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A kind of preparation method and catalytic application of nanocomposite material of ruthenium

A catalyst and nanoparticle technology, used in catalytic reactions, organic compound/hydride/coordination complex catalysts, preparation of sulfonic acid amides, etc.

Active Publication Date: 2019-04-16
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Preparation of homogeneously dispersed ultra-small metal nanoparticle catalysts using cucurbit rings and reduced graphene oxide as co-supports and protective agents has not been reported yet

Method used

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  • A kind of preparation method and catalytic application of nanocomposite material of ruthenium
  • A kind of preparation method and catalytic application of nanocomposite material of ruthenium
  • A kind of preparation method and catalytic application of nanocomposite material of ruthenium

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Experimental program
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Effect test

Embodiment 1

[0026] For the preparation of Ru / CB / rGO, 0.2 mL (0.1 mmol / mL) RuCl 3 Add the aqueous solution of 300mL deionized water, adjust its pH value to 7 with 0.1M aqueous sodium hydroxide solution; Body salt solution, stirred for 4 hours to a uniform suspension; 190mgNaBH 4 Dissolve in 200mL ethanol and quickly add it dropwise to the above suspension; keep stirring in a closed environment for 3 hours, then centrifuge, wash twice with water and once with ethanol. After drying, it was dispersed in ethanol, and the product was observed by transmission electron microscopy as ultra-small Ru nanoparticles (Ru / CB / rGO) with a diameter of 1.25±0.25nm and uniform dispersion. The result of plasma emission spectrometry (ICP) analysis showed that the Ru content was 2%.

Embodiment 2

[0028] 3mL (0.1mmol / mL) RuCl 3 Add the aqueous solution of 300mL deionized water, adjust its pH value to 7 with 0.1M aqueous sodium hydroxide solution; In the solution of body salt, after stirring for 4 hours, a uniform suspension was obtained; 2.85g NaBH 4 Dissolve in 400mL ethanol and quickly add it dropwise to the above suspension; keep stirring in a closed environment for 3 hours, then centrifuge, wash twice with water and once with ethanol. The result of ICP analysis showed that the Ru content was 30%.

Embodiment 3

[0030] All steps were the same as in Example 1, except that the six-membered melon ring was replaced by an eight-membered melon ring to obtain Ru / CB[8] / rGO, and the ICP analysis results showed that the Ru content was 12%.

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Abstract

The invention provides a method for synthesizing a metal ruthenium nanoparticle catalyst using melon rings and reduced graphene oxide as co-carriers, and applies the catalyst to the catalytic synthesis of aromatic sulfonamide compounds. The chemical components of the nanoparticle catalyst of the present invention are metal ruthenium, cucurbit and reduced graphene oxide. Melon rings and reduced graphene oxide are used as co-carriers. The electrostatic interaction and volume effect of melon rings effectively prevent the agglomeration of reduced graphene oxide, and the prepared ultra-small Ru nanoparticles are uniform and evenly dispersed. The nanoparticle catalyst prepared by the invention has excellent catalytic activity and stability, and can efficiently catalyze the reaction of sulfonamide and aromatic alcohol to prepare aromatic sulfonamide compounds. The catalyst can be reused many times without significant decrease in activity. This method has the characteristics of simple synthesis, convenient operation, wide application range, mild preparation conditions, simple method, no need for special equipment, and relatively low cost.

Description

technical field [0001] The invention relates to a method for synthesizing ultra-small ruthenium nanoparticles with uniform dispersion and uniform particle size by using melon rings and reduced graphene oxide as co-carriers. The reduced graphene oxide is intercalated by using the electrostatic interaction and the volume effect of the melon ring to obtain the reduced graphene oxide without agglomeration. Cucurbit rings and reduced graphene oxide are used as co-supports and protective agents to effectively limit the agglomeration and growth of ruthenium nanoparticles, resulting in ruthenium nanocatalysts with excellent performance in organic catalysis. The invention belongs to the field of catalytic materials. Background technique [0002] Efficient construction of new carbon-nitrogen bonds has always been a hot spot in the field of organocatalysis. Aromatic sulfonamide compounds containing carbon-nitrogen bonds are the basic building blocks of many drugs and organic light-em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C07C303/40C07C311/16
CPCC07C303/40B01J31/063B01J2231/4283B01J35/393B01J35/399C07C311/16
Inventor 吴冬霜曹荣曹敏纳
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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