Core-shell structure au@ptcu nanocrystal and its preparation method and application
A core-shell structure and nanocrystal technology, applied in the field of nanomaterials, can solve problems such as high cost, achieve adjustable composition, good shape and size uniformity, and improve the catalytic activity of methanol oxidation
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Embodiment 1
[0025] A core-shell structure Au@PtCu nanocrystal, the preparation method of which is:
[0026] (1) Under room temperature, dissolve auric acid chloride in 3mL oleylamine, stir evenly with a magnetic force, and prepare a chloroauric acid solution with a concentration of 0.012mol / L;
[0027] (2) Add 7 mL of oleylamine into a 2 mL three-necked flask, put the three-necked flask into an oil bath at 180°C, preheat it with magnetic stirring for 10 minutes, and quickly inject the chloroauric acid solution prepared in step (1) with a pipette, The reaction was continued for 3 hours. After the reaction, the product was centrifuged and washed three times with cyclohexane and ethanol, and the obtained black precipitate was redispersed in 10 mL of oleylamine solution to obtain a gold particle seed solution;
[0028] (3) Under room temperature conditions, cetyltrimethylammonium bromide is dissolved in 4mL oleylamine, magnetically stirred evenly, and preparation concentration is the cetyltri...
Embodiment 2
[0035] A core-shell structure Au@PtCu nanocrystal, the preparation method of which is:
[0036] (1) Under room temperature, dissolve auric acid chloride in 3mL oleylamine, stir evenly with a magnetic force, and prepare a chloroauric acid solution with a concentration of 0.012mol / L;
[0037] (2) Add 7 mL of oleylamine into a 25 mL three-necked flask, put the three-necked flask into an oil bath at 110°C, preheat it with magnetic stirring for 10 minutes, and quickly inject the chloroauric acid solution prepared in step (1) with a pipette , continue to react for 4h, after the reaction, the product is centrifuged and washed three times with cyclohexane and ethanol, and the obtained black precipitate is redispersed in 10mL oleylamine solution to obtain a gold particle seed solution;
[0038] (3) Under room temperature conditions, cetyltrimethylammonium chloride is dissolved in 4mL oleylamine, magnetically stirred evenly, and preparation concentration is the cetyltrimethylammonium ch...
Embodiment 3
[0044] A core-shell structure Au@PtCu nanocrystal, the preparation method of which is:
[0045] (1) Under room temperature, gold chloride was dissolved in 4mL oleylamine, magnetically stirred evenly, and a gold chloride solution with a concentration of 0.009mol / L was prepared;
[0046] (2) Add 6 mL of oleylamine into a 25 mL three-necked flask, put the three-necked flask into an oil bath at 180°C, preheat it with magnetic stirring for 10 minutes, and quickly inject the gold chloride solution prepared in step (1) with a pipette, The reaction was continued for 3 hours. After the reaction, the product was centrifuged and washed three times with cyclohexane and ethanol, and the obtained black precipitate was redispersed in 10 mL of oleylamine solution to obtain a gold particle seed solution;
[0047] (3) Under room temperature conditions, dodecyltrimethylammonium bromide is dissolved in 4mL oleylamine, magnetically stirred evenly, preparation concentration is the dodecyltrimethyla...
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