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

A kind of hierarchical porous covalent organic polymer material and its preparation method and application

A polymer material, covalent organic technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of poor adsorption selectivity, slow adsorption rate of low-concentration mercury, etc., to enhance affinity and shorten synthesis Cycle, the effect of fast adsorption rate

Active Publication Date: 2022-04-26
CHINA UNIV OF GEOSCIENCES (BEIJING)
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to solve the problem that the existing adsorbent materials either have a slow adsorption rate for low-concentration mercury or have poor adsorption selectivity

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 hierarchical porous covalent organic polymer material and its preparation method and application
  • A kind of hierarchical porous covalent organic polymer material and its preparation method and application
  • A kind of hierarchical porous covalent organic polymer material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] A method for preparing a hierarchical porous covalent organic polymer material, comprising the following steps:

[0052] (1) Dissolve tetrakis-(4-aminobenzene)ethylene (ETTA) in water in a certain proportion, and add a certain amount of concentrated hydrochloric acid dropwise therein under ice-water bath conditions. The mixture was stirred for a certain time under an ice-water bath. Then, adding a certain concentration of NaNO 2 solution, the mixture was stirred for a certain period of time and then neutralized with NaOH solution to neutral and alkaline to obtain solution A;

[0053] The reaction process is:

[0054]

[0055] (2) Dissolving a certain amount of 1,4-phenyldithiol in a certain volume of NaOH solution, and ultrasonicating for a certain period of time to obtain solution B;

[0056] (3) Keep the ice-water bath condition, add solution B dropwise to solution A under stirring, and react the reaction system for a period of time under an inert gas environmen...

Embodiment 1

[0069] ETTA (0.25 mmol) was dissolved in water (25 mL), and 0.23 mL of concentrated hydrochloric acid was added dropwise thereto under ice-water bath conditions. The mixture was stirred for 15 minutes in an ice bath (0-5°C, 0°C was chosen). Then, keep adding 2.5mL NaNO at a rate of one drop every two seconds 2 (1.03 mmol) solution, the mixture was stirred for 30 minutes and then neutralized to pH=8.0 with 1M NaOH solution to obtain solution A. On the other hand, benzenedithiol (0.5 mmol) was dissolved in 10 mL of 0.1 M NaOH solution to obtain solution B. Solution B was sonicated for 20 min and then added dropwise to solution A with stirring at 0 °C. The reaction system was reacted under nitrogen atmosphere for 12 hours, washed with water and absolute ethanol for several times, and freeze-dried for 48 hours to obtain the target product hp-COP-SH.

[0070] like figure 1 As shown, it is a photo of hp-COP-SH, and the color of the sample is brownish red. The sample did not dis...

Embodiment 2

[0080] Carry out application test to hp-COP-SH material of the present invention:

[0081] (1) 10 mg of the hp-COP-SH sample prepared in Example 1 was added to a 30 mL Hg(II) concentration chamber of 30 ppb, Na + The concentration is 30ppm, K + Concentration is 80ppm, Ca 2+ , Mg 2+ 、Cu 2+ Concentration of 20ppm, Pb 2+ Concentration of 150ppb, pH = 6.5 ± 0.25 solution in the Erlenmeyer flask. Shake at a constant temperature in a water bath at 20°C for 10 minutes, take 5.00 mL and centrifuge, pass the supernatant through a 0.22 μm filter membrane, add 2% nitric acid to acidify and make the volume to 10.00 mL, and measure the concentration of various ions in the solution by ICP-MS. The result is multiplied by the dilution factor of 2 to obtain the actual concentration in the solution. In this way, the adsorption selectivity of hp-COP-SH to Hg(II) was evaluated.

[0082] like Figure 7 Shown are the separation factors and corresponding removal rates for different competing...

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
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a multi-level porous covalent organic polymer material and its preparation method and application, belonging to the technical field of material preparation and deep purification of drinking water. The covalent organic polymer is a two-dimensional network polymer, and its repeating unit is: the preparation method is to add concentrated hydrochloric acid dropwise to the ETTA aqueous solution under the condition of ice-water bath, and keep stirring for a certain period of time; NaNO 2 Solution, after stirring, use NaOH solution to neutralize to neutral and slightly alkaline to obtain solution A; 1,4-phenyldithiol is dissolved in NaOH solution and ultrasonically obtained solution B; add B dropwise under stirring condition into A; react under an inert atmosphere; wash the solid sample sequentially with water and organic solvent; freeze-dry the solid sample. The material can quickly and selectively adsorb low-concentration mercury in water, and has mild preparation conditions and good chemical stability.

Description

technical field [0001] The invention relates to a multi-level porous covalent organic polymer material and its preparation method and application, in particular to a multi-level porous covalent organic polymer material directly modified by mercapto groups that rapidly and selectively adsorb low-concentration mercury in water and its preparation method and applications, including tetra-(4-aminophenyl)ethylene (ETTA) and 1,4-phenyldithiol through the diazo coupling reaction to directly modify the hierarchical porous covalent organic polymer (hp-COP- The invention discloses a SH) material, a preparation method and the rapid and selective removal of low-concentration mercury in water by the material, belonging to the technical field of material preparation and deep purification of drinking water. Background technique [0002] Heavy metals have the characteristics of refractory biodegradation, high stability, accumulation, and high toxicity, and are an important class of pollutan...

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): C08G73/00B01J20/26C02F1/28C02F101/20C02F103/02
CPCC08G73/00B01J20/262C02F1/285C02F2101/20C02F2103/02
Inventor 郑红任雪莹师艳召张煜
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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