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Preparation method of supported metal catalyst

A metal catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve problems such as aggregation and affecting catalyst effect, and achieve operational controllability High, efficient catalytic effect, low cost effect

Inactive Publication Date: 2016-05-11
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, nanoparticles have high surface energy, and are prone to aggregation during processing, which affects the catalyst effect.

Method used

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  • Preparation method of supported metal catalyst
  • Preparation method of supported metal catalyst
  • Preparation method of supported metal catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Dissolve 1g of montmorillonite in water to prepare an aqueous solution with a concentration of 1.0%. After ultrasonication for 2 hours, add 0.125g of DOPA. After DOPA is completely dissolved, add silver nitrate containing 0.125g of silver, react for 12 hours, and centrifuge to prepare the modified Nano-silver particles loaded on montmorillonite. Wherein, the mass ratio of nano-silver is 10.0%, the particle size is 5-100nm, and the mass ratio of montmorillonite to montmorillonite-loaded nano-silver particles is 80.0%. The mass ratio of DOPA in the montmorillonite-loaded silver nanoparticles was 10.0%.

Embodiment 2-6

[0033] Dissolve 1g of montmorillonite in water to prepare an aqueous solution with a concentration of 1.0%. After ultrasonication for 2 hours, add 0.011g of 3,4-dihydroxybenzylamine or 3,4-dihydroxybenzaldehyde or 3,4-dihydroxy Phenylacetaldehyde or 3,4-dihydroxybenzoic acid or 3,4-dihydroxyphenylacetic acid was added with chloroauric acid containing 0.1 g of gold, reacted for 12 hours, and centrifuged to prepare modified montmorillonite loaded nano silver particles. Wherein, the mass ratio of nano-gold is 9.0%, the particle size is 5-100nm, and the mass ratio of montmorillonite to montmorillonite-loaded nano-gold particles is 90.0%. The mass ratio of dopamine derivatives in the montmorillonite-loaded gold nanoparticles was 1.0%.

Embodiment 7-13

[0035] Dissolve 1g of montmorillonite in water to prepare an aqueous solution with a concentration of 1.0%. After ultrasonication for 2 hours, add 0.011g of 3,4-dihydroxybenzylamine or 3,4-dihydroxybenzaldehyde or 3,4-dihydroxy Phenylacetaldehyde or 3,4-dihydroxybenzoic acid or 3,4-dihydroxyphenylacetic acid with acetic acid-sodium acetate buffer or phosphate buffer or citric acid-sodium citrate buffer or disodium hydrogen phosphate-lemon Acid buffer solution or phthalic acid-hydrochloric acid buffer solution or boric acid-borax buffer solution or sodium carbonate-sodium bicarbonate buffer solution buffer solution to adjust the pH value, add silver nitrate containing 0.25g of silver, react for 1 hour, centrifuge and wash to prepare improved Nano-silver particles loaded on montmorillonite. Wherein, the mass ratio of nano-silver is 20%, the particle size is 5-100nm, and the mass ratio of montmorillonite to montmorillonite-loaded nano-silver particles is 79.0%. The mass ratio of...

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Abstract

The invention discloses a preparation method and application of a supported metal catalyst. The supported metal catalyst comprises carrier framework materials and nano particles, loaded on the surfaces of the carrier framework materials, of metal or metal oxide, or metal ions chelated on the surfaces of the carrier framework materials, wherein the metal ions and nano particles of the metal or metal oxide are loaded on the surfaces of the carrier framework materials through the polymerization layers, adhered to the surfaces of the carrier framework materials, of catechol derivatives. The preparation method of the supported metal catalyst has the advantages that the method is simple, various carrier framework materials are used, one or more metal ions or nano particles can be loaded, and universality is achieved; the supported metal catalyst is good in active metal dispersity, large in carrier specific surface area, low in use amount, low in cost, and the like; the catalyst loaded with noble metal is catalyst material which is widely used and environmental friendly and is efficiently applicable to environmental chemical engineering fields such as dye wastewater decoloring, wastewater organic pollutant removing, car tail gas treatment, air purification, hydrogenation and reforming catalytic reaction, gas sensors and fuel cells.

Description

technical field [0001] The invention relates to a preparation method that can be used for carrying metal catalysts on the surface of different carriers. The prepared metal catalysts can be widely used in environmental chemical fields such as pollutant removal in the environment, dye decolorization, automobile tail gas treatment, air purification and the like. Background technique [0002] At present, due to the important application of metal nanoparticles in the field of catalysis, many researchers are devoting their energy to the development of new catalysts, which involve energy and environmental governance and other important aspects related to the national economy and people's livelihood. The key to the catalytic effect of catalysts is the stability of catalysts, that is, the long-term use stability of catalyst nanoparticles. As we all know, nanoparticles have high surface energy, and are prone to aggregation during processing, which affects the catalyst effect. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J23/50B01J23/52
CPCB01J37/0203B01J23/50B01J23/52
Inventor 胡云霞王宁张宗仁刘中云周宗尧刘彩锋
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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