Pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles

A carbon nanoparticle and synthesis method technology, applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems that are not suitable for large-scale preparation, complex post-processing, strong acid oxidation, etc., and achieve low price, simple process method, The effect of easy operation

Inactive Publication Date: 2010-07-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are not suitable for large-scale preparation, and require complex post-treatments, some such as strong acid oxidation, and some also use relatively expensive equipment and reagents, etc.

Method used

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  • Pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles
  • Pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles
  • Pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles

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Effect test

Embodiment 1

[0022] Embodiment 1: The specific preparation steps of this embodiment are as follows:

[0023] (1) First, weigh 1.0 g of EDTA-2Na with an electronic balance, and evenly spread it on the bottom of the quartz boat.

[0024] (2) Put the quartz boat into the tube furnace, N 2 It was calcined at 400°C for 2 hours under protection, and the heating rate was 10°C / min. After calcining, the sample was ground into powder.

[0025] (3) Spread the obtained powder evenly on the bottom of the quartz boat, put it into a tube furnace, and anneal at 400° C. for 15 minutes in air, then take out the quartz boat, and collect the sample powder after cooling.

[0026] (4) Dissolve the obtained powder in 10 mL of ethanol, place it in an ultrasonic oscillator for 5 to 10 minutes, and centrifuge at a high speed (15,000 rpm) to obtain the supernatant, repeat 2-3 times, and concentrate the supernatant by rotary evaporation ( Contains a small amount of ethanol).

[0027] (5) Pour the concentrated solu...

Embodiment 2

[0028] Embodiment 2: The specific preparation steps of this embodiment are as follows:

[0029] (1) First, weigh 1.0 g of EDTA-4Na with an electronic balance, and evenly spread it on the bottom of the quartz boat.

[0030] (2) Put the quartz boat into the tube furnace, N 2 It was calcined at 400°C for 2 hours under protection, and the heating rate was 10°C / min. After calcining, the sample was ground into powder.

[0031] (3) Dissolve the obtained powder in 10 mL of ethanol, place it in an ultrasonic oscillator for 5 to 10 minutes, and centrifuge at a high speed (15,000 rpm) to obtain the supernatant, repeat 2-3 times, collect the supernatant, and rotavap It is concentrated (contains a small amount of ethanol).

[0032] (4) Pour the concentrated solution into a 50mL beaker and dry in an oven at a temperature of 60-80°C for 7-16 hours to finally obtain water-soluble fluorescent carbon nanoparticles.

[0033] The raw materials EDTA-2Na and EDTA-4Na used in the above examples w...

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Abstract

The invention relates to a pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles, which belongs to the technical field of nano-carbon material preparation processes. A main process of the method comprises: calcining ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) or ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) sold on market in a tube furnace under the protection of N2 gas at 400 DEG C for 2 to 3 hours; grinding a sample into powder after calcination; dissolving the obtained powder in a certain amount of ethanol; placing the obtained product in an ultrasonic oscillator for 5 to 10 minutes of ultrasonic treatment; performing high-speed ion separation to obtain supernatant; subjecting the supernatant to rotary evaporation to obtain concentrated solution; pouring the concentrated solution into a beaker; and putting the beaker into an oven for drying so as to obtain the water-soluble fluorescent carbon nano-particles. The product of the invention can be applicable to the field of biomedicine and the application field of luminescent electronic devices.

Description

technical field [0001] The invention relates to a pyrolysis synthesis method of water-soluble fluorescent carbon nanoparticles, which belongs to the technical field of nano-carbon material preparation technology. Background technique [0002] Fluorescent nanomaterials are widely used in display technology, semiconductor lighting, lasers, and fluorescent labeling of cells. Among them, the application of fluorescent nanomaterials in biomedicine has attracted great attention from the scientific and technological circles. Semiconductor quantum dot fluorescent materials represented by CdSe were the first to be used as fluorescent probes for fluorescence observation of cells. However, with the evaluation of biological effects, it was found that such materials are not suitable for clinical applications (fluorescence observation of living cells). The main concern is that it contains metal ions that are highly toxic to cells. This is an insurmountable challenge for the application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82B3/00
Inventor 潘登余张景春吴超吴明红李珍
Owner SHANGHAI UNIV
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