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

Carbon quantum dot as well as preparation method and application thereof

A technology of carbon quantum dots and dihydric phenols, applied in the field of carbon quantum dots and its preparation, can solve the problems of being located in the blue light region, short emission wavelength, and undeveloped uses

Pending Publication Date: 2022-08-05
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the carbon quantum dots synthesized with phenolic compounds as raw materials in the prior art with relatively short emission wavelengths, most of which are located in the blue light region, and have not yet developed their use in detecting pH defects, thereby providing a carbon quantum dot and its preparation method and application, the carbon quantum dot has a long emission wavelength and is located in the yellow and red fluorescent regions, and the carbon quantum dot has pH sensitivity and can be used to detect pH

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
  • Carbon quantum dot as well as preparation method and application thereof
  • Carbon quantum dot as well as preparation method and application thereof
  • Carbon quantum dot as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The preparation method of carbon quantum dots

[0034] The present embodiment provides a preparation method of carbon quantum dots, comprising the following steps:

[0035] 1. Weigh 2g of diphenol on an analytical balance, dissolve it in a beaker containing 100mL of ethanol-acetonitrile mixed solvent (acetonitrile content: 30% by volume), and stir until dissolved;

[0036] 2. Add 1 mL of concentrated sulfuric acid (98% by mass) as a catalyst to the sample obtained in step 1, and stir to mix evenly;

[0037] 3. Transfer the sample obtained in step 2 to the autoclave, place the autoclave in an oven at a temperature of 180°C, react for 8 hours, cool the autoclave to room temperature (25°C), and remove the solvent from the reaction solution under reduced pressure. Then, it is purified by silica gel column chromatography, and a mixture of ethyl acetate and methanol is used as the eluent, and the volume ratio of ethyl acetate and methanol is 1:5 to obtain dark b...

Embodiment 2

[0042] The present embodiment provides a preparation method of carbon quantum dots, comprising the following steps:

[0043] 1. Weigh 5g of hydroquinone on an analytical balance, dissolve it in a beaker containing 100mL of ethanol solvent, and stir until dissolved;

[0044] 2. Add 0.6 mL of strong acid (methanesulfonic acid: analytical grade) to the sample obtained in step 1 as a catalyst, and stir to mix evenly;

[0045] 3. Transfer the sample obtained in step 2 to the autoclave, place the autoclave in an oven at a temperature of 200°C, react for 4 hours, cool the autoclave to room temperature (40°C), remove the solvent from the reaction solution under reduced pressure, and then Purified by silica gel column chromatography, using a mixture of ethyl acetate and methanol as eluent, and the volume ratio of ethyl acetate and methanol is 1:1, to obtain carbon quantum dots.

Embodiment 3

[0047] The present embodiment provides a preparation method of carbon quantum dots, comprising the following steps:

[0048] 1. Weigh 1 g of diphenol on an analytical balance, dissolve it in a beaker containing 20 mL of ethanol-acetonitrile mixed solvent (acetonitrile content: 80% by volume), and stir until dissolved;

[0049]2. Add 0.3 mL of acid (mixed with concentrated hydrochloric acid (37% by mass) and concentrated nitric acid (68% by mass) according to a volume ratio of 3:1) as a catalyst to the sample obtained in step 1, and stir to mix evenly;

[0050] 3. Transfer the sample obtained in step 2 to the autoclave, place the autoclave in an oven at a temperature of 100°C, react for 10 hours, cool the autoclave to room temperature (20°C), remove the solvent under reduced pressure from the reaction solution, and then Purified by silica gel column chromatography, using a mixture of ethyl acetate and methanol as eluent, and the volume ratio of ethyl acetate and methanol is 1:1...

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 provides a preparation method of carbon quantum dots, which comprises the following steps: dissolving a dihydric phenol substance in a polar organic solvent, and then adding strong acid to obtain a mixed solution; carrying out solvothermal reaction on the mixed solution, wherein the reaction condition is that the reaction is carried out for 4-10 hours at the temperature of 100-200 DEG C under a closed condition; according to the method, the dihydric phenol substance is taken as the raw material, the strong acid is taken as the catalyst, and then the solvothermal reaction is carried out, so that the emission wavelength of the generated carbon quantum dots is increased, the carbon quantum dots can be located in yellow and red fluorescent regions, and in addition, the carbon quantum dots synthesized by the method have pH sensitivity and can be used for detecting the pH value.

Description

technical field [0001] The invention relates to the field of carbon quantum dot synthesis, in particular to a carbon quantum dot and a preparation method and application thereof. Background technique [0002] Phenolic compounds have very important uses in chemical industry. They can be used as synthetic raw materials for synthetic fibers, engineering plastics, pesticides, medicines, explosives, plasticizers, preservatives and dye intermediates. The recovery of dihydric phenols in effluent is of great significance for realizing zero discharge of wastewater. Develop a high-efficiency extraction and removal of dihydric phenol system, so that the content of dihydric phenol in industrial wastewater is far lower than the environmental protection standard. At the same time, in order to meet the optimization of industrial structure and environmental protection requirements, and realize the concept of turning waste into treasure The secondary utilization of dihydric phenol has attra...

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): C01B32/15C09K11/65B82Y15/00B82Y20/00B82Y40/00G01N21/64
CPCC01B32/15C09K11/65B82Y15/00B82Y20/00B82Y40/00G01N21/6428
Inventor 刘宁孙江江刘伟郝祥利高婷朱泽波
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND