A kind of preparation method of hydrazine modified carbon-based quantum dot/nano gold particle composite material
A technology of carbon-based quantum dots and nano-gold particles, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of direct fixation of quantum dots, achieve less reagents, easy product purification, and good anode electrochemiluminescence activity Effect
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Embodiment 1
[0027] 0.1 g of carbon-based quantum dots was dissolved in 50 mL of water, and added to a 4 mL hydrazine hydrate flask and refluxed at 80° C. for 48 h. Reflux was then stopped and the resulting solution was dried at 80°C to remove excess hydrazine hydrate. Take 10mg of hydrazine-modified carbon-based quantum dots and completely dissolve them in 50mL of water, and heat to boiling. Then quickly add 1mL of 5 mg / mL chloroauric acid solution and keep boiling for 30mim. After cooling, the supernatant was taken, and centrifuged and washed 5 times under the condition of centrifugal force of 2770g, to obtain the hydrazine-modified carbon-based quantum dot / nano-gold particle composite material.
Embodiment 2
[0029] 0.01 g of carbon-based quantum dots was dissolved in 100 mL of water, and added to a 0.5 mL hydrazine hydrate flask and refluxed at 130° C. for 24 h. Reflux was then stopped and the resulting solution was dried at 60°C to remove excess hydrazine hydrate. Take 5 mg of hydrazine-modified carbon-based quantum dots and completely dissolve them in 100 mL of water, and heat to boiling. Then quickly add 1 mL of 1 mg / mL chloroauric acid solution and keep boiling at 60 min. After cooling, the supernatant was taken, and the centrifugal force was 10000g, and the centrifugal washing was repeated 5 times to obtain the hydrazine-modified carbon-based quantum dot / nano-gold particle composite material.
Embodiment 3
[0031] 0.2 g of carbon-based quantum dots was dissolved in 200 mL of water, and added to a 10 mL hydrazine hydrate flask and refluxed at 130° C. for 24 h. Reflux was then stopped and the resulting solution was dried at 60°C to remove excess hydrazine hydrate. Take 10mg of hydrazine-modified carbon-based quantum dots and completely dissolve them in 20mL of water, and heat to boiling. Immediately add 1mL 5mg / mL of chloroauric acid solution quickly and keep boiling at 300mim. After cooling, take the supernatant, and repeat centrifugation and washing for 5 times under the condition of centrifugal force of 1000g, to obtain the hydrazine-modified carbon-based quantum dot / nano-gold particle composite material.
[0032] figure 1 The transmission electron microscope image of the prepared hydrazine-modified carbon-based quantum dots / nano-gold particle composite. This figure shows that the nano-gold particles in the composite material prepared by this method have a size of 10-30 nm a...
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