Method for preparing solid room-temperature phosphorescent carbon dots by one-pot process

A room temperature phosphorescence and carbon dot technology, applied in the field of nanomaterial manufacturing, can solve the problems of limiting the development and application of materials, cumbersome operation process, etc., and achieve the effects of stable optical properties, simple operation steps and high yield

Active Publication Date: 2018-10-16
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 interfere

Method used

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  • Method for preparing solid room-temperature phosphorescent carbon dots by one-pot process
  • Method for preparing solid room-temperature phosphorescent carbon dots by one-pot process
  • Method for preparing solid room-temperature phosphorescent carbon dots by one-pot process

Examples

Experimental program
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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 method for preparing solid room-temperature phosphorescent carbon dots by a one-pot process. The method comprises the steps of subjecting benzenediboronic acid and saccharose, which serve as raw materials, to a reaction for 2 to 8 hours at the temperature of 120 DEG C to 180 DEG C by taking water as a solvent on the basis of a hydrothermal method, and carrying out purification and freeze drying, thereby obtaining the solid room-temperature phosphorescent carbon dots. The method is easy and feasible, is readily available in raw material, is free of low-temperature andoxygen-free environments, is free of any matrix addition and has a potential application value in the fields of anti-counterfeiting, information ciphering, optical devices and the like.

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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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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