Carbon quantum dot with silkworm excrement as raw material as well as preparation method and application of carbon quantum dot

A technology of carbon quantum dots and silkworm excrement, applied in chemical instruments and methods, analytical materials, luminescent materials, etc., can solve the problems of large size, long time, complicated purification process of fluorescent carbon dots, etc., achieve high yield and improve carbonization efficiency effect

Active Publication Date: 2019-03-08
广东省计量科学研究院(华南国家计量测试中心)
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The Chinese patent No. 201710755244.4 discloses a method for preparing fluorescent carbon dots using silkworm excrement as a raw material, which is to conduct high-temperature direct carbonization or hydrothermal carbonization on the cleaned silkworm excrement at a certain temperature and for a certain period of time, and then purify To obtain fluorescent carbon dot powder, this method takes a long time, and the purification process of the obtained fluorescent carbon dots is relative...

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 with silkworm excrement as raw material as well as preparation method and application of carbon quantum dot
  • Carbon quantum dot with silkworm excrement as raw material as well as preparation method and application of carbon quantum dot
  • Carbon quantum dot with silkworm excrement as raw material as well as preparation method and application of carbon quantum dot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation method of the carbon quantum dot powder based on silkworm excrement, it may further comprise the steps:

[0061] (1) After mixing 0.5g of silkworm excrement obtained by normal feeding of mulberry leaves with 5mL of concentrated sulfuric acid (the mass fraction of sulfuric acid in concentrated sulfuric acid is 98%), put it in a 25mL microwave reactor, add a magnet to stir or rotate the microwave The reactor is equipped with a turntable, microwave reaction under 500W power, and a dark yellow carbon quantum dot solution is obtained in 3 minutes;

[0062] (2) Filter to remove insoluble impurities, place the obtained reaction solution in a dialysis bag (1,000-10,000Da) for dialysis, and replace the deionized water for dialysis every 30 minutes, a total of 5 times, to obtain the CDs aqueous solution;

[0063] (3) Freeze-dry for 24 hours at -10°C to -50°C.

Embodiment 2

[0065] The preparation method of the carbon quantum dot powder based on silkworm excrement, it may further comprise the steps:

[0066] (1) After mixing 0.2g of silkworm excrement obtained by normal feeding of mulberry leaves with 5mL of concentrated nitric acid (the mass fraction of nitric acid in concentrated nitric acid is 68%), put it in a 25mL microwave reactor, add a magnet to stir or rotate the microwave The reactor is equipped with a turntable, microwave reaction under 100W power, and a dark yellow carbon quantum dot solution is obtained in 5 minutes;

[0067] (2) Filter to remove insoluble impurities, place the obtained reaction solution in a dialysis bag (1,000-10,000Da) for dialysis, and replace the deionized water for dialysis every 20 minutes, a total of 6 times, to obtain the CDs aqueous solution;

[0068] (3) Freeze-dry for 24 hours at -10°C to -50°C.

Embodiment 3

[0070] The preparation method of the carbon quantum dot powder based on silkworm excrement, it may further comprise the steps:

[0071] (1) After mixing 0.3 g of silkworm excrement obtained by normal feeding of mulberry leaves with 5 g of phosphorus pentoxide aqueous solution (now prepared and used, the mass fraction of phosphorus pentoxide is 60%), place in a 25mL microwave reaction kettle, Add magnets to stir or rotate the supporting turntable of the microwave reactor, microwave reaction at 700W power, and obtain a dark yellow carbon quantum dot solution in 10 minutes;

[0072] (2) Filter to remove insoluble impurities, place the obtained reaction solution in a dialysis bag (1,000-10,000Da) for dialysis, and replace the deionized water for dialysis every 25 minutes, a total of 7 times, to obtain the CDs aqueous solution;

[0073](3) Freeze-dry for 24 hours at -10°C to -50°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

No PUM Login to view more

Abstract

The invention discloses a carbon quantum dot which is prepared by taking silkworm excrement as a carbon source. The doping atom percentages of N and O are respectively 0.01 to 30 percent and 0.05 to 5percent and the particle size is 3 to 4 nm. A preparation method of the carbon quantum dot comprises the following steps: firstly, mixing the silkworm excrement with a carbonizer and carrying out microwave reaction (100 to 1000W, 2 to 60 minutes) to obtain a reaction solution; secondly, dialyzing the reaction solution in which insoluble impurities are removed and carrying out freeze drying, thusobtaining a finished product. The mass-volume ratio of the silkworm excrement to the carbonizer is (1 g to 1 mL) to (1 g to 30 mL) in the first step; in addition, the microwave reaction needs to be carried out in a state of stirring or rotating. The carbon quantum dot disclosed by the invention has the advantages of nitrogen modification, good water solubility and good light stability; besides, the carbon quantum dot can be stored at room temperature for one year or above, and can be used as a fluorescent probe which has significant response characteristics to the change of excitation wavelength, pH, metal ion concentration, temperature and solvent polarity; the carbon quantum dot provides a broad application prospect for the field of biological detection and imaging in the future.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterials, more specifically, to a carbon quantum dot using silkworm excrement as a raw material, its preparation method and application. Background technique [0002] Compared with the well-known and commercialized quantum dots, carbon quantum dots (Carbon dots, referred to as CDs) have similar characteristics, such as high luminous brightness, adjustable size, adjustable fluorescence emission wavelength, photobleaching resistance, etc. In addition, CDs do not contain toxic elements, and their use does not bring inherent toxic burdens to ecosystems or organisms, making them ideal materials for in vivo bioanalysis. [0003] So far, CDs have attracted great attention and shown great application potential in energy conversion and storage, bioimaging, sensors, bioprobes, and various other fields. Since Sun and co-workers first prepared CDs by laser ablation in 2006, many studies have focused on t...

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
IPC IPC(8): C09K11/65C09K11/02B82Y20/00B82Y40/00G01N21/64
CPCG01N21/643C09K11/025C09K11/65B82Y20/00B82Y40/00G01N2021/6432
Inventor 黄彦捷周瑾艳陈玲黄梓宸黄振宇
Owner 广东省计量科学研究院(华南国家计量测试中心)
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