Method for extracting magnetic iron ferric oxide nanoparticles from traditional Chinese medicine magnetite and its products and applications
A technology of ferric tetroxide and nanoparticles, which is applied in the field of nano-biomedical materials, can solve problems such as incomplete removal of toxic substances and intermediate products, and achieve the effects of strong magnetic resonance signal, stable performance and stable physical and chemical properties.
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Embodiment 1
[0031] Add 3.0g of magnetite powder (passed through a 30-mesh sieve) into 100ml of water, stir thoroughly, and perform ultrasonic treatment for 30 minutes, let it stand to discard some non-magnetic impurities, place it on a temperature-controllable heating magnetic stirrer, and heat it to boiling rapidly. Turn on the magnetic stirring for five minutes, control the temperature and maintain a slight boiling state for 30 minutes, stir again for 5 minutes, continue to maintain a slight boiling state for 30 minutes, stir, and continue to slightly boil for a third time; make up for the lost water, cool naturally to room temperature, and take it The supernatant was washed with a strong magnet for three times, and it contained some nano-scale ferric oxide particles. On this basis, high-speed centrifugation was performed, and the original large particle layer and water layer were discarded to obtain a relatively uniform solution. The small particles of nano-scale ferric oxide particles ...
Embodiment 2
[0034] Add 3.0g of magnetite powder (passed through a 30-mesh sieve) into 100ml of water, stir well, discard some non-magnet impurities, place it on a temperature-controllable heating magnetic stirrer and heat it to boiling rapidly, turn on the magnetic stirrer for five minutes, and control Warm and maintain a slight boiling state for 30 minutes, stir again for 5 minutes, continue to maintain a slight boiling state for 30 minutes, stir, and continue to slightly boil for the third time; make up for the lost water, cool naturally to room temperature, take the supernatant, and use a strong magnet to quickly Settling and washing for three times, it contains some nano-scale iron ferric oxide particles. On this basis, perform high-speed centrifugation operation, discard the original large particle layer and water layer, and obtain non-uniform small particle ferric oxide Particles can be stored in water dispersion, or powder can be stored after freeze-drying.
[0035] Figure 5 It i...
Embodiment 3
[0037]Add 3.0g of magnetite powder (passed through a 30 mesh sieve) into 100ml of water, stir thoroughly, and perform ultrasonic treatment for 30 minutes, let it stand and discard some non-magnetic impurities, place it in a temperature-controllable heating magnetic stirrer to stir evenly, and continue ultrasonication for 30 minutes , repeated three times; make up the lost water, naturally cool to room temperature, let it stand fully, take its supernatant, and use a strong magnet to quickly stand for precipitation and wash three times, and it contains some nano-scale ferric oxide particles. Above, perform high-speed centrifugation operation, discard the original large particle layer and water layer, and obtain relatively uniform small particle ferric oxide particles, which can be stored in water dispersion, or the powder can be stored after freeze-drying.
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