Method for preparing fluorescent carbon quantum dots through electric spark discharge

A technology of carbon quantum dots and electric sparks, which is applied in the field of electric spark discharge to prepare fluorescent carbon quantum dots, can solve the problems of low efficiency and complicated preparation process of fluorescent carbon quantum dots, and achieve the advantages of convenient operation, simple and reliable equipment, and increased cost Effect

Inactive Publication Date: 2017-01-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the current preparation process of fluorescent carbon quantum dots is complicated and the efficiency is not high

Method used

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  • Method for preparing fluorescent carbon quantum dots through electric spark discharge
  • Method for preparing fluorescent carbon quantum dots through electric spark discharge
  • Method for preparing fluorescent carbon quantum dots through electric spark discharge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, such as figure 1 as shown,

[0026] A method for preparing fluorescent carbon quantum dots by electric spark discharge has the following steps:

[0027] 1. Submerge the upper and lower electrodes 1 of the EDM equipment in the organic medium 2 in the working liquid tank 5, and connect the two electrodes 1 to the two poles of the pulse power supply 3 respectively;

[0028] 2. Control the electrode spacing between the two electrodes 1 through the servo control system 4, so that a continuous pulse discharge is generated between the two electrodes 1, and the organic medium 2 between the electrodes is cracked by the pulse discharge to form carbon atoms. The existence of carbon atoms is unstable, so they will eventually agglomerate to form carbon quantum dots, and the diameter of carbon quantum dots is 1-5nm;

[0029] 3. Since no other impurities are introduced during the preparation process, after the preparation is completed, after standing still for 1-10 hours,...

Embodiment 2

[0036] Example 2, such as figure 2 as shown,

[0037] Compared with Embodiment 1, the difference is that the electrode 1 is an array electrode, and the array electrode is a whole composed of a plurality of electrode units 1-1, and the plurality of electrode units 1-1 are insulated from each other by an insulating material 1-2. Each electrode unit 1-1 forms a pair with one electrode unit 1-1 in another array electrode, and each pair of electrode units 1-1 is respectively connected to two poles of a pulse power supply 3 that is isolated from each other. Electrode unit 1-1 is a high-purity graphite electrode with a carbon content >99.99%.

[0038] Take the organic medium as kerosene as an example to further explain:

[0039] During the preparation process, each electrode has five mutually insulated electrode units 1-1, and each pair of electrode units 1-1 is respectively connected to two poles of a pulse power supply 3 that is isolated from each other. The open circuit voltag...

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Abstract

The invention relates to a method for preparing fluorescent carbon quantum dots through electric spark discharge. Two electrodes are soaked with an organic medium, and the two electrodes are connected with two poles of a pulse power supply respectively. The interval between the two electrodes is controlled, continuous pulse discharge is generated between the two electrodes, the organic medium between the electrodes is split through pulse discharge, and the carbon quantum dots are obtained. The method has the advantages that efficient, safe, low-cost, pure and continuous preparation is achieved, and the fluorescence property of the prepared carbon quantum dots is good.

Description

technical field [0001] The invention relates to a method for preparing fluorescent carbon quantum dots by electric spark discharge. Background technique [0002] Carbon quantum dots are a new type of fluorescent nanomaterials, which have higher strength, biocompatibility, and luminescence stability, and have become a hot research topic today. A large number of studies have shown that the toxicity of materials is closely related to composition, size, shape, and surface properties. For example, semiconductor fluorescent nanoparticles (FNPs) containing toxic elements or heavy metals basically cannot be applied in vivo. For materials with benign performance such as ZnO, Si, SiO 2 、TiO 2 As the size decreases, the toxicity becomes stronger and stronger. At the same size, carbon quantum dots have the lowest toxicity among all materials and are easy to realize multifunctionality on the surface, so choosing carbon nanoparticles as fluorescent labeling materials is the most ideal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/00
CPCB23H1/00
Inventor 张伟王辉
Owner CHANGZHOU UNIV
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