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

A kind of water-soluble graphene-like quantum dots and its preparation method and application

A graphene quantum dot, water-soluble technology, used in chemical instruments and methods, measuring devices, nanotechnology for materials and surface science, etc., can solve problems such as no occurrence, and achieve good dispersibility and biocompatibility Good, low-cost effects

Inactive Publication Date: 2020-09-25
TIANJIN NORMAL UNIVERSITY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are basically no reports on the direct hydrothermal sintering of macromolecular polymers containing C and N elements into new graphene-like quantum dots.

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 water-soluble graphene-like quantum dots and its preparation method and application
  • A kind of water-soluble graphene-like quantum dots and its preparation method and application
  • A kind of water-soluble graphene-like quantum dots and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of water-soluble novel graphene-like quantum dots is divided into the following steps:

[0035] A. Accurately weigh 0.0008 g of polyethyleneimine (PEI) at room temperature;

[0036] B. Dissolve them in 12 mL of water respectively, and stir thoroughly to dissolve completely;

[0037] C. Pass the above solution with nitrogen for 15 minutes, remove the dissolved oxygen and transfer it to the reaction kettle;

[0038] D. Heating at 180°C for 12 hours, the water-soluble graphene-like quantum dot solution can be obtained, and after post-treatment, water-soluble graphene-like quantum dots with a particle size of 4-5 nm are obtained; the water-soluble new The fluorescence emission wavelength of graphene-like quantum dots is in the ultraviolet region.

[0039] The post-treatment described in the embodiment refers to adding an organic solvent such as tetrahydrofuran to the synthesized quantum dot solution. Due to the difference in solubility, the quantum dots wi...

Embodiment 2

[0041] The preparation of water-soluble novel graphene-like quantum dots is divided into the following steps:

[0042] A. Accurately weigh 0.5640 g of polyethyleneimine (PEI) at room temperature;

[0043] B. Dissolve them in 12 mL of water respectively, and stir thoroughly to dissolve completely;

[0044] C. Pass the above solution with nitrogen for 15 minutes, remove the dissolved oxygen and transfer it to the reaction kettle;

[0045] D. Heat at 180°C for 12 hours to obtain a water-soluble graphene-like quantum dot solution. After post-treatment, water-soluble graphene-like quantum dots with a particle size of 4-5 nm are obtained; the fluorescence emission wavelength of the water-soluble new graphene-like quantum dots obtained at this time is in the visible blue light region, but it can be known from the experimental phenomenon that the PEI was in large excess and did not fully react.

Embodiment 3

[0047] The preparation of water-soluble novel graphene-like quantum dots is divided into the following steps:

[0048] A. Accurately weigh 0.2828 g of polyethyleneimine (PEI) at room temperature;

[0049] B. Dissolve them in 0 mL water respectively, stir well to make it completely dissolved;

[0050] C. Pass the above solution with nitrogen for 15 minutes, remove the dissolved oxygen and transfer it to the reaction kettle;

[0051] D. Heat at 180°C for 12 hours to obtain a water-soluble graphene-like quantum dot solution. After post-treatment, water-soluble graphene-like quantum dots with a particle size of 4-5 nm are obtained; the fluorescence intensity of the water-soluble new graphene-like quantum dots obtained at this time is low.

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 relates to a water-soluble graphene-like quantum dot and a preparation method and an application thereof. The method employs non-toxic macro-molecule polymers such as polyethyleneimine,and the graphene-like nanoparticles with a particle size being about 4 nm, excellent fluorescence and emission wavelength gradually moving from an ultraviolet light zone to a blue light zone can be prepared under hydrothermal condition. Compared with other synthesis methods of the quantum dot by an organic phase, the method has the advantages of low raw material price, safety and low toxicity, simple operation, good reappearance, and low requirements on operation staff and apparatus equipment. Compared with the quantum dot obtained by other hydrothermal method synthesis methods, the water-soluble performance of the quantum dot is good, a metallic element is not contained, the method is benefit for biological analysis and environment water quality detection, the biological compatibility isgood, and the method is used for fields of gene analysis and biological imaging.

Description

[0001] This patent is funded by the National Natural Science Foundation of China General Project 2137509, Tianjin Natural Science Foundation Youth Project (No.17JCQNJC05800) and Tianjin Normal University Doctoral Fund Project (No.52XB1510). technical field [0002] The invention belongs to the technical field of quantum dot preparation, and in particular relates to a method for preparing graphene-like quantum dots under hydrothermal conditions. Background technique [0003] Quantum dots are semiconductor nanomaterials that bind conduction band electrons, valence band holes, and excitons in three-dimensional directions. Quantum dots have a separate quantized energy spectrum, and their physical behavior (such as optical and electrical properties) is similar to atoms, with a discrete energy level structure, so quantum dots are also called "artificial atoms". Due to the influence of quantum confinement, surface effect and size effect, quantum dots, as a new type of fluorescent n...

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): C09K11/65C09K11/02B82Y20/00B82Y30/00G01N21/64
CPCB82Y20/00B82Y30/00C09K11/025C09K11/65G01N21/6428G01N21/643G01N21/6486G01N2021/6432
Inventor 李妍王璐熊艳程月张菲张一菡王文洋
Owner TIANJIN NORMAL UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com