Preparation method and application of amino-activated magnetic large-aperture mesoporous silica composite microspheres
A technology of mesoporous silica and magnetic composite microspheres, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of low adsorption capacity and adsorption rate of decontamination materials, Easy to be interfered by coexisting ions, difficult to regenerate, etc., to achieve good recycling performance, efficient selective adsorption, and improved performance
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[0060] like Figure 1-12 Shown, the preparation method of the magnetic macroporous mesoporous silica composite microsphere activated by amino group comprises the following steps:
[0061] The first step, the preparation of Fe 3 o 4 Magnetic microspheres;
[0062] Dissolve 0.65 g of iron(III) chloride hexahydrate and 0.2 g of trisodium citrate in 20 mL of anhydrous ethylene glycol and magnetically stir for 1 h; then add 1.2 g of anhydrous sodium acetate and magnetically stir for 1 h; stir The final solution was poured into a polytetrafluoroethylene-lined autoclave for hydrothermal reaction; the finally obtained black product was washed three times with water and absolute ethanol, and dried at 60°C for 12 hours;
[0063] In the second step, monolayer silicon-coated Fe was prepared by hydrolysis 3 o 4 Magnetic composite microspheres;
[0064] Get the Fe prepared by 0.15g step (1) 3 o 4 Disperse into 200mL of absolute ethanol for ultrasonication, then add 10mL of concentra...
specific Embodiment 1
[0096] A method for preparing functionalized magnetic large-aperture mesoporous silica composite microspheres activated by an organic functional group amino group, comprising the following steps:
[0097] The first step is to prepare ferroferric oxide magnetic microspheres;
[0098] Dissolve 0.65 g of iron(III) chloride hexahydrate and 0.2 g of trisodium citrate in 20 mL of anhydrous ethylene glycol and magnetically stir for 1 h; then add 1.2 g of anhydrous sodium acetate and magnetically stir for 1 h; stir The final solution was poured into a polytetrafluoroethylene-lined autoclave for hydrothermal reaction at 200°C for 12 hours; the finally obtained black product was washed three times with water and absolute ethanol, and dried at 60°C for 12 hours; the product was named Sample-1.
[0099] The second step is to prepare single-layer silicon-coated magnetic composite microspheres:
[0100] Take 0.15g of sample-1 prepared in step (1) and disperse it into 200mL of absolute etha...
specific Embodiment 2
[0106] A method for preparing functionalized magnetic large-aperture mesoporous silica composite microspheres activated by an organic functional group amino group, comprising the following steps:
[0107] The first step is to prepare ferroferric oxide magnetic microspheres;
[0108] Dissolve 0.65 g of iron(III) chloride hexahydrate and 0.2 g of trisodium citrate in 20 mL of anhydrous ethylene glycol and magnetically stir for 1 h; then add 1.2 g of anhydrous sodium acetate and magnetically stir for 1 h; stir The final solution was poured into a polytetrafluoroethylene-lined autoclave for hydrothermal reaction at 200°C for 12 hours; the finally obtained black product was washed three times with water and absolute ethanol, and dried at 60°C for 12 hours; the product was named Sample-1.
[0109] The second step is to prepare single-layer silicon-coated magnetic composite microspheres;
[0110] Take 0.15g of sample-1 prepared in step (1) and disperse it into 200mL of absolute etha...
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