Method for preparing magnetic metal-metal core-shell nano particles
A magnetic metal nano and magnetic metal technology, applied in the direction of coating, etc., can solve the problems of low coating rate, easy nucleation of shell metal, difficult control of shell metal formation, etc. Wide, guarantee the effect of effective coating
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Embodiment 1
[0033] Add 0.5mmol nickel acetylacetonate and 6ml oleylamine into the three-necked flask, stir and mix under the protection of argon, then add the mixture of 0.012mmol chloroauric acid and 0.3ml anisole into the three-necked flask, stir for 10min, and then heat up to 50°C, keep warm for 10min, then raise the temperature to 200°C, keep warm for 20min, then cool to 150°C. Quickly inject the mixture of 0.5mmol pre-prepared gold organic compound and 2ml chloroform, incubate at 140°C for 30min, cool naturally, add acetone to precipitate the nanoparticles, take out the reaction mother liquor by centrifugation, and then use ethanol, acetone, n-hexane mixed solution Repeated washing, centrifugation three times, and finally vacuum drying to obtain a powder product, its electron microscope picture and energy spectrum are as follows figure 1 and figure 2 shown.
Embodiment 2
[0035] Add 0.5mmol nickel acetylacetonate and 6ml oleylamine into the three-necked flask, stir and mix under the protection of argon, then add the mixture of 0.012mmol chloroauric acid and 0.3ml ethanol into the three-necked flask, stir for 10min and then heat up to 50°C , keep warm for 10min, then raise the temperature to 200°C, keep hold for 20min, then cool to 150°C. Quickly inject the mixture of 0.5mmol pre-prepared gold organic compound and 2ml chloroform, incubate at 130°C for 30min, cool naturally, add acetone to precipitate the nanoparticles, take out the reaction mother liquor by centrifugation, and then use ethanol, acetone, n-hexane mixed solution Repeated washing, centrifugation 3 times, and finally vacuum drying to obtain a powder product, its electron microscope picture is as follows: image 3 As shown, its energy spectrum and figure 2 similar.
Embodiment 3
[0037] Add 0.5mmol nickel acetylacetonate, 5ml oleylamine, and 2ml dodecylamine into the three-necked flask, stir and mix under the protection of argon, then add the mixture of 0.012mmol chloroauric acid and 0.3ml toluene into the there-necked flask, and stir for 10min Then raise the temperature to 50°C, keep the temperature for 10 minutes, then raise the temperature to 210°C, keep the temperature for 20 minutes, and then cool to 150°C. Quickly inject a mixture of 0.3mmol of pre-prepared gold organic compound and 3ml of chloroform, keep it warm at 130°C for 30min, then cool naturally, add acetone to precipitate the nanoparticles, take out the reaction mother liquor by centrifugation, and then use a mixed solution of ethanol, acetone, and n-hexane Repeated washing, centrifugation three times, and finally vacuum drying to obtain a powder product, its electron microscope picture is as follows: Figure 4 As shown, its energy spectrum and figure 2 similar.
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