Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Water-soluble carbon quantum dot and preparation method thereof

A carbon quantum dot and water-soluble technology, which is applied in the field of water-soluble carbon quantum dots and its synthesis, can solve the problems of low yield of carbon nanoparticles, and achieve the effects of short preparation cycle, good stability and good repeatability

Inactive Publication Date: 2013-06-26
SUZHOU UNIV
View PDF3 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are often limited to complex processes or harsh preparation conditions, and some simple preparation methods are also accompanied by great energy consumption, the yield of prepared carbon nanoparticles is low, and surface modification or further functionalization are required Only the reaction can shine

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water-soluble carbon quantum dot and preparation method thereof
  • Water-soluble carbon quantum dot and preparation method thereof
  • Water-soluble carbon quantum dot and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (a) Take 4g of glucose powder as a raw material, dissolve it in 35mL of deionized water, stir well until it is completely dissolved, then add 2mL of 0.03mol / L AgNO 3 solution, fully stirred for 5 minutes to obtain a precursor solution;

[0026] (b) Transfer the above precursor solution into the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, heat it in an oven at 180°C for 2 hours, and cool it down to room temperature naturally to obtain a suspension;

[0027] (c) The above-mentioned suspension was centrifuged at 8000r / min for 20min to obtain a clear solution, which was an aqueous solution A of water-soluble fluorescent carbon quantum dots. This solution was dialyzed with an ultrafiltration membrane with a molecular weight cut-off of 10kD, and obtained after vacuum drying. quantum dots.

[0028] Referring to accompanying drawing 1, it is the emission spectrogram of the water-soluble fluorescent carbon quantum dot prepared by the present embodiment, a...

Embodiment 2

[0034] (a) Take 4g of glucose powder as a raw material, dissolve it in 35mL of deionized water, stir well until it is completely dissolved, then add 2mL of 0.03mol / L AgNO 3 solution, fully stirred for 5 minutes to obtain a precursor solution;

[0035] (b) Transfer the above precursor solution into the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, heat it in an oven at 180°C for 3 hours, and cool it down to room temperature naturally to obtain a suspension;

[0036] (c) The above-mentioned suspension is centrifuged at 8000r / min for 20min to obtain a clear solution, which is the aqueous solution B of water-soluble fluorescent carbon quantum dots. This solution is dialyzed with an ultrafiltration membrane with a molecular weight cut-off of 10kD, and obtained after vacuum drying. carbon quantum dots.

Embodiment 3

[0038] (a) Take 4g of glucose powder as a raw material, dissolve it in 35mL of deionized water, stir well until it is completely dissolved, then add 1mL of 0.03mol / L AgNO 3 solution, fully stirred for 5 minutes to obtain a precursor solution;

[0039] (b) Transfer the above precursor solution into the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, heat it in an oven at 180°C for 2 hours, and cool it down to room temperature naturally to obtain a suspension;

[0040] (c) The above-mentioned suspension is centrifuged at 8000r / min for 20min to obtain a clear solution, which is the aqueous solution C of water-soluble fluorescent carbon quantum dots. The solution is dialyzed with an ultrafiltration membrane with a molecular weight cut-off of 10kD, and obtained after vacuum drying. carbon quantum dots.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a water-soluble carbon quantum dot and a preparation method thereof. The preparation method of the water-soluble carbon quantum dot comprises the following steps of: sealing a mixed solution to a hydrothermal kettle for carrying out hydrothermal reaction by using aldehyde group-containing saccharide carbohydrate as a carbon source and using noble metal salts as an oxidant and catalyst; centrifuging and separating the obtained product to obtain an aqueous solution of the carbon quantum dot; separating the aqueous solution through an ultra-filtration centrifugal tube or an ultra-filtration membrane, collecting the filtered solution, drying the filtered solution under vacuum to obtain the carbon quantum point. The carbon quantum dot prepared by the preparation method disclosed by the invention can stably exist in the aqueous solution for a long time, is uniform in dimension distribution, high in fluorescence intensity and adjustable in light-emitting wavelength with the laser wavelength. Meanwhile, the surface of the carbon quantum dot is rich in carboxyl and hydroxyl, easy to realize surface functionalization and capable of being extensively applied to the fields including the biological field, the chemical field, the material field and the like. The preparation method disclosed by the invention is simple, good in repeatability, easily available in materials, short in preparation period, low in cost and easy for popularization.

Description

technical field [0001] The invention relates to a water-soluble carbon quantum dot with adjustable fluorescence and a synthesis method thereof. Background technique [0002] Carbon quantum dots are a new type of nanomaterial with carbon as the skeleton structure discovered in 2004. Compared with traditional semiconductor quantum dots, carbon quantum dots, as a new type of luminescent nanomaterial, not only maintain the low toxicity of carbon materials, biological Good compatibility, etc., and has the advantages of adjustable luminescence range, large two-photon absorption cross section, good photostability, no light flicker, easy large-scale synthesis, etc., and basically does not damage cells, especially when labeling living organisms. Unique advantages, has been widely concerned. Compared with some organic biofuels, its advantages lie in its relatively high stability and strong resistance to photobleaching. The size of this new type of fluorescent carbon na...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/02C09K11/65C01B32/15
Inventor 李伟峰周璇龙玉梅张敏陈流敏
Owner SUZHOU UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com