Carbon dot composite nanoparticles, carbon dot/fluoride composite material, preparation method and application

Abstract

The invention provides carbon quantum dot composite nanoparticles, and a carbon quantum dot / fluoride composite material, a preparation method and applications thereof, wherein carbon quantum dots arecompounded into the interior of fluoride crystals in carbon quantum dot / fluoride composite nanoparticles, such that the carbon quantum dots can achieve the advantages of solid-state light emitting, notoxicity, high-temperature resistance, decomposition resistance and good stability, and can absorb UV and be converted into blue light required for plants. The invention further provides a one-step preparation scheme of the carbon quantum dot / fluoride composite nanoparticles, wherein the one-step preparation scheme has characteristics of simple process and low cost, and is suitable for industrialproduction. The invention further provides a carbon quantum dot / fluoride / polymer composite material, which compounds the carbon quantum dot / fluoride nanoparticles and a polymer material, has high transparency, and further has light conversion, toughening or anti-aging effect, wherein the preparation method is simple and easy-performing, can be used for the preparation of agricultural films or rubber products, and has good industrialization prospect.

Description

technical field

[0001] The invention belongs to the field of new materials, and in particular relates to a carbon dot composite nano particle, a carbon dot / fluoride composite material, a preparation method and an application. Background technique

[0002] Most of the existing materials have single light conversion, toughening or anti-aging effects, and they face problems such as high cost, high toxicity, complex reaction conditions, and environmental pollution. For example, the current light conversion agents are mostly rare earth-based doped fluorescent materials, but due to the limited rare earth resources on the earth, such materials are expensive, and the average market price per gram of rare earth metals is thousands of yuan; at the same time, rare earth-based doped fluorescent materials The synthesis conditions of materials are complicated, and high-temperature solid-state reactions are often required. The existing UV absorbers mainly include salicylates, benzophenone...

Examples

Embodiment 1

[0050] Example 1 Preparation of CDs@CaF 2 composite nanoparticles

[0051] 1. Preparation of fluorescent carbon dots

[0052]Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 5h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0053] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0054] Select 11g of anhydrous calcium chloride and 4g of ammonium fluoride as raw materials, add water respectively according to the molar ratio of the two to 1:1.1 to prepare 20mL of solutions A and B for use, and part of the sol...

Embodiment 2

[0060] Example 2 Preparation of CDs@CaF 2 composite nanoparticles

[0061] 1. Preparation of fluorescent carbon dots

[0062] Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 10h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0063] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0064] Select 11g of anhydrous calcium chloride and 5.5g of ammonium fluoride as raw materials, and add water respectively according to the molar ratio of the two to 1:1.5 to prepare 20mL of solutions A and B for use, wherein par...

Embodiment 3

[0065] Example 3 Preparation of CDs@CaF 2 composite nanoparticles

[0066] 1. Preparation of Carbon Dots

[0067] Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 7h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0068] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0069] Select 11g of anhydrous calcium chloride and 7.5g of ammonium fluoride as raw materials, and add water at a molar ratio of 1:2 to prepare 20mL each of solutions A and B for use. Part of the solvent in solution A is 10mL of 0.5mg / mL car...

technical field

[0001] The invention belongs to the field of new materials, and in particular relates to a carbon dot composite nano particle, a carbon dot / fluoride composite material, a preparation method and an application. Background technique

[0002] Most of the existing materials have single light conversion, toughening or anti-aging effects, and they face problems such as high cost, high toxicity, complex reaction conditions, and environmental pollution. For example, the current light conversion agents are mostly rare earth-based doped fluorescent materials, but due to the limited rare earth resources on the earth, such materials are expensive, and the average market price per gram of rare earth metals is thousands of yuan; at the same time, rare earth-based doped fluorescent materials The synthesis conditions of materials are complicated, and high-temperature solid-state reactions are often required. The existing UV absorbers mainly include salicylates, benzophenone...

Examples

Embodiment 1

[0050] Example 1 Preparation of CDs@CaF 2 composite nanoparticles

[0051] 1. Preparation of fluorescent carbon dots

[0052]Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 5h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0053] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0054] Select 11g of anhydrous calcium chloride and 4g of ammonium fluoride as raw materials, add water respectively according to the molar ratio of the two to 1:1.1 to prepare 20mL of solutions A and B for use, and part of the sol...

Embodiment 2

[0060] Example 2 Preparation of CDs@CaF 2 composite nanoparticles

[0061] 1. Preparation of fluorescent carbon dots

[0062] Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 10h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0063] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0064] Select 11g of anhydrous calcium chloride and 5.5g of ammonium fluoride as raw materials, and add water respectively according to the molar ratio of the two to 1:1.5 to prepare 20mL of solutions A and B for use, wherein par...

Embodiment 3

[0065] Example 3 Preparation of CDs@CaF 2 composite nanoparticles

[0066] 1. Preparation of Carbon Dots

[0067] Weigh 1g of anhydrous citric acid and dissolve it in 30mL of deionized water, add 1.6mL of ethylenediamine (the mass ratio of anhydrous citric acid to ethylenediamine is 1:1.6), mix well and carry out hydrothermal reaction in an oven at 200°C for 7h , after natural cooling, the reaction solution was taken out, dialyzed at 1000D for 24 hours, the solution in the bag was distilled under reduced pressure and freeze-dried to obtain solid carbon dots (CDs), which were configured into an aqueous solution of carbon dots with a concentration of 0.5 mg / mL for future use.

[0068] 2. CDs@CaF 2 Preparation of Composite Nanoparticles

[0069] Select 11g of anhydrous calcium chloride and 7.5g of ammonium fluoride as raw materials, and add water at a molar ratio of 1:2 to prepare 20mL each of solutions A and B for use. Part of the solvent in solution A is 10mL of 0.5mg / mL car...

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