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

Method for synthesizing S and N co-doped carbon dots

A synthesis method and co-doping technology, applied in the field of synthesis of S, can solve the problems of affecting the synthesis method of carbon dots, limited efficiency of carbon dots, and difficult to meet actual production.

Inactive Publication Date: 2019-06-28
SOUTHWEST PETROLEUM UNIV
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current bottom-up methods need to be carried out in a solvent, and some toxic solvents will affect the choice of carbon dot synthesis; the efficiency of the solvent method to produce carbon dots is also very limited, and it is difficult to meet the actual production needs.

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
  • Method for synthesizing S and N co-doped carbon dots
  • Method for synthesizing S and N co-doped carbon dots
  • Method for synthesizing S and N co-doped carbon dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using this method to synthesize S, N co-doped carbon dots (S,N-CDs), and with P25TiO 2 Composite for the degradation of nitric oxide (NO) indoors, the specific experimental steps are as follows:

[0023] A, 1.05g citric acid and 1.14g thiourea are fully mixed and ground;

[0024] B. Transfer the mixed precursor to a 50mL reactor, and react at 160°C for 6h;

[0025] C. Add the reacted solid into 2mol / L NaOH solution, then centrifuge at 10000rpm for 30min to separate insoluble impurities and solution;

[0026] D, utilizing a 0.22 μm microporous membrane to filter the solution obtained in step C;

[0027] E. Utilize the dialysis bag with a molecular weight cut-off of 2000D to seal the solution obtained in step D, put it into deionized water for dialysis treatment for 24 hours, finally collect the liquid in the dialysis bag, and freeze-dry to obtain a carbon dot solid;

[0028] F, 0.2g P25TiO 2 Add 2 mL of carbon dot solution with a concentration of 2 mg / mL to 16 mL of ...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention aims to provide a method for synthesizing S and N co-doped carbon dots under a solid phase condition. The method comprises the following specific steps of: A, fully mixing and grinding citric acid and thiourea; B, transferring the mixed precursor into a reaction kettle, and performing reaction for a plurality of hours at a certain temperature; C, adding the reacted solid into a NaOHsolution with a certain concentration, and centrifuging to separate insoluble impurities from the solution; D, filtering the solution obtained in the step C by using a microporous film; and E, sealingthe solution obtained in the step D by using a dialysis bag, putting the solution into deionized water for dialysis for a certain time, and finally collecting the liquid in the dialysis bag, and freeze-drying to obtain carbon dot solids. Compared with the prior art, the carbon dots prepared by the method have good fluorescence performance and photocatalytic enhancement function, and the preparedcarbon dots have the advantages of uniform size, less impurities, simple and convenient synthesis process and high application value.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a method for synthesizing S, N co-doped carbon dots under solid phase conditions. Background technique [0002] Carbon dots are carbon nanomaterials with three-dimensional dimensions less than 10nm, mainly composed of carbon elements. The surface of carbon dots contains organic functional groups such as hydroxyl and carboxyl groups, so carbon dots have strong water solubility; at the same time, due to the quantum confinement effect and special chemical composition of carbon dots, the fluorescence characteristics, biocompatibility and The low toxicity is remarkable, and it has received extensive attention in research in various fields (luminescent materials, bioimaging, ion detection, photocatalysis, etc.). The synthesis methods of carbon dots can be divided into two categories: top-down method and bottom-up method. The top-down method mainly uses arc discharge, l...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00
Inventor 周莹钟云倩于姗李意张骞饶志强
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com