achieve the effect of large adsorption and low dosage
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[0026] (2) Preparation of Fe2O3 nanoparticles: 0.02molL -1 The ferric chloride was aged at 100 °C for 48 hours, and then centrifuged at 6000 rpm to obtain a red precipitate. The red precipitate was washed three times with water and ethanol, and finally dissolved in water to obtain ferric oxide nanoparticles with a diameter of 100nm-150nm. aqueous solution.
[0027] (3) Silica-coated iron oxide (FeO x nSiO 2 ) preparation: dissolve 0.3g ferric oxide or ferric oxide nanoparticles in a mixture of 160ml ethanol and 40ml water, ultrasonicate for 10 minutes, then place this mixture in a 250ml round-bottomed flask, stir mechanically Add 3.5ml of ammonia water with a mass concentration of 25%-28%, stir for 15 minutes, add 1ml-2ml of tetraethoxysilane, continue to stir and react for 6-10h, and finally wash the obtained product with water and ethanol three times respectively, namely Obtain FeO with a diameter of 100nm-380nm x nSiO 2 .
[0028] (4) FeO x nSiO 2 mSiO 2 Preparatio...
Embodiment 1
[0029] Example 1. Preparation of Core-Shell Magnetic Mesoporous Carbon Nanoparticles (RTMMCs)
[0030] (1) Mesoporous carbon / FeO x nSiO 2 mSiO 2 Preparation of complexes
[0031] A 60Wt% solution of furfural in trimethylbenzene was added dropwise to 1 g FeO x nSiO 2 mSiO 2 In the template material, stop adding when it is just completely wet, then vacuum dry below 50 °C, repeat this step twice, and then place it in an oven at 50 °C for two days, and at 90 °C for one day. Then under argon protection, calcination and carbonization at 700 °C for 8 hours to obtain mesoporous carbon / FeO x nSiO 2 mSiO 2 Complex;
[0032] (2) Preparation of core-shell magnetic mesoporous carbon nanospheres RTMMCs
[0033] The mesoporous carbon / FeO x nSiO 2 mSiO 2 The complexes were dissolved in 100 ml of 5Wt% aqueous sodium hydroxide solution (mesoporous carbon / FeO x nSiO 2 mSiO 2 The mass ratio of the complex to sodium hydroxide is 1:5), refluxed for 3 hours, and then washed twice with ...
Embodiment 2
[0035] Example 2. Preparation of Core-Shell Magnetic Mesoporous Carbon Nanoparticles (RTMMCs)
[0036] (1) Mesoporous carbon / FeO x nSiO 2 mSiO 2 Preparation of complexes
[0037] With the steps in step (1) of Example 1, the difference is: the concentration of the trimethylbenzene solution of furfural is 20Wt%.
[0038] (2) Preparation of core-shell magnetic mesoporous carbon nanospheres RTMMCs
[0039] With the steps in step (2) of Example 1, the diameter of the RTMMCs is 350 nm, and the pore diameter is 3 nm.
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