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A kind of supramolecular complex and its preparation method and application

A complex and supramolecular technology, applied in the direction of gold organic compounds, organic chemical methods, 1/11 group organic compounds without C-metal bonds, etc., can solve the problem of hindering the surface active sites of gold nanoparticles, affecting the catalytic activity and Stability, catalytic performance decline and other problems, to achieve the effect of superior carbon dioxide conversion carbon monoxide selectivity and stability, easy operation, large active sites

Active Publication Date: 2022-02-18
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smaller gold nanoparticles tend to agglomerate easily due to their large surface energy, which leads to a decrease in catalytic performance. Therefore, protective agents are often used to stabilize gold nanoparticles during the preparation of gold nanoparticles, such as long-chain organic molecules. Sodium citrate, etc., but because of the defects of these protective agents, on the one hand, they will seriously hinder the surface active sites of gold nanoparticles, and on the other hand, they will fall off during the catalytic process, which will affect the catalytic activity and stability.

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  • A kind of supramolecular complex and its preparation method and application
  • A kind of supramolecular complex and its preparation method and application
  • A kind of supramolecular complex and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Preparation method of Me10CB[5]-Au gold nanoparticle catalyst

[0085] (1) AuCl 4 Me 10 Preparation of CB[5] supramolecular complexes

[0086] (S1) Preparation of solution I: In a 250ml volumetric flask, 1.2g of decamethyl pentagua ring was dissolved in 250ml of water to obtain a 4.8 mg / mL decamethyl pentacucurium aqueous solution.

[0087] (S2) Preparation of solution II: 875 mg of Chlorauric acid Dissolve in 250ml deionized water to get 3.5mg / mL chlorine gold acid water solution.

[0088] (S3) Drop solution I and solution II into both ends of the H-shaped tube at a rate of 1 drop / second, so that they do not cross the bridge of the tube. The volume ratio of the two solutions is maintained at about 1:1. The solution is in contact with the liquid surface. Slowly place the H-type device on the stand and let it stand still for 72 hours. A large amount of yellow solids precipitate out. The obtained yellow solids are centrifuged and dried to obtain supramolecular c...

Embodiment 2

[0092] Preparation method of CB[6]-Au gold nanoparticle catalyst

[0093] (1) AuCl 4 Preparation of CB[6] supramolecular complexes

[0094] (S1) Preparation of solution I: In a 250ml volumetric flask, dissolve 1.245g of six-membered melon rings in 100ml of concentrated hydrochloric acid, and add deionized water to make the volume to 250ml.

[0095] (S2) Preparation of solution II: 875 mg of chloroauric acid was dissolved in 250 ml of deionized water to obtain an aqueous solution of chloroauric acid.

[0096] (S3) Add solution I and solution II to both ends of the H-shaped tube at a rate of 2 drops / second, and maintain the volume ratio of the two solutions at about 1:1, so that the two solutions do not pass through the cross bridge of the tube. liquid surface contact. Slowly place the H-type device on the stand and let it stand still for 72 hours. A large amount of yellow solid precipitates out. The obtained yellow solid is centrifuged and dried to obtain a supramolecular co...

Embodiment 3

[0100]Preparation method of CB[8]-Au gold nanoparticle catalyst

[0101] (1) AuCl 4 Preparation of CB[8] supramolecular complexes

[0102] (S1) Preparation of solution I: In a 250ml volumetric flask, add 1.66g of octa-membered melon rings dissolved in 100ml of concentrated hydrochloric acid, and add deionized water to make the volume to 250ml.

[0103] (S2) Preparation of solution II: 875 mg of chloroauric acid was dissolved in 250 ml of deionized water to obtain an aqueous solution of chloroauric acid.

[0104] (S3) Drop solution I and solution II into both ends of the H-shaped tube at a rate of 3 drops / second, and maintain the volume ratio of the two solutions at about 1:1, so that the two solutions do not pass through the cross bridge of the tube. liquid surface contact. Slowly place the H-type device on the stand and let it stand still for 72 hours, a large amount of yellow solid precipitates; the obtained yellow solid is centrifuged and dried to obtain a supramolecular...

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Abstract

The application discloses a supramolecular complex and its preparation method and application. The supramolecular complex chemical formula is shown in formula I: [(H 3 O) n M](AuQ 4 ) m ·rH 2 O formula I, wherein, n is selected from positive integers in 1 to 3; M has a melon ring structure; Q is a halogen element; m is 1 or 2; r represents the number of moles of free water per mole of the complex, 3≤r ≤25. The supramolecular complex uses the cucurbit ring compound as a protective agent to stabilize the gold nanoparticle without hindering the active sites on the surface of the nanomaterial, and has a good application prospect in the preparation of a gold nanoparticle catalyst.

Description

technical field [0001] The application relates to a supramolecular complex and its preparation method and application, belonging to the field of nanomaterial synthesis. Background technique [0002] Since the 21st century, with the increasing demand for energy and the aggravation of a series of environmental problems caused by the excessive use of fossil fuels, it is very important to find a sustainable energy conversion method. It is generally considered that the electrocatalytic carbon dioxide reduction reaction is the The best solution to balance the natural carbon cycle and mitigate the negative effects of excess carbon dioxide. However, due to the better stability of carbon dioxide molecules, CO2 electroreduction faces the challenges of high potential of the target product, slow kinetics and low selectivity. Therefore, catalysts with high activity and selectivity are urgently needed. [0003] While gold is among various alternative candidates, Au nanoparticles are one...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F1/12C25B1/23C25B11/085
CPCC07F1/005C25B1/00C07B2200/13
Inventor 曹荣曹敏纳宋现孟
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI