A kind of preparation method of nano fe3o4 octahedral structure
An octahedral and nanotechnology, applied in the field of preparation of nano Fe3O4 particles, can solve problems such as unfavorable precise control and industrial production, insufficient depth of octahedral structure, complicated preparation process, etc., and achieves simple and efficient dispersion, narrow size distribution, and preparation. simple craftsmanship
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Embodiment 1
[0028] 1.1 Mix 8.86mL oleic acid and 32mL absolute ethanol evenly, add to 25mL ferric chloride aqueous solution (c=0.371mol / L), stir at room temperature until the reaction is complete;
[0029] 1.2 Add 15mL of n-hexane to the above reaction solution, separate the liquid through a pear-shaped funnel, and place it in an oven at 110°C for 5 hours to obtain ferric oleate;
[0030] 1.3 Put 5mL ferric oleate, 8mL oleylamine and 30mL octadecene in a four-necked bottle and mix them evenly. 2 Heated to 310°C under protection and kept for 30 minutes;
[0031] 1.4 Centrifuge and wash the cooled sample to obtain Fe with a size of 14nm 3 o 4 Octahedral particles, the microscopic morphology, phase structure and magnetic properties of the product are as follows figure 1 , 2 As shown in and 3, it can be seen from the figure that the product is uniformly dispersed without agglomeration.
Embodiment 2
[0033] 2.1 Mix 8.86mL oleic acid and 32mL absolute ethanol evenly, add to 25mL ferric chloride aqueous solution (c=0.371mol / L), stir at room temperature until the reaction is complete;
[0034] 2.2 Add 15mL of n-hexane to the above reaction solution, separate the liquid through a pear-shaped funnel, and place it in an oven at 110°C for 5 hours to obtain ferric oleate;
[0035] 2.3 Put 5mL ferric oleate, 6mL oleylamine and 25mL octadecene in a four-necked bottle and mix evenly. 2 Heated to 310°C under protection and kept for 60 minutes;
[0036] 2.4 Centrifuge and wash the cooled sample to obtain Fe with a size of 17.5nm 3 o 4 octahedral particles.
Embodiment 3
[0038] 3.1 Mix 8.86mL oleic acid and 32mL absolute ethanol evenly, add to 25mL ferric chloride aqueous solution (c=0.371mol / L), stir at room temperature until the reaction is complete;
[0039] 3.2 Add 15mL of n-hexane to the above reaction solution, separate the liquid through a pear-shaped funnel, and place it in an oven at 110°C for 5 hours to obtain ferric oleate;
[0040] 3.3 Put 5mL ferric oleate, 8mL oleylamine and 30mL octadecene in a four-necked bottle and mix evenly. 2 Heated to 310°C under protection and kept for 20 minutes;
[0041] 3.4 Centrifuge and wash the cooled sample to obtain Fe with a size of 13.5nm 3 o 4 octahedral particles, such as Figure 4 shown.
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