A near-full-spectrum fluorescent nano-carbon dot and its preparation method

A fluorescent nanometer and full-spectrum technology, which is applied in the field of carbon nanoluminescent materials, can solve the problems of no synthetic fluorescent carbon dots, etc., and achieve the effect of short synthetic carbon dot cycle, low synthesis cost and simple equipment

Active Publication Date: 2018-01-16
WUYI UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the currently known carbon dot synthesis field, it is impossible to use one raw material to change the ratio to synthesize carbon dots with multiple fluorescent emissions, let alone synthesize fluorescent carbon dots with yellow and orange emission peaks.

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
  • A near-full-spectrum fluorescent nano-carbon dot and its preparation method
  • A near-full-spectrum fluorescent nano-carbon dot and its preparation method
  • A near-full-spectrum fluorescent nano-carbon dot and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take monoethanolamine and citric acid at a molar ratio of 1:0.05, add deionized water to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, Let the hydrothermal kettle cool down to room temperature naturally, and the blue solution can be obtained, which is the carbon dot aqueous solution. After the carbon dot aqueous solution is subjected to high-speed centrifugation at 16,000 rpm to remove impurities, it is then placed in a vacuum drying oven to remove carbon by vacuum drying. Point most of the water in the aqueous solution, and the final solution is the carbon dot solution. Take the excitation wavelength of 395nm as an example to test the spectrum.

Embodiment 2

[0033] Take monoethanolamine and citric acid at a molar ratio of 1:0.20, add deionization to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, make The hydrothermal kettle is naturally cooled to room temperature, and the green solution can be obtained, which is the carbon dot aqueous solution. After the carbon dot aqueous solution is removed by high-speed centrifugation at 16,000 rpm, it is then placed in a vacuum drying oven to remove the carbon dot aqueous solution by vacuum drying. Most of the water in the solution, the final solution is the carbon dot solution. Take the excitation wavelength of 395nm as an example to test the spectrum.

Embodiment 3

[0035] Take monoethanolamine and citric acid at a molar ratio of 1:0.18 or 1:0.23, add deionized water to dissolve, stir evenly, transfer to a hydrothermal kettle, and conduct a hydrothermal reaction at 160°C-250°C for 5h-24h. After the reaction is completed, let the hydrothermal kettle cool down to room temperature naturally, and the green solution can be obtained, which is the carbon dot aqueous solution. Drying removes most of the water in the carbon dot aqueous solution, and the final solution is the carbon dot solution. Taking the excitation wavelength of 395nm as an example, the spectrum is tested.

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 diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a near-full-spectrum fluorescent carbon point and a preparation method thereof, belonging to the field of carbon nano-luminescent materials. The emission peak wavelength of the carbon dot synthesized by this method is between 470nm-700nm, and the fluorescence emission peak of the carbon dot hardly changes with the change of the excitation wavelength, and has the characteristics of high fluorescence intensity and stable quantum yield. The synthesis preparation method comprises: organic acid containing carboxyl group and organic amine, the molar ratio of organic amine and organic acid is 1:0-1:1, adding a certain amount of deionized water, stirring evenly and transferring to a hydrothermal kettle , carry out a hydrothermal reaction, and after the reaction, the hydrothermal kettle is naturally cooled to room temperature to obtain an aqueous solution of carbon dots. The carbon dots synthesized by the invention have cheap and easy-to-obtain raw materials and are almost non-toxic, and the synthesis cycle of the carbon dots is short and the equipment for synthesizing the carbon dots is simple.

Description

technical field [0001] The invention belongs to the technical field of carbon nano-luminescent materials, and in particular relates to a near-full-spectrum fluorescent nano-carbon point and a preparation method thereof. Background technique [0002] In 2004, Scrivens et al. reported in the American Chemical Society (JACS) that when purifying single-walled carbon nanotubes prepared by the arc discharge method, carbon quantum dots (ie, carbon dots) were accidentally isolated. Once this research result was reported, it attracted widespread attention. This carbon nanomaterial overcomes many shortcomings of traditional semiconductor quantum dots. It not only has excellent optical properties, but also has good biocompatibility and is easy to realize functionalization. It has good application prospects in the fields of biosensing, analysis and detection, photocatalytic technology, drug delivery, optoelectronic devices, and optical lighting. [0003] Carbon dots refer to spherical ...

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 Patents(China)
IPC IPC(8): C09K11/65C01B32/15B82Y30/00
CPCC01P2004/64C09K11/65
Inventor 陈叶青王超陈世旺曾庆光罗坚义
Owner WUYI 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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap