Method for preparing silicon dioxide hybridized quantum dot by using one-pot method

A technology of silicon dioxide and quantum dots, which is applied in the field of nanotechnology preparation, can solve the problems of difficult wide application of quantum dots, unstable luminescence, and difficult preparation, and achieve good application prospects, excellent luminescent performance, and low toxicity.

Active Publication Date: 2010-06-16
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesized quantum dots still have some serious disadvantages, such as unstable luminescence, d

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 preparing silicon dioxide hybridized quantum dot by using one-pot method
  • Method for preparing silicon dioxide hybridized quantum dot by using one-pot method
  • Method for preparing silicon dioxide hybridized quantum dot by using one-pot method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1:

[0016] Using cadmium acetate as the metal source for the preparation of quantum dots, mercaptopropionic acid stabilizer, sodium selenohydride as the non-metal source for the preparation of quantum dots, and ethyl orthosilicate as the silica source to prepare silica hybrid CdSe quantum dots .

[0017] Step (a): Add 1.33 grams of cadmium acetate and 2.55 grams of mercaptopropionic acid to 1.5 liters of deionized water in a 2 liter reaction flask, and adjust the pH of the solution to 8.0 with sodium hydroxide to prepare a cadmium ion precursor solution.

[0018] Step (b): While blowing nitrogen into the reaction flask, the temperature of the solution is increased to 100°C, and then 4 ml of an aqueous solution containing 0.41 g of sodium selenium hydride is added to prepare a precursor liquid of CdSe quantum dots.

[0019] Step (c): Inject 20.8 grams of tetraethyl orthosilicate into the precursor solution of CdSe quantum dots, and react at 100° C. for 48 hours to prepa...

Example Embodiment

[0020] Example 2:

[0021] Using cadmium acetate as the metal source for the preparation of quantum dots, mercaptopropionic acid stabilizer, potassium selenohydride as the non-metal source for the preparation of quantum dots, and ethyl orthosilicate as the silica source to prepare silica hybrid CdSe quantum dots .

[0022] Step (a): Add 0.27 g of cadmium acetate and 0.65 g of mercaptopropionic acid to 1.5 liters of deionized water in a 2 liter reaction flask, and adjust the pH of the solution to 10.0 with sodium hydroxide to prepare a cadmium ion precursor solution.

[0023] Step (b): While blowing nitrogen into the reaction flask, the temperature of the solution was increased to 90°C, and then 4 ml of an aqueous solution containing 0.1 g of potassium selenium hydride was added to prepare a precursor liquid of CdSe quantum dots.

[0024] Step (c): Inject 20.8 grams of ethyl orthosilicate into the precursor liquid of the CdSe quantum dots, and react at 90° C. for 72 hours to prepare th...

Example Embodiment

[0025] Example 3:

[0026] Cadmium acetate is used as a metal source for preparing quantum dots, thioglycolic acid stabilizer, sodium selenohydride is used as a non-metal source for preparing quantum dots, and ethyl orthosilicate is used as a silica source to prepare silica hybrid CdSe quantum dots.

[0027] Step (a): Add 4.1 grams of cadmium acetate and 4.4 grams of thioglycolic acid to 1.5 liters of deionized water in a 2 liter reaction flask, and adjust the pH of the solution to 7.5 with sodium hydroxide to prepare a cadmium ion precursor solution.

[0028] Step (b): While blowing nitrogen into the reaction flask, the temperature of the solution is increased to 100°C, and then 4 ml of an aqueous solution containing 0.96 g of sodium selenium hydride is added to prepare a precursor liquid of CdSe quantum dots.

[0029] Step (c): Injecting 150 grams of tetraethyl orthosilicate into the precursor liquid of the CdSe quantum dots, and reacting at 100° C. for 24 hours to prepare silicon di...

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
Average sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing silicon dioxide hybridized quantum dot by using a one-pot method. The invention comprises the following steps of: adding a non-metal ion source needed for preparing quantum dots to a quantum dot metal ion source containing mercapto stabilizer in a water phase system, getting the precursor liquid of quantum dot under the protection of a nitrogen atmosphere, then adding the silicon dioxide to the precursor liquid of quantum dot and reacting the silicon dioxide with the precursor liquid of quantum dot to obtain the silicon dioxide hybridized quantumdot. The silicon dioxide hybridized quantum dot obtained in the invention has the advantages of good dissolubility, excellent luminous performance and optical stability, good biocompatibility and biological stability, and good prospect of application in the aspects of biomarker and function materials.

Description

technical field [0001] The invention relates to a preparation method in the field of nanotechnology, in particular to a one-pot method for preparing silicon dioxide hybrid quantum dots, Background technique [0002] The fluorescence wavelength or luminous color of quantum dots can be easily adjusted by the particle size. The quantum efficiency of luminescence is high, and it has a narrow and symmetrical emission spectrum and a wide and continuous absorption spectrum. These characteristics make quantum dots widely used in biomarkers, light-emitting devices, Composite materials, solar cells and other fields show broad application prospects. However, the synthesized quantum dots still have some serious disadvantages, such as unstable luminescence, difficulty in mass production, high toxicity, etc., which make it difficult for quantum dots to be widely used. In order to solve these shortcomings, a layer of silicon dioxide can be coated on the surface of quantum dots. Silica ha...

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): B82B3/00
Inventor 高超周立
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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