Method for accessorily preparing nanometer cobaltosic oxide granules at room temperature by utilizing amino acids
A technology of cobalt tetroxide particles and amino acids, which is applied in the directions of cobalt oxide/cobalt hydroxide, nanotechnology, etc., can solve the problems of difficult particle size, difficult introduction, and difficult product biocompatibility, and achieves a simple and easy method. Compatibility effect
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[0015] The preparation of the cobalt trioxide nano-particles in the present invention is realized by a liquid phase precipitation method at room temperature. figure 1 It is an exemplary step for preparing cobalt tetroxide nanoparticles. It can be seen from this figure that the present invention has the advantages of simplicity, ease of implementation, and environmental friendliness. figure 2 is a transmission electron micrograph of cobalt tetraoxide nanoparticles. It can be seen from the figure that the diameter distribution of nanoparticles is very uniform and is 20-40 nm.
[0016] The method for preparing the nano-cobalt tetroxide material provided by the present invention has no special requirements on equipment, reagents, etc., so it is easy to carry out scale-up experiments and mass production. The following are illustrative specific embodiments of the invention by which the above and other advantages of the invention may be more fully understood.
Embodiment 1
[0018] Dissolve 1.45 g of cobalt nitrate hexahydrate in 50 mL of absolute ethanol, stir and mix with a magnetic stirrer for 10 minutes for pretreatment, then add 0.015 g of histidine to the above solution, and continue stirring for 30 minutes. The dispersion was put into a stoppered Erlenmeyer flask and left at room temperature for 24 hours. Disperse 0.4 g of sodium hydroxide in 50 mL of secondary water and mix well under stirring. At a stirring speed of 250 rpm and a temperature of 25 o Under the conditions of C., add 50 mL of the above aqueous sodium hydroxide solution dropwise to the ethanol solution of cobalt salt and histidine. Continue stirring at a speed of 200 rpm for 6 hours to facilitate the full reaction of the solution. Afterwards, the mixed system was left standing at room temperature for 7 days to facilitate the nucleation and growth of cobalt oxide nanoparticles. The final product can be obtained by centrifugation and washing. During centrifugation, the reac...
Embodiment 2
[0020] Dissolve 0.015g of histidine in 50 mL of absolute ethanol, stir for 30 minutes, then dissolve 1.45g of cobalt nitrate hexahydrate in the above solution, stir for 10 minutes for pretreatment, and place at room temperature for 24 hours. Dissolve 0.4 g of sodium hydroxide in 50 mL of secondary water, and mix well under stirring. Add the cobalt salt ethanol solution and sodium hydroxide aqueous solution dropwise into a 200 mL Erlenmeyer flask at room temperature, and continue stirring at a speed of 200 rpm for 3 hours to facilitate the full reaction of the solution. Afterwards, the mixed system was left at room temperature for 15 days to facilitate the nucleation and growth of cobalt oxide nanoparticles. The final product can be obtained by centrifugation and washing. During the centrifugation process, the precipitate was washed with absolute ethanol and centrifuged again 6 times, and the centrifugation time was extended for 20 minutes each time to obtain a relatively pure...
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