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Method for loading metal organic skeleton structure with noble metal nano-particles

A metal-organic framework and nanoparticle technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problems of cumbersome operation steps and long preparation period.

Inactive Publication Date: 2019-03-19
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both methods have the disadvantages of cumbersome operation steps and long preparation period.

Method used

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  • Method for loading metal organic skeleton structure with noble metal nano-particles
  • Method for loading metal organic skeleton structure with noble metal nano-particles
  • Method for loading metal organic skeleton structure with noble metal nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of nanocomposite structures based on one-step method of loading noble metal nanoparticles in MOFs.

[0023] (1) By reducing Cu 2+ The method of hydroxy complexes to obtain cuprous oxide.

[0024] (2) Disperse cuprous oxide in N,N-dimethylacetamide (DMA) to form a 0.15mg / ml cuprous oxide DMA dispersion, and introduce a concentration of 80mM into the cuprous oxide DMA dispersion Trimellitic acid ethanol solution, and finally inject 100 microliters of 10mM chloroauric acid (HAuCl 4 ) ethanol solution, the mixed system was evenly mixed by shaking, and left to stand for 30 minutes. The obtained product was separated by centrifugation, washed 3 times with ethanol, and vacuum-dried at 50 degrees for 10 hours to obtain the MOFs nanocomposite structure supported by Au nanoparticles.

[0025] The scanning electron microscope picture of the reducing template cuprous oxide of the present embodiment is as follows figure 2 Shown; The scanning electron microscope pictu...

Embodiment 2

[0027] Preparation of nanocomposite structures based on one-step method of loading noble metal nanoparticles in MOFs.

[0028] (1) By reducing Cu 2+ The method of hydroxy complexes to obtain cuprous oxide.

[0029] (2) Disperse cuprous oxide in N,N-dimethylacetamide (DMA) to form a 0.15mg / ml cuprous oxide DMA dispersion, and introduce a concentration of 80mM into the cuprous oxide DMA dispersion Trimellitic acid ethanol solution, and finally inject 100 microliters of 10mM chloroplatinic acid (H 2 PtCl 6 ) ethanol solution, mix the mixed system evenly by shaking, and let it stand for 30 minutes. The obtained product is separated by centrifugation, washed 3 times with ethanol, and vacuum-dried at 50 degrees for 10 hours to obtain a Pt nanoparticle-loaded MOFs nanocomposite structure.

Embodiment 3

[0031] Preparation of nanocomposite structures based on one-step method of loading noble metal nanoparticles in MOFs.

[0032] (1) By reducing Cu 2+ The method of hydroxy complexes to obtain cuprous oxide.

[0033] (2) Disperse cuprous oxide in N,N-dimethylacetamide (DMA) to form a 0.15mg / ml cuprous oxide DMA dispersion, and introduce a concentration of 80mM into the cuprous oxide DMA dispersion Trimellitic acid ethanol solution, finally inject 100 microliters of 10mM potassium chloropalladate (H 2 PtCl 6 ) solution, mix the mixed system evenly by shaking, and let it stand for 30 minutes. The obtained product is separated by centrifugation, washed 3 times with ethanol, and vacuum-dried at 50°C for 10 hours to obtain a MOFs nanocomposite structure supported by Pd nanoparticles.

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Abstract

The invention relates to a method for loading a metal organic skeleton structure with noble metal nano-particles. The method comprises the following steps: with cuprous oxide as a reducing template, feeding cuprous oxide nano-crystals into a mixed solution of a noble metal precursor and an organic ligand; generating oxidation-reduction reaction by virtue of the noble metal precursor and cuprous oxide so as to generate noble metal nano-particles, and simultaneously coordinating Cu<2+> with the organic ligand so as to generate MOFs; and packaging the generated noble metal nano-particles with generated MOFs, so as to load MOFs with the noble metal nano-particles by virtue of a one-step method. According to the method, the loading of the noble metal nano-particles in MOFs is realized by virtueof the simple and rapid method, and the loading of different noble metal nano-particles in MOFs can be realized by only changing the noble metal precursor and the corresponding solvent. The method issuitable for preparing long-stability noble metal nano-particle composite catalyst and is applied to the catalytic chemical field.

Description

technical field [0001] The invention relates to a method for loading noble metal nanoparticles in a metal-organic framework structure, and belongs to the technical field of chemical synthesis and nanocomposite material preparation. Background technique [0002] Due to their unique physical and chemical properties, noble metal nanoparticles have been extensively studied as catalysts, and are widely used in catalytic chemical fields such as aromatization, isomerization, oxidation, dehydrogenation, and hydrogenation. However, noble metal nanoparticles tend to agglomerate and fuse, resulting in reduced activity. Loading noble metal nanoparticles on a carrier with a high specific surface area can effectively stabilize and disperse the noble metal nanoparticles, prevent the agglomeration and fusion of the noble metal nanoparticles, and keep them active for a long time. [0003] Metal-organic frameworks (MOFs) are a class of crystalline microporous materials, which are open framew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/28
CPCB01J31/26B01J31/28
Inventor 刘永鑫陈曦王珊赵一虎张严双鲁玉平吴小虎
Owner EAST CHINA JIAOTONG UNIVERSITY
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