Magnetic composite adsorption material with sulfur-containing surface and preparation method
A technology of composite adsorption materials and magnetic composite materials, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of poor selective adsorption and no selective adsorption, and achieve the effect of large adsorption capacity
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Embodiment 1
[0034] 1g Fe 3 o 4 Add 50 ml of ethanol and 12.5 ml of deionized water, after 15 min of hyperdispersion, add ammonia water dropwise until the pH is greater than 9. Stir vigorously at 30°C for 30 min, then add 1 ml of TEOS dropwise, and after reacting for 45 min, add 2 ml of APTES dropwise. After continuing to react for 4 hours, stop stirring, filter under reduced pressure, and wash 3 times with ethanol and distilled water to obtain Fe 3 0 4 @SiO 2 -NH 2 .
[0035] In nitrogen atmosphere, 0.5g Fe 3 0 4 @SiO 2 -NH 2Disperse with 0.68g MITC in 60mL ethanol, stir at a constant speed at 60°C for 10h, filter under reduced pressure, wash and dry to obtain MP 1.0 -MITC.
Embodiment 2
[0037] 1g Fe 3 o 4 Add 50 ml of ethanol and 12.5 ml of deionized water, after 15 min of hyperdispersion, add ammonia water dropwise until the pH is greater than 9. Stir vigorously at 30°C for 30 min, then add 1 ml of TEOS dropwise, and after reacting for 45 min, add 2 ml of APTES dropwise. After continuing to react for 4 hours, stop stirring, filter under reduced pressure, and wash 3 times with ethanol and distilled water to obtain Fe 3 0 4 @SiO 2 -NH 2 .
[0038] Take the prepared Fe 3 o 4 @SiO 2 -NH 2 Add it to a 100mL three-necked flask filled with 60mL of methanol, and blow nitrogen gas. Add excess MA (10 mL) dropwise to the three-necked flask, and stop the reaction after stirring at 25° C. for 24 h. Filtrate under reduced pressure, wash with ethanol three times to obtain Fe 3 o 4 @SiO 2 -N 1.5 particles. Fe will be obtained 3 o 4 @SiO 2 -N 1.5 Add it to a 100mL three-necked flask filled with 60mL of methanol, and blow nitrogen gas. Add excess EDA (8 mL...
Embodiment 3
[0041] 1g Fe 3 o 4 Add 50 ml of ethanol and 12.5 ml of deionized water, after 15 min of hyperdispersion, add ammonia water dropwise until the pH is greater than 9. Stir vigorously at 30°C for 30 min, then add 1 ml of TEOS dropwise, and after reacting for 45 min, add 2 ml of APTES dropwise. After continuing to react for 4 hours, stop stirring, filter under reduced pressure, and wash 3 times with ethanol and distilled water to obtain Fe 3 0 4 @SiO 2 -NH 2 .
[0042] Take the prepared Fe 3 o 4 @SiO 2 -NH 2 Add it to a 100mL three-necked flask filled with 60mL of methanol, and blow nitrogen gas. Add excess MA (10 mL) dropwise to the three-necked flask, and stop the reaction after stirring at 25° C. for 24 h. Filtrate under reduced pressure, wash with ethanol three times to obtain Fe 3 o 4 @SiO 2 -N 1.5 particles. Fe will be obtained 3 o 4 @SiO 2 -N 1.5 Add it to a 100mL three-necked flask filled with 60mL of methanol, and blow nitrogen gas. Add excess EDA (8 mL...
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