Bi-porous covalent organic framework material linked by imine bonds and preparation and application thereof

A technology of covalent organic skeleton and imine bond, applied in the field of porous materials, can solve the problems of low photocatalytic reduction of carbon dioxide, in the primary stage, etc., and achieve the effect of good carbon dioxide activation ability

Inactive Publication Date: 2019-08-23
HARBIN UNIV OF SCI & TECH
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Banerjee and Schwinghammer et al. have developed a series of covalent organic framework materials for photocatalytic water splitting to produce hydrogen. However, the research on photocatalytic carbon dioxide reduction through two-dimensional covalent organic framework materials is still in its infancy.
The photocatalytic carbon dioxide reduction efficiency of existing materials is not high, so in this case, the preparation of two-dimensional covalent organic framework materials with high specific surface area, high crystallinity, and good stability as a heterogeneous photocatalyst for the catalytic reduction of carbon dioxide is of great interest. extremely important

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
  • Bi-porous covalent organic framework material linked by imine bonds and preparation and application thereof
  • Bi-porous covalent organic framework material linked by imine bonds and preparation and application thereof
  • Bi-porous covalent organic framework material linked by imine bonds and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The method for preparing the above-mentioned covalent organic framework material linked by imine bonds is characterized in that it comprises the following steps:

[0023] (1) Add 3,3',5,5'-tetraformyl-4,4'-biphenyldiol, p-phenylenediamine, 1,4-dioxane and mesitylene to the vacuum tube in sequence . Sonicate at room temperature for 1 hour, add acetic acid after sonication, and perform three liquid nitrogen freezing and degassing operations to achieve a vacuum and oxygen-free environment.

[0024] (2) Put the vacuum tube processed in step (1) into an oven for reaction, raise the temperature of the oven to 120° C., and react at this temperature for 72 hours. The oven temperature was lowered to room temperature, and the crude product was obtained by filtration.

[0025] (3) Wash the obtained crude product with tetrahydrofuran until the filtrate is colorless, perform solvent exchange with acetone, and vacuum-dry at 100° C. for 24 hours to obtain a dark reddish-brown solid ...

Embodiment 1

[0031] 0.0447g (0.15mmol) 3,3',5,5'-tetraformyl-4,4'-diphenol, 0.0324g (0.3mmol) p-phenylenediamine, 1.5mL 1,4-diox Hexacyclone and 1.5 mL of 1,3,5-trimethylbenzene were sequentially added to the vacuum tube. Sonicate at room temperature for 1 hour. After sonication, use a pipette gun to accurately add 0.5 mL of acetic acid with a substance concentration of 1 M, and perform three liquid nitrogen freezing and degassing operations. The vacuum tube in a sealed state was put into an oven for reaction, and the temperature of the oven was raised to 120° C., and the reaction was carried out at this temperature for 72 hours. After the reaction, the temperature of the oven was lowered to room temperature, filtered, washed with tetrahydrofuran until the solution was clear and transparent, solvent exchanged with acetone, and vacuum-dried at 100°C for 24 hours to obtain 0.065 g of a dual-porous covalent organic framework material linked by imine bonds .

[0032] The infrared spectrum of...

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
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of covalent organic framework materials, in particular to a two-dimensional covalent organic framework material linked by imine bonds and a preparation method and use of the material. The structural unit of the material belongs to the hexagonal crystal system PM space group, the cell parameters are as follows: a is 30.7 A, b is 3.5 A, c is 30.7 A, alpha is 90 degrees, beta is 90 degrees, and gamma is 120 degrees. The material has regular hexagonal and triangular staggered hole-channels, and the aperture sizes are respectively 21 A and 9 A.

Description

technical field [0001] The invention belongs to the technical field of porous materials, and in particular relates to the preparation of an imine bonded double-hole covalent organic polymer material and its application in photocatalytic reduction of carbon dioxide. Background technique [0002] Continuous consumption of fossil fuels results in a large amount of greenhouse gas (mainly carbon dioxide) emissions, causing serious environmental problems, with the help of renewable energy, using the inexhaustible sunlight as a driving force to convert carbon dioxide into chemical fuels (carbon monoxide, Methanol, etc.) is one of the most attractive ways. Therefore, it is imminent to develop some photocatalysts with stable chemical structure, strong light-harvesting ability, efficient electron transport, and carbon dioxide adsorption and activation ability. [0003] Covalent organic frameworks are a class of crystalline porous polymers consisting of strong covalent bonds and conju...

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): C08G83/00B01J31/06C01B32/40
CPCB01J31/063B01J35/004B01J2231/62C08G83/008C01B32/40
Inventor 张凤鸣路阳杨延丁为民张洪语
Owner HARBIN 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