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A hollow fluorescent carbon quantum dot and its preparation method and application

A carbon quantum dot and fluorescence technology, which is applied in the field of hollow fluorescent carbon quantum dots and their preparation, can solve the problems of unfavorable continuous and large-scale production of carbon quantum dots, low fluorescence quantum yield of carbon quantum dots, non-renewable energy, etc. Conditions require no energy consumption, good solubility and dispersion, stable optical properties

Inactive Publication Date: 2018-04-24
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Top-down methods mainly include arc discharge, laser ablation, electrochemical oxidation, electron beam radiation, etc. These methods often require strict experimental conditions or special energy, and the cost is high. lower rate; bottom-up methods mainly include combustion method, hydrothermal carbonization method, supported synthesis method, microwave method, ultrasonic method, etc., but because the raw materials selected by such methods are all non-renewable energy and require strict post-processing technology, so it is not conducive to the continuous and large-scale production of carbon quantum dots

Method used

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  • A hollow fluorescent carbon quantum dot and its preparation method and application
  • A hollow fluorescent carbon quantum dot and its preparation method and application
  • A hollow fluorescent carbon quantum dot and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Step 1, weigh 1.0g of glucose and place it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain a dark brown sticky substance;

[0037] Step 2, after the glass container is naturally cooled, add 20mL of secondary water to it, stir and dissolve to obtain a dark brown solution, filter to remove insoluble matter to obtain a clear dark brown solution, remove impurities by dialysis, and obtain pure hollow carbon quantum dots aqueous solution;

[0038] In step 3, the hollow carbon quantum dot aqueous solution is freeze-dried to obtain the hollow carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 9.4%.

[0039] Characterization and application see Figure 1-13 .

Embodiment 2

[0041] Step 1, weigh 1.0g of sucrose and place it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain a dark brown sticky substance;

[0042] Step 2, after the glass container is naturally cooled, add 22mL of secondary water therein, and the rest are the same as in Example 1;

[0043] Its relative quantum yield (based on quinine sulfate) is 8.7%.

Embodiment 3

[0045] Step 1, weigh 1.0g of fructose and put it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain a dark brown sticky substance;

[0046] Step 2, after the glass container is naturally cooled, 25mL of secondary water is added thereto, and the rest are the same as in Example 1;

[0047]Its relative quantum yield (based on quinine sulfate) is 4.2%.

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Abstract

The invention provides hollow fluorescent carbon quantum dots as well as a preparation method and application thereof and belongs to the technical field of light-emitting nano materials. The preparation method comprises the following steps: adding ethanediamine and concentrated acid into water soluble saccharides serving as a carbon source, so as to obtain a puce viscous material; after reaction stops, naturally cooling a glass container, adding a certain amount of secondary water, stirring for dissolving to obtain a dark brown solution, and dialyzing to remove impurities, thereby obtaining a hollow carbon quantum dot aqueous solution; and freeze-drying to obtain the hollow carbon quantum dots. The preparation method is simple in process, wide in raw material source, low in price, low in preparation condition requirement, and free from energy consumption; the obtained hollow carbon quantum dots are relatively high in yield, small in particle diameter and uniform in size; the preparation method is capable of realizing batch production; the obtained hollow carbon quantum dots can be used for anticancer drug carriers, are capable of reducing the toxic and side effects of anticancer drugs and also can be used in detection of VI ions in water.

Description

technical field [0001] The invention relates to a luminescent nanometer material, in particular to a carbon quantum dot, and specifically belongs to a hollow fluorescent carbon quantum dot and its preparation method and application. Background technique [0002] In recent years, quantum dots have received great attention and extensive research due to their superior optical and electrical properties. As quasi-zero-dimensional nanomaterials, they have superior properties such as quantum confinement effects, surface effects, and size effects. Therefore, quantum dots It has been well applied in optical devices, electrical devices, biological imaging, and biological drug loading. Traditional quantum dots are mostly researched on semiconductor quantum dots (such as CdSe, PbTe, CdTe, etc.), and their applications in the field of biomedicine, especially in dynamic tracking and imaging of cells and living bodies, have shown great potential. The introduction of heavy metal elements i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65A61K49/00A61K47/04A61K31/704A61P35/00G01N21/64
CPCA61K31/704A61K47/02A61K49/0019A61K49/0067C09K11/65G01N21/643G01N21/6486G01N2021/6432
Inventor 弓晓娟张庆燕宋胜梅双少敏董川
Owner SHANXI UNIV
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