Method for preparing carbon-coated metal nano material whose particle diameter is controllable
A metal nano and carbon coating technology is applied in the intersection of carbon nano materials and metal nano materials to achieve the effect of low impurity content and convenient polymerization reaction operation.
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Embodiment 1
[0021] Weigh 0.2mmol of cetyltrimethylammonium bromide and add it to a small beaker containing 100ml of deionized water. After the solution is clarified, add 3mmol of resorcinol, 0.12mol of formaldehyde and 1.2ml of formaldehyde at a concentration of 0.11mol / l of ammonia solution. After fully stirring for 30 minutes, 0.1 mmol of ferrous oxalate was added, treated with ultrasound for 30 minutes, and the resulting solution was continued to react at 90° C. for 2.5 hours. After the reaction, the mother liquor was centrifuged, the precipitate was repeatedly washed with absolute ethanol and deionized water and centrifuged, and finally the brown product was dried overnight in an oven at 60°C. Collect the brown powder prepared above and put it into a quartz boat, place the quartz boat in the center of the quartz reaction tube in the tubular carbonization furnace, and carry out carbonization treatment at a certain heating rate. The whole carbonization process is carried out under the...
Embodiment 2
[0023] Weigh 0.2mmol of cetyltrimethylammonium bromide and add it to a small beaker containing 100ml of deionized water. After the solution is clarified, add 3mmol of resorcinol, 0.12mol of formaldehyde and 1.2ml of formaldehyde at a concentration of 0.11mol / l of ammonia solution. After fully stirring for 30 minutes, 0.16 mmol of ferrous oxalate was added, and ultrasonic treatment was performed for 30 minutes. Then the stirring was accelerated, and the resulting solution was continued to react at 90° C. for 2.5 h. After the reaction, the mother liquor was centrifuged, the precipitate was repeatedly washed with absolute ethanol and deionized water and centrifuged, and finally the brown product was dried overnight in an oven at 60°C. Collect the brown powder prepared above and put it into a quartz boat, place the quartz boat in the center of the quartz reaction tube in the tubular carbonization furnace, and carry out carbonization treatment at a certain heating rate. The whol...
Embodiment 3
[0025] Weigh 0.2mmol of cetyltrimethylammonium bromide and add it to a small beaker containing 100ml of deionized water. After the solution is clarified, add 3mmol of resorcinol, 0.12mol of formaldehyde and 1.2ml of formaldehyde at a concentration of 0.11mol / l of ammonia solution. After fully stirring for 30 minutes, 0.2 mmol of ferrous oxalate was added, and ultrasonic treatment was performed for 30 minutes. Then the stirring was accelerated, and the resulting solution was continued to react at 90° C. for 2.5 h. After the reaction, the mother liquor was centrifuged, the precipitate was repeatedly washed with absolute ethanol and deionized water and centrifuged, and finally the brown product was dried overnight in an oven at 60°C. Collect the brown powder prepared above and put it into a quartz boat, place the quartz boat in the center of the quartz reaction tube in the tubular carbonization furnace, and carry out carbonization treatment at a certain heating rate. The whole...
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