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

Method for synthesizing carbon quantum dots from water chestnuts and application of carbon quantum dots

A technology of carbon quantum dots and water chestnuts, which is applied in the field of microwave synthesis of carbon quantum dots, can solve the problems of time-consuming, unfavorable application, and low quantum yield of carbon dots, and achieve the effects of simple operation, good solubility and dispersibility, and easy promotion

Active Publication Date: 2017-05-10
JIANGNAN UNIV
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most methods focus on hydrothermal treatment. Although the raw materials in these methods are cheap and easy to obtain, they take a long time and the quantum yield of carbon dots is low, which is not conducive to subsequent applications.

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
  • Method for synthesizing carbon quantum dots from water chestnuts and application of carbon quantum dots
  • Method for synthesizing carbon quantum dots from water chestnuts and application of carbon quantum dots
  • Method for synthesizing carbon quantum dots from water chestnuts and application of carbon quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Crush the water chestnuts with a blender, and uniformly mix the crushed water chestnuts and ultrapure water at a mass ratio of 1:10 to prepare a precursor solution for later use.

[0023] (2) The obtained precursor solution was irradiated and heated at a microwave power of 600w for 3min.

[0024] (3) Take out and cool to room temperature naturally, add deionized water 2.0-3.0 times the volume of the precursor solution, centrifuge to remove insoluble matter, and the supernatant is dialyzed through a 1000Da dialysis bag, and freeze-dried at -50°C to obtain carbon quantum dot powder. The quantum yield was 19.3%.

Embodiment 2

[0026] (1) Crush the water chestnuts with a blender, and uniformly mix the crushed water chestnuts and ultrapure water at a mass ratio of 1:10 to prepare a precursor solution for later use.

[0027] (2) The obtained precursor solution was irradiated and heated at a microwave power of 700w for 3min.

[0028] (3) Take out and cool to room temperature naturally, add deionized water with 2.0-3.0 times the volume of the precursor solution, centrifuge to remove insoluble matter, the supernatant is dialyzed through a 1000Da dialysis bag, and freeze-dried at -50°C to obtain carbon quantum dot powder , with a quantum yield of 21.2%.

Embodiment 3

[0030] (1) Crush the water chestnuts with a blender, and uniformly mix the crushed water chestnuts and ultrapure water at a mass ratio of 1:10 to prepare a precursor solution for later use.

[0031] (2) The obtained precursor solution was radiated and heated for 5 min under a microwave power of 800 W.

[0032] (3) Take out and cool to room temperature naturally, add deionized water with 2.0-3.0 times the volume of the precursor solution, centrifuge to remove insoluble matter, the supernatant is dialyzed through a 1000Da dialysis bag, and freeze-dried at -50°C to obtain carbon quantum dot powder , with a quantum yield of 29.4%.

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
Login to View More

Abstract

The invention discloses a method for synthesizing carbon quantum dots from water chestnuts and application of the carbon quantum dots and belongs to the technical field of nanometer materials. The method includes mixing ground water chestnuts with deionized water, reacting for a period of time in a microwave oven, taking a reaction product out of the microwave oven, naturally cooling to a room temperature, adding deionized water into the cooled reaction product, removing insoluble substances by centrifugation, and subjecting liquid supernatant to dialysis and freeze drying so as to obtain carbon quantum dot powder. The method has the advantages that large-scale preparation can be achieved because of widely available raw materials, a preparation process is simple and rapid, the prepared carbon quantum dots are high in stability and fluorescence quantum yield and excellent in water solubility and can be used for analyzing heavy metal ions in a water body.

Description

technical field [0001] The invention relates to a method for synthesizing carbon quantum dots by using water chestnuts as a raw material by microwave and an application thereof, belonging to the technical field of nanometer materials. Background technique [0002] As a novel carbon nanomaterial, carbon quantum dots have the advantages of good water solubility, high luminous intensity, low biotoxicity, good biocompatibility, high chemical stability, and easy surface modification, so it is expected to replace traditional semiconductors. Quantum dots and toxic organic dyes. The green synthesis of carbon quantum dots from biological raw materials is in line with the requirements of chemical development and the concept of atom economy, and is a current research hotspot. [0003] The synthesis methods of carbon dots mainly include electrochemical preparation method, strong acid oxidation method, laser-assisted preparation method, arc discharge method, and ultrasonic method. Diff...

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): C01B32/15C09K11/65G01N21/64
CPCC01P2002/84C01P2004/04C01P2004/64C01P2006/60C09K11/65G01N21/6402
Inventor 顾丹商少明刘浩
Owner JIANGNAN UNIV
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