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

Synthetic method and application for water-soluble nitrogen-iron co-doped carbon dot

A co-doping and water-soluble technology, which is applied in the field of nanomaterial science and application, can solve the problems of complex process, low carbon dot fluorescence quantum yield, and high carbon dot fluorescence quantum yield, and achieve simple equipment and complex equipment operation , Highly reproducible effect

Inactive Publication Date: 2019-03-05
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved: In order to solve the problems of complex process and low fluorescence quantum yield of carbon dots in the preparation of carbon dots, the present invention provides a synthesis method and application of water-soluble nitrogen-iron co-doped carbon dots, which is used to prepare carbon dots The dot operation is simple, the fluorescence quantum yield of the carbon dot is high, the water solubility is good, and it is suitable for mass production

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
  • Synthetic method and application for water-soluble nitrogen-iron co-doped carbon dot
  • Synthetic method and application for water-soluble nitrogen-iron co-doped carbon dot
  • Synthetic method and application for water-soluble nitrogen-iron co-doped carbon dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 Preparation of nitrogen-iron co-doped carbon dots

[0043] Dissolve 1g of ferric ammonium citrate and 0.8g of urea in 30mL of deionized water, transfer it to a 100mL reaction kettle, seal it and perform a hydrothermal reaction at 180°C for 6 hours, cool to room temperature, and use an appropriate amount of NaOH to obtain a reddish-brown precipitate. The precipitate was removed by rotating speed centrifugation to obtain a light yellow transparent solution, which was neutralized to neutral with HCl solution, dialyzed for 48 hours, and dried in a freeze dryer for 48 hours to obtain carbon dot powder co-doped with nitrogen and iron.

[0044] see figure 1 A, is the scanning electron micrograph of the carbon dots synthesized under this condition and the carbon dot size distribution. It can be seen from the figure that the obtained nitrogen-iron co-doped carbon dots have a spherical structure with uniform size and an average particle size of 4.5 nm, good dispersi...

Embodiment 2

[0048] Embodiment 2 Preparation of nitrogen-iron co-doped carbon dots

[0049] Dissolve 1g of ferric ammonium citrate in 30mL of deionized water, transfer it to a 100mL reaction kettle, seal it, and conduct a hydrothermal reaction at 180°C for 6 hours, cool to room temperature, use an appropriate amount of NaOH to obtain a reddish-brown precipitate, and centrifuge at 7000rpm to remove the precipitate , to obtain a light yellow transparent solution, which was neutralized to neutral with HCl solution, dialyzed for 48 h, and dried in a freeze dryer for 48 h to obtain nitrogen-iron co-doped carbon dot powder.

[0050] see figure 1 B, is the scanning electron micrograph of the carbon dots synthesized under this condition and the carbon dot size distribution diagram. It can be seen from the figure that the obtained nitrogen-iron co-doped carbon dots have a spherical structure with uniform size and an average particle size of 2.6nm, good dispersion, no obvious coagulation.

Embodiment 3

[0051] Example 3 An ion detection application evaluation experiment with water-soluble nitrogen-iron co-doped carbon dots in this experimental mode.

[0052] Test 1: Dissolve 1g of ferric ammonium citrate and 0.8g of urea in 30mL of deionized water, transfer it to a 100mL reaction kettle, seal it and perform hydrothermal reaction at 180°C for 6h, cool to room temperature, and use an appropriate amount of NaOH to obtain a reddish-brown precipitate , centrifuged at 7000rpm to remove the precipitate to obtain a light yellow transparent solution, which was neutralized to neutral with HCl solution, dialyzed for 48 hours, and dried in a freeze dryer for 48 hours to obtain carbon dot powder co-doped with nitrogen and iron .

[0053] Experiment 2: Use a fluorescence spectrophotometer to detect the effect of the fluorescence intensity of the carbon dots obtained in Experiment 1 on the pH value of the solution. Figure 5 Fluorescence of carbon dots measured at different pH values. It c...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synthetic method and an application for a water-soluble nitrogen-iron co-doped carbon dot, belonging to the fields of science and application of nanometer materials. The preparation method provided by the invention comprises the following steps: with ammonium ferric citrate as a carbon source and urea as a nitrogen source, dissolving the ammonium ferric citrate and the urea in deionized water, performing a one-step hydrothermal reaction under a closed condition, after an obtained product is cooled, removing free Fe<3+> from the obtained product with NaOH so as to obtain a pale yellow transparent solution, subjecting the solution to dialysis treatment, and carrying out freeze-drying so as to obtain the N-Fe co-doped carbon dot. The synthetic method provided by theinvention has the advantages of simple required operation, cheap and easily-available raw materials, low requirements on equipment and good repeatability. The N-Fe co-doped carbon dot prepared by using the synthetic method provided by the invention has the following advantages: water solubility is good; photoluminescence properties are excellent; the yield of fluorescence quantum is high; the N-Feco-doped carbon dot is successfully applied to ion detection; the N-Fe co-doped carbon dot is broadened in detection range and reduced in detection limit during detection of the metal ion Fe<3+>; andthe N-Fe co-doped carbon dot has great application prospects in the aspects of detection of Fe<3+> in sewage, drinking water and blood, etc.

Description

technical field [0001] The invention relates to the field of nanomaterial science and application, in particular to a synthesis method and application field of water-soluble nitrogen-iron co-doped carbon dots. Background technique [0002] In recent years, with the continuous deepening of scientists' research on nanomaterials, a new carbon nanomaterial has gradually entered people's field of vision and has a wide range of applications in many fields. Carbon nanodots, also known as carbon quantum dots or carbon dots, are generally spherical carbon nanoparticles with a size below 10nm. In 2004, Scrivens et al. discovered for the first time a substance that fluoresces under the irradiation of an ultraviolet lamp when purifying the soot produced by the single-walled carbon nanotubes prepared by the arc discharge method. Since then, carbon nanodots have received increasing attention. [0003] As a new generation of green nanomaterials, carbon dots have many unique properties. F...

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): G01N21/64B82Y30/00
CPCB82Y30/00G01N21/643G01N2021/6432
Inventor 储富祥周希高学霞王春鹏
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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