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A One-Pot Method for Preparation of Solid Room-Temperature Phosphorescent Carbon Dots

A technology of room temperature phosphorescence and carbon dots, which is applied in the field of nanomaterial manufacturing, can solve the problems of limiting the development and application of materials, cumbersome operation process, etc., and achieves the effects of stable optical properties, simple operation steps, and environmental friendliness.

Active Publication Date: 2021-03-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, researchers have embedded carbon dots in a variety of matrices (including polyvinyl alcohol polyurethane, aluminum potassium sulfate, etc.) to avoid the interference of oxygen and moisture on the phosphorescence properties, but the operation process is too cumbersome, which limits the further development and application of materials

Method used

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  • A One-Pot Method for Preparation of Solid Room-Temperature Phosphorescent Carbon Dots
  • A One-Pot Method for Preparation of Solid Room-Temperature Phosphorescent Carbon Dots
  • A One-Pot Method for Preparation of Solid Room-Temperature Phosphorescent Carbon Dots

Examples

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Effect test

Embodiment 1

[0023] A method for preparing solid room temperature phosphorescent carbon dots in one pot, the steps are as follows:

[0024] Step 1: Weigh 0.011 g of terephthalic acid and 0.011 g of sucrose (molar mass ratio is 2:1) respectively and place them in a sample bottle, add 5 mL of distilled water, stir well, and use it as a precursor solution;

[0025] Step 2: Place the sample bottle containing the precursor solution in a hydrothermal reaction kettle, place the reaction kettle in an oven, and heat to 140 o C, reaction 2h, naturally cool to room temperature, obtain product;

[0026] Step 3: Treat the product obtained in Step 2 with a 0.22 μm filter membrane to remove large particles;

[0027] Step 4: Treat the product treated in Step 3 with a 1 KDa dialysis bag for 24 hours to remove unreacted raw materials;

[0028] Step 5: Vacuum freeze-dry the phosphorescent carbon dot aqueous solution obtained above to obtain white solid phosphorescent carbon dot powder. The fluorescence em...

Embodiment 2

[0031] A method for preparing solid room temperature phosphorescent carbon dots in one pot, the steps are as follows:

[0032] Step 1: Weigh 0.011 g of terephthalic acid and 0.023 g of sucrose (molar mass ratio is 1:1) respectively, place them in a sample bottle, add 5 mL of distilled water, stir well, and use it as a precursor solution;

[0033] Step 2: Place the sample bottle containing the precursor solution in a hydrothermal reaction kettle, place the reaction kettle in an oven, and heat to 140 o C, reaction 2h, naturally cool to room temperature, obtain product;

[0034] Step 3: Treat the product obtained in Step 2 with a 0.22 μm filter membrane to remove large particles;

[0035] Step 4: Treat the product treated in Step 3 with a 1 KDa dialysis bag for 24 hours to remove unreacted raw materials;

[0036] Step 5: Vacuum freeze-dry the phosphorescent carbon dot aqueous solution obtained above to obtain white solid phosphorescent carbon dot powder.

Embodiment 3

[0038] A method for preparing solid room temperature phosphorescent carbon dots in one pot, the steps are as follows:

[0039] Step 1: Weigh 0.011 g of terephthalic acid and 0.045 g of sucrose (molar mass ratio is 1:2) respectively and place them in a sample bottle, add 5 mL of distilled water, stir well, and use it as a precursor solution;

[0040] Step 2: Place the sample bottle containing the precursor solution in a hydrothermal reaction kettle, place the reaction kettle in an oven, and heat to 140 o C, reaction 2h, naturally cool to room temperature, obtain product;

[0041] Step 3: Treat the product obtained in Step 2 with a 0.22 μm filter membrane to remove large particles;

[0042] Step 4: Treat the product treated in Step 3 with a 1 KDa dialysis bag for 24 hours to remove unreacted raw materials;

[0043] Step 5: Vacuum freeze-dry the phosphorescent carbon dot aqueous solution obtained above to obtain white solid phosphorescent carbon dot powder.

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Abstract

The invention relates to a one-pot method for preparing solid room-temperature phosphorescent carbon dots. The method is based on a hydrothermal method, using terephthalic acid and sucrose as raw materials, using water as a solvent, reacting at 120-180°C for 2-8 hours, and purifying and freeze-drying to obtain solid room temperature phosphorescent carbon dots. The method is simple, easy to obtain raw materials, does not require low temperature, oxygen-free environment, and does not need to add any matrix, and has potential application value in anti-counterfeiting, information encryption, optical devices and other fields.

Description

technical field [0001] The invention relates to the field of nanomaterial manufacturing, in particular to a method for preparing solid room-temperature phosphorescent carbon dots in a "one-pot method" using terephthalic diboronic acid and sucrose as raw materials. Background technique [0002] As one of the delayed luminescence phenomena, phosphorescence has attracted extensive attention in recent years. Because of its long time life and high luminous efficiency, it has important research value in the fields of optoelectronics, photocatalysis, imaging and safety. At present, people have made a lot of attempts to obtain room temperature phosphorescent materials. One part is mainly based on organometallic complexes (such as iridium, platinum and other noble metals), but they are generally expensive and toxic; the other part is based on pure organic compounds (no metals), but synthetically more complicated. Therefore, it is necessary to develop a room temperature phosphoresc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/65
Inventor 李朝辉耿欣孙远强梁增强屈凌波
Owner ZHENGZHOU UNIV
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