Quantum dot/TiO2 nano-composite hydrogel soft reactor and in-situ radiation preparation method thereof

A nano-composite, soft reactor technology, applied in chemical instruments and methods, botanical equipment and methods, applications, etc., can solve the problems that restrict the application of hydrogel multifunctional materials, chemical cross-linking is difficult to control the degree of cross-linking, affects water Gel catalytic stability and other issues, to achieve the effects of excellent mechanical strength, enhanced photocatalytic performance, fast expansion and contraction response

Active Publication Date: 2016-12-14
HUBEI UNIV OF SCI & TECH
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogel prepared by this method is not only easy to release the residual highly toxic cross-linking agent and reducing agent in the water body, but also has uneven cross-linking, local "burning phenomenon", and it is difficult to control the degree of cross-linking by chemical cross-linking. Secondly, the quantum dots prepared by the

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: 0.033g of nano-TiO will be taken 2 , 0.333g of calcium carbonate and 0.033g of triethanolamine were added to 26mL of deionized water respectively, and the ultrasonic stirring time was 0.5h to make it uniformly form a stable emulsion dispersion system. Put 0.167g of polyvinyl alcohol (degree of polymerization 1670) into 6.5mL deionized water at 95°C, the stirring rate is 150r / min, the heating and stirring time is 2h, after it is completely dissolved, it is cooled to 50°C, and 0.667g of carboxymethyl shell is added. Polysaccharide, stirred for 1 hour to completely dissolve to form a homogeneous solution, added to the above emulsion system under stirring, continued ultrasonic mechanical stirring for 0.5 hours, and passed N 2 0.5h, then let stand for 2h under negative pressure to remove bubbles, and inject into 15×5×1mm 3 In the PE mold of the 2 About 0.5h, then stand under negative pressure for defoaming, rapid vacuum freeze-drying and molding, take out the p...

Embodiment 2

[0043] Example 2: 0.333g of nano-TiO will be taken 2 , 0.667g of sodium chloride and 0.067g of disodium hydrogen phosphate were added to 24.5mL of deionized water respectively, and the ultrasonic stirring time was 0.5h to make it uniformly form a stable emulsion dispersion system. Put 0.334g collagen into 5.5mL deionized water at 45°C, stir at a rate of 150r / min, heat and stir for 2h, after complete dissolution, add 1.334g of hydroxypropyl chitosan, stir for 1h, and make it completely dissolved to form After the solution is homogeneous, it is added to the above emulsion system under stirring, and after continuous ultrasonic mechanical stirring for 0.5h, N 2 0.5h, then let stand for 2h under negative pressure to remove bubbles, and inject into 15×5×1mm 3 After 3 cycles of freezing-thawing process, 0.0067g cadmium telluride quantum dot precursor solution and 0.667g o-hydroxybenzoic acid were slowly added into it, and N 2 About 0.5h, then stand under negative pressure for defo...

Embodiment 3

[0045] Example 3: 0.667g of nano-TiO will be taken 2 , 1.334g of aluminum oxide and 0.165g of acetic acid were added to 23.5mL of deionized water respectively, and the ultrasonic stirring time was 0.5h to make it uniformly form a stable emulsion dispersion system. Put 0.667g of N-isopropylacrylamide into 4mL of deionized water at 60°C, the stirring rate is 150r / min, the heating and stirring time is 2h, after it is completely dissolved, add 1.901g of carboxymethyl cellulose, and stir for 1h to make it completely After dissolving to form a homogeneous solution, it was added to the above emulsion system under stirring, and after ultrasonic mechanical stirring was continued for 0.5h, N 2 0.5h, then let stand for 2h under negative pressure to remove bubbles, and inject into 15×5×1mm 3 In the PE mold of the 2 About 0.5h, then stand under negative pressure for defoaming, rapid vacuum freeze-drying and molding, take out the product and vacuum-pack it in a PE film bag and place it a...

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
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a quantum dot/TiO2 nano-composite hydrogel soft reactor and an in-situ radiation preparation method thereof. According to the in-situ radiation preparation method, physically crosslinked TiO2 composite hydrogel utilizing natural polysaccharides as a base material is prepared by virtue of cycle freezing, and after a quantum dot precursor and TiO2 nano-composite hydrogel are blended, quantum dots prepared through in-situ radiation of electron beams can be uniformly assembled to the surface of nano-TiO2 to effectively modify and sensitize the surface of nano-TiO2, so as to form a hydrogel 'soft reactor' catalytic material in which a quantum dot/TiO2 composite is effectively loaded into a hydrogel skeleton. Due to the organic unification of adsorption, photocatalysis, antibiosis and sterilization, the hydrogel soft reactor which is excellent in mechanical strength, high in expansion response speed and shrinkage response speed, capable of easily loading catalysts and stable in performance can be obtained. The quantum dot/TiO2 nano-composite hydrogel 'soft reactor'catalytic material prepared by virtue of the in-situ radiation preparation method can be widely popularized and applied to the fields of environmental sewage treatment, photocatalysis, antibiosis, sterilization and the like.

Description

technical field [0001] The present invention relates to a quantum dot / TiO 2 A nanocomposite hydrogel soft reactor and an in-situ radiation preparation method thereof, particularly a method for in-situ preparation of quantum dots by ionizing radiation and effectively modifying a nano-TiO2 composite hydrogel "soft reactor". Background technique [0002] Nano TiO 2 Semiconductor oxides have attracted great attention in the field of photocatalytic reactions. When TiO 2 After the semiconductor absorbs light energy with energy greater than the forbidden band width, the electrons in the valence band are excited to the conduction band, and electron-hole pairs are generated. , Photoorganic synthesis, etc. Nano TiO 2 Small particle size, large specific surface, high surface energy, nanoparticles are easy to agglomerate; on the other hand, nano-TiO 2 The affinity with the matrix with low surface energy ratio is poor, and the two cannot be miscible when they are mixed with each ot...

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): B01J27/04B01J35/00A01N59/16A01P1/00A01P3/00
CPCA01N59/16B01J27/04B01J35/0013B01J35/004
Inventor 李月生韩炎秦江涛
Owner HUBEI UNIV OF 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