Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of multifunctional fluorescent carbon quantum dot and its preparation method and application

A carbon quantum dot and multifunctional technology, which is applied in the field of multifunctional fluorescent carbon quantum dots and its preparation, can solve the problems of expensive reaction raw materials and high reaction temperature, and achieves the advantages of solving process and raw material limitations, simple preparation method and short reaction time. Effect

Active Publication Date: 2020-11-10
SHANXI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhang Xiaoling et al. used adenosine triphosphate at 300°C for 2 hours to synthesize nitrogen and phosphorus co-doped carbon dots. The reaction materials were expensive and the reaction temperature was high. (Gong Y, Yu B, Yang W, et al.Phosphorus, and nitrogen co-doped carbon dots as a fluorescent probe for real-time measurement of reactive oxygen and nitrogen species inside macrophages[J].Biosensors&Bioelectronics,2016,79:822.)

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 kind of multifunctional fluorescent carbon quantum dot and its preparation method and application
  • A kind of multifunctional fluorescent carbon quantum dot and its preparation method and application
  • A kind of multifunctional fluorescent carbon quantum dot and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, weigh 0.4g of phthalic acid and place it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain light yellow solid flakes, and ultrasonically obtain a clear solution;

[0031] Step 2, after the glass container is naturally cooled, add 30mL of secondary water into it, ultrasonically dissolve to obtain a light yellow solution, filter to obtain a clear solution, and the solution obtained after 1 day of dialysis with a 1000Da dialysis bag is double-doped multifunctional fluorescent carbon quantum dots solution.

[0032] In step 3, the above carbon quantum dot aqueous solution is freeze-dried to obtain the target double-doped carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 15%.

[0033] Characterization and application see Figure 1-8 , Table 1-2.

Embodiment 2

[0035] Step 1, weigh 0.4g of tartaric acid and place it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain light yellow solid flakes. Ultrasound to obtain a clear solution;

[0036] Step 2, after the glass container is naturally cooled, add 30mL of secondary water into it, ultrasonically dissolve to obtain a light yellow solution, filter to obtain a clear solution, and the solution obtained after 1 day of dialysis with a 1000Da dialysis bag is double-doped multifunctional fluorescent carbon quantum dots solution.

[0037] In step 3, the above carbon quantum dot aqueous solution is freeze-dried to obtain the target double-doped carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 9%.

Embodiment 3

[0039] Step 1, weigh 0.4g of citric acid and place it in a glass container, add 6mL of ethylenediamine, stir well, then gradually add 4mL of concentrated phosphoric acid to obtain light yellow solid flakes. Ultrasound to obtain a clear solution;

[0040]Step 2, after the glass container is naturally cooled, add 30mL of secondary water into it, ultrasonically dissolve to obtain a light yellow solution, filter to obtain a clear solution, and the solution obtained after 1 day of dialysis with a 1000Da dialysis bag is double-doped multifunctional fluorescent carbon quantum dots solution.

[0041] In step 3, the above carbon quantum dot aqueous solution is freeze-dried to obtain the target double-doped carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 12%.

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides multi-functional fluorescence carbon quantum dots and a preparation method and application thereof. The preparation method of the carbon quantum dots comprises the following steps: by taking phthalic acid as a raw material, adding ethanediamine and strong phosphoric acid to obtain a pale yellow solid slice, after reaction is stopped, naturally cooling to room temperature, adding ultrapure water, stirring to obtain a pale yellow solution, filtering with a filter membrane, and freeze-drying to obtain nitrogen phosphorus codoped fluorescence carbon quantum dot powder. The preparation process of the carbon quantum dots is simple, the raw material is wide in source and low-cost, and the preparation method is simple and fast; the prepared carbon quantum dots are stable inoptical property and good in biocompatibility, not only can be used for detecting manganese ions in traditional Chinese medicines and tea leaves, but also can serve as a temperature sensor, and meanwhile can be used for cell imaging.

Description

[0001] technology neighborhood [0002] The invention relates to a luminescent nanometer material, in particular to a carbon quantum dot, in particular to a double-doped multifunctional fluorescent carbon quantum dot and its preparation method and application. Background technique [0003] Carbon nanomaterials are a research hotspot in the field of nanoscience and technology. The zero-dimensional carbon nanomaterial fullerene was reported in 1985; one-dimensional carbon nanotubes were discovered in 1991; and graphene with a two-dimensional structure was prepared in 2004. At the same time, in 2004, Xu et al. observed for the first time luminescent carbon nanoparticles, also known as carbon quantum dots, during the preparation of single-walled carbon nanotubes by purifying arc discharge. In 2006, Sun Yaping of Clemson University synthesized carbon quantum dots for the first time by laser etching. In 2007, carbon quantum dots with a size of less than 2nm and different luminesce...

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): C09K11/65G01D21/02
CPCC09K11/70G01D21/02
Inventor 杜芳芳郭忠慧李甘弓晓娟董川双少敏
Owner SHANXI UNIV