Rapid synthesis method for high-quantum-yield fluorescent carbon dots

A technology of fluorescent carbon dots and a synthesis method, applied in the fields of chemistry and nanomaterials science, can solve the problems of unfavorable continuous and large-scale production of fluorescent carbon quantum dots, low carbon quantum yield, non-renewable energy, etc. The effect of high yield and simple operation

Inactive Publication Date: 2015-08-19
GUANGXI TEACHERS EDUCATION UNIV
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method often requires strict experimental conditions and special energy sources, the cost is high, and the obtained carbon quantum yield is relatively low
Bottom-up synthesis method, that is, direct synthesis of fluorescent carbon quantum dots by pyrolysis or carbonization of suitable prec

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
  • Rapid synthesis method for high-quantum-yield fluorescent carbon dots
  • Rapid synthesis method for high-quantum-yield fluorescent carbon dots
  • Rapid synthesis method for high-quantum-yield fluorescent carbon dots

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A method for synthesizing fast and high quantum yield fluorescent carbon dots, comprising the following steps:

[0029] 1) citric acid monohydrate and ethylenediamine are mixed and stirred to obtain a mixed solution;

[0030] 2) The mixed solution of step 1) was placed in a microwave reactor whose model was CEM Discover and reacted, and the temperature was set to 130 °C;

[0031] 3) cooling to obtain a brown liquid product, inject the brown liquid product into a dialysis bag for dialysis, the molecular weight of the dialysis bag is 500Da, collect the liquid in the dialysis bag, carry out rotary evaporation concentration, and freeze-dry the concentrated sample to obtain Fluorescent carbon dots.

[0032] Wherein, the conditions of the rotary evaporation concentration are as follows: the temperature of the rotary evaporator is set to 50° C., and the time of the rotary evaporation is set to be 10 min.

[0033] Wherein, in the step 3), the solution afte...

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

No PUM Login to view more

Abstract

The invention discloses a rapid synthesis method for high-quantum-yield fluorescent carbon dots. The method comprises the following steps: (1) mixing citric acid monohydrate and ethylenediamine, and uniformly stirring to obtain a mixed solution; (2) adding the mixed solution in the step (1) into a microwave reactor for reaction, and setting the temperature as 130 DEG C; (3) cooling to obtain a brown liquid product, injecting the brown liquid product into a dialysis bag for dialysis, collecting liquid in the dialysis bag, performing rotary evaporation concentration, and freeze-drying concentrated samples to obtain the fluorescent carbon dots, wherein the molecular weight of the dialysis bag is 500Da. The operation is simple, and raw materials are easily obtained and cheap. Reaction conditions can be regulated, the quantum yield of the obtained carbon quantum dots is high, the problem that rapid large-scale production cannot be carried out by a conventional fluorescent carbon dot preparation method due to the limitation of a process and the raw materials is solved, and the problem of lower quantum yield of the carbon quantum dots is solved. The fluorescent carbon dots can be used for metal ion detection, biological marking, biological imaging and the like.

Description

technical field [0001] The invention relates to the fields of chemistry and nanometer material science, more specifically, the invention relates to a method for synthesizing fast and high-quantum-yield fluorescent carbon dots. Background technique [0002] Carbon quantum dots are the most important kind of fluorescent carbon nanomaterials, also known as carbon dots, carbon nanodots and carbon nanocrystals, which are monodisperse and nearly quasi-spherical in size below 10nm Emerging carbon nanofunctional materials. Compared with traditional semiconductor quantum dots and organic dyes, fluorescent carbon quantum dots have small particle size, good water solubility, high chemical inertness, easy functionalization, photobleaching resistance, low toxicity, and good biocompatibility. The preparation methods of quantum dots and organic dyes are cumbersome, expensive, environmentally unfriendly, and prone to photobleaching and other problems. [0003] The application of fluoresce...

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): C09K11/65B82Y20/00B82Y40/00
Inventor 黄珊肖琦朱发伟黄初升盛家荣
Owner GUANGXI TEACHERS EDUCATION UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products