Preparation method of magnetic rectorite/chitosan nano-grade composite material
A chitosan nano-composite material technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem of poor separation of adsorbed substances, limited application of rectorite, limited adsorption, etc. problems, to achieve the effect of improving the reuse rate, good adsorption efficiency, and control of the preparation process
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Embodiment 1
[0022] A kind of preparation method of magnetic rectorite / chitosan nano composite material, its steps are:
[0023] 1. Magnetic Fe 3 o 4 preparation of
[0024] 6.9g Fe 3 o 4 Dissolve with 75mL concentrated hydrochloric acid under the protection of nitrogen to form a yellow-brown transparent solution, add 2mL of surfactant Tween-80, and slowly add ammonia water dropwise under vigorous stirring. When the pH value is maintained at about 9, a large amount of black precipitates will form . Continue to stir for 15 minutes, then raise the temperature of the water bath to 80° C., and age at this temperature for 3 hours. After the reaction is completed, let it stand for precipitation at room temperature for 24 hours, and place the beaker containing the precipitation on a permanent magnet to accelerate the precipitation. Remove the supernatant, wash the precipitate with distilled water repeatedly for 3 times, then disperse the reactant in distilled water, then carry out magnetic s...
Embodiment 2
[0034] A kind of preparation method of magnetic rectorite / chitosan nano composite material, its steps are:
[0035] 1. Magnetic Fe 3 o 4 preparation of
[0036] 6.9g Fe 3 o 4 Dissolve with 75mL concentrated hydrochloric acid under the protection of nitrogen to form a yellow-brown transparent solution, add 2mL of surfactant Tween-80, and slowly add ammonia water dropwise under vigorous stirring. When the pH value is maintained at about 9, a large amount of black precipitates will form . Continue to stir for 15 minutes, then raise the temperature of the water bath to 80° C., and age at this temperature for 3 hours. After the reaction is completed, let it stand for precipitation at room temperature for 24 hours, and place the beaker containing the precipitation on a permanent magnet to accelerate the precipitation. Remove the supernatant, wash the precipitate with distilled water repeatedly for 3 times, then disperse the reactant in distilled water, then carry out magnetic s...
Embodiment 3
[0046] A kind of preparation method of magnetic rectorite / chitosan nano composite material, its steps are:
[0047] 1. Magnetic Fe 3 o 4 preparation of
[0048] 6.9g Fe 3 o 4 Dissolve with 75mL concentrated hydrochloric acid under the protection of nitrogen to form a yellow-brown transparent solution, add 2mL of surfactant Tween-80, and slowly add ammonia water dropwise under vigorous stirring. When the pH value is maintained at about 9, a large amount of black precipitates will form . Continue to stir for 15 minutes, then raise the temperature of the water bath to 80° C., and age at this temperature for 3 hours. After the reaction is completed, let it stand for precipitation at room temperature for 24 hours, and place the beaker containing the precipitation on a permanent magnet to accelerate the precipitation. Remove the supernatant, wash the precipitate with distilled water repeatedly for 3 times, then disperse the reactant in distilled water, then carry out magnetic s...
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