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Preparation method of carbon quantum dots with changeable color and photothermal effect as well as product of preparation method and application of carbon quantum dots

A technology of photothermal effect and carbon quantum dots, which is applied in the direction of medical preparations containing active ingredients, color-changing fluorescent materials, preparations for in vivo experiments, etc., can solve rare problems, achieve low economic cost, inhibit tumor growth, and prepare The effect of simple process

Active Publication Date: 2018-07-27
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are few reports on the application of carbon dots to plants, and its key technology has yet to be developed.

Method used

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  • Preparation method of carbon quantum dots with changeable color and photothermal effect as well as product of preparation method and application of carbon quantum dots
  • Preparation method of carbon quantum dots with changeable color and photothermal effect as well as product of preparation method and application of carbon quantum dots
  • Preparation method of carbon quantum dots with changeable color and photothermal effect as well as product of preparation method and application of carbon quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of carbon quantum dots with variable color and photothermal effect:

[0042] Step 1. Weigh 1ml of black ink (Hero brand) into a 50mL beaker, add 19mL of deionized water, stir at 500rpm for 15min at 25°C, and the stirring speed is 450-650r / min.

[0043] Step 2, the stirred solution was transferred to a polytetrafluoroethylene hydrothermal reaction kettle, placed in a vacuum drying oven, and heated at a constant temperature of 200° C. for 12 hours.

[0044] Step 3, after the reaction, wait for the product to cool down to 25°C naturally.

[0045] Step 4, the obtained solution was placed in a 5ml centrifuge tube, then transferred to a high-speed centrifuge, centrifuged at a speed of 10000r / min for 15min, and then filtered with a 0.22μm microporous filter head to obtain a solution of carbon quantum dots.

[0046]Step 5, vacuum freeze-dry the obtained solution at a temperature of -55° C. for 26 hours and a vacuum of 9.6 Pa to obtain a color-changing fluorescent c...

Embodiment 2

[0052] Preparation of carbon quantum dots with variable color and photothermal effect:

[0053] Step 1. Weigh 1ml of black ink (Hero brand) into a 50mL beaker, add 19mL of deionized water, stir at 500rpm for 15min at 25°C, and the stirring speed is 450-650r / min.

[0054] Step 2: Transfer the stirred solution to a polytetrafluoroethylene hydrothermal reaction kettle, place in a vacuum drying oven, and heat at a constant temperature of 200° C. for 14 hours.

[0055] Step 3, after the reaction, wait for the product to cool down to 25°C naturally.

[0056] Step 4, the obtained solution was placed in a 5ml centrifuge tube, then transferred to a high-speed centrifuge, centrifuged at a speed of 10000r / min for 15min, and then filtered with a 0.22μm microporous filter head to obtain a solution of carbon quantum dots.

[0057] Step 5, vacuum freeze-dry the obtained solution at a temperature of -55° C. for 26 hours and a vacuum of 9.6 Pa to obtain a color-changing fluorescent carbon qua...

Embodiment 3

[0062] Preparation of carbon quantum dots with variable color and photothermal effect:

[0063] Step 1. Weigh 1ml of black ink (Hero brand) into a 50mL beaker, add 19mL of deionized water, and stir at 500rpm for 15min at 25°C.

[0064] Step 2: Transfer the stirred solution to a polytetrafluoroethylene hydrothermal reaction kettle, place it in a vacuum drying oven, and heat at a constant temperature of 200° C. for 10 h.

[0065] Step 3, after the reaction, wait for the product to cool down to 25°C naturally.

[0066] Step 4, the obtained solution was placed in a 5ml centrifuge tube, then transferred to a high-speed centrifuge, centrifuged at a speed of 10000r / min for 15min, and then filtered with a 0.22μm microporous filter head to obtain a solution of carbon quantum dots.

[0067] Step 5, vacuum freeze-dry the obtained solution at a temperature of -55° C. for 26 hours and a vacuum of 9.6 Pa to obtain a color-changing fluorescent carbon quantum dot powder.

[0068] Figure 6...

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Abstract

The invention discloses a preparation method of carbon quantum dots with a changeable color and a photothermal effect as well as a product of the preparation method and application of the carbon quantum dots. The preparation method comprises the following steps: mixing: mixing ink and water; reacting: after mixing, heating and reacting; freezing: freezing and drying to obtain quantum dot powder with the changeable color and the photothermal effect. The preparation method has the advantages of simple preparation technology and low economic cost; a surface passivating agent does not need to be added and the carbon quantum dots with the changeable color can be prepared in one step. The carbon quantum dots provided by the invention have the characteristics of color changing performance, excellent photoluminescence performance and the like, the carbon quantum dots bring a great prospect to future agriculture and are especially used for monitoring changes of cells in plants; the carbon quantum dots are dispersed in a high polymer and can be used as an anti-fake label of an agricultural film. The carbon quantum dots prepared by the preparation method have good biocompatibility, low toxicity and photoluminescence performance and can be used as a fluorescent probe in an organism. The carbon quantum dots prepared by the preparation method have the photothermal effect and can be used as acarrier for inhibiting the growth of tumors and treating the tumors.

Description

technical field [0001] The invention belongs to the technical field of fluorescent carbon nanomaterials, and in particular relates to a preparation method of carbon quantum dots with variable color and photothermal effect, as well as products and applications thereof. Background technique [0002] Carbon quantum dots are a kind of spherical zero-dimensional semiconductor nanocrystals with a diameter of less than 10nm that have emerged in recent years, and are a new type of fluorescent carbon nanoparticles. Carbon dots are nanoclusters composed of atoms or a small number of molecules. Compared with large particle size quantum dots whose molecular weight usually reaches hundreds of thousands, the particle size of carbon dots is generally composed of several nanometers, and the molecular weight is only a few thousand to several Ten thousand. Carbon dots are usually composed of four basic elements, carbon, hydrogen, oxygen, and nitrogen. Compared with untreated, non-fluorescent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00C09K11/65B82Y20/00B82Y40/00A61K41/00A61K49/00A61P35/00G01N21/64G01N21/33G01N21/78
CPCA61K41/0052A61K49/0067G01N21/33G01N21/6486G01N21/78C09K9/00C09K11/65B82Y20/00B82Y40/00
Inventor 沈健周宁琳孙宝宏张明楚晓红吴凡袁平池铖
Owner NANJING NORMAL UNIVERSITY
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