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Preparation method of fullerene-like structure carbon-based quantum dot

A technology of carbon-based quantum dots and fullerene structures, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., to achieve uniform thickness, good fluorescence and electrochemiluminescence activity, The effect of the simple preparation process

Inactive Publication Date: 2015-12-30
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many of the existing synthetic methods have the characteristics of simple operation, low cost, and high yield. However, the carbon cores of the carbon-based quantum dots obtained by these methods are basically graphite structures.
There are currently no reports on carbon-based quantum dots with other structures

Method used

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  • Preparation method of fullerene-like structure carbon-based quantum dot
  • Preparation method of fullerene-like structure carbon-based quantum dot
  • Preparation method of fullerene-like structure carbon-based quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 0.30 g of fullerene powder to 100 ml of 8 mol / L nitric acid solution, and reflux at 130°C for 48 hours; after the solution is naturally cooled to room temperature, filter it with filter paper, take out the filtrate, and control the temperature of the heater at 150°C, the resulting filtrate was evaporated to dryness to obtain a reddish-brown powder (about 0.13 g);

[0021] TEM and AFM (see figure 1 ) shows that the planar size of the fullerene structure carbon-based quantum dots obtained in the experiment is mainly distributed in the range of 7 to 20 nanometers, and the thickness is mainly distributed in the range of 0.4 to 1.3 nanometers; infrared spectrum (see figure 2 ) shows that the obtained fullerene carbon-based quantum dots contain a large number of pentagonal carbon structures, and the surface has a large number of carboxyl and hydroxyl groups. The prepared fullerene-structured carbon-based quantum dots have good optical properties, including fluorescence ...

Embodiment 2

[0023] Add 5.00 g of fullerene powder to 100 ml of 16 mol / L nitric acid solution, and reflux at 200°C for 72 hours; after the solution is naturally cooled to room temperature, filter it with filter paper, take out the filtrate, and control the temperature of the heater at 100°C, and evaporate the obtained filtrate to dryness to obtain a reddish-brown fullerene-structured carbon-based quantum dot powder.

Embodiment 3

[0025] Add 1.00 g of fullerene powder to 100 ml of 12 mol / L nitric acid solution, and reflux at 100°C for 24 hours; after the solution is naturally cooled to room temperature, filter it with filter paper, take out the filtrate, and control the temperature of the heater The resulting filtrate was evaporated to dryness at 200°C to obtain a reddish-brown fullerene-structured carbon-based quantum dot powder.

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Abstract

The invention provides a preparation method of a fullerene-like structure carbon-based quantum dot. The preparation method comprises the following steps of adopting fullerene as raw materials and concentrated nitric acid as oxidizing agent, carrying out a simple chemical oxidation process, and carrying out subsequent simple filtering and evaporating processing to obtain a large amount of water-soluble fullerene-like structure carbon-based quantum dots. The plane dimension of the obtained fullerene-like structure carbon-based quantum dots is mainly ranged from 7nm to 20nm, and the thickness of the obtained fullerene-like structure carbon-based quantum dots is mainly ranged from 0.4-1.3nm. A large amount of oxygen-containing functional groups such as hydroxyl and carboxyl are contained on the surfaces of the fullerene-like structure carbon-based quantum dots. The material has favorable fluorescent property and electrochemiluminescence activity. The preparation method has the advantages of high efficiency, quickness, simplicity, low cost, high operability and the like.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing carbon-based quantum dots with a fullerene structure. Background technique [0002] Carbon-based quantum dots refer to nanomaterials composed of carbon nanomaterials with certain luminescence activity, mainly including carbon quantum dots and graphene quantum dots. Carbon quantum dots refer to carbon nanoparticles with a particle diameter of less than 10 nanometers, while graphene quantum dots refer to single-layer or multi-layer graphene nanosheets with a diameter of less than 100 nanometers. Compared with traditional quantum dots, carbon-based quantum dots have the advantages of simplicity, low cost, optical stability, good hydrophilicity, easy surface modification and good biocompatibility, etc., and have broad applications in analysis, detection and biological imaging. The application prospect has gradually become a hot spot that people pay attentio...

Claims

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Application Information

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IPC IPC(8): C01B31/02C09K11/65B82Y30/00
Inventor 董永强池毓务吴唤
Owner FUZHOU UNIVERSITY
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