Method for quickly synthesizing load type metal nano-particle

A technology of metal nanoparticles and synthetic loading, applied in the direction of non-metal elements, chemical instruments and methods, silicon compounds, etc., can solve the problems of catalyst blockage, reduce catalyst activity, time-consuming and other problems, and achieve the effect of inhibiting growth

Inactive Publication Date: 2018-07-24
AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] During the synthesis process of metal nanoparticles supported by mesoporous materials, due to the particularity of the pores, they are easily blocked by the catalyst, resulting in a large number of metal nanoparticles agglomerated on the surface of the molecular sieve, which reduces the activity of the catalyst.
In addition, the synthesis process of the traditional impregnation and calcination method takes a long time and consumes a lot of energy.

Method used

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  • Method for quickly synthesizing load type metal nano-particle
  • Method for quickly synthesizing load type metal nano-particle

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Add 1.2g of P123 into the dilute hydrochloric acid solution, stir until completely dissolved, then add 1.2g of n-butanol, stir in a constant temperature water bath at 35 ºC for 1 h, then add 2.58g of ethyl orthosilicate, and continue stirring for 24h, To obtain the mixed solution A, transfer the mixed solution A to a polytetrafluoroethylene reaction kettle, heat it in an oven at 100°C for 24 hours, after the reaction is completed and cool to room temperature, centrifuge the mixed solution to obtain a white product, and the product is obtained at 100°C Dry, wash the dried product with hydrochloric acid-ethanol mixed solution until neutral, then place the washed solid in a muffle furnace, raise the temperature to 550 ºC at a heating rate of 1 ºC / min, and keep it for 6 h , to prepare mesoporous silica material.

[0017] The mesoporous silica is baked in an oven to remove impurities adsorbed in the pores of the molecular sieve. A certain amount of 1-hexanol and chloroauric...

Embodiment 2

[0019] Add 1.2g of P123 into the dilute hydrochloric acid solution, stir until completely dissolved, then add 1.2g of n-butanol, stir in a constant temperature water bath at 35 ºC for 1 h, then add 2.58g of ethyl orthosilicate, and continue stirring for 24h, To obtain the mixed solution A, transfer the mixed solution A to a polytetrafluoroethylene reaction kettle, heat it in an oven at 100°C for 24 hours, after the reaction is completed and cool to room temperature, the mixed solution is centrifuged to obtain a white product, and the product is obtained at 100°C Dry, wash the dried product with hydrochloric acid-ethanol mixed solution until neutral, then place the washed solid in a muffle furnace, raise the temperature to 550 ºC at a heating rate of 1 ºC / min, and keep it for 6 h , to prepare mesoporous silica material. The mesoporous silica is baked in an oven to remove impurities adsorbed in the pores of the molecular sieve. A certain amount of 1-hexanol and chloroplatinic a...

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Abstract

The invention discloses a quick synthesis method for a load type metal nano-particle. The quick synthesis method is characterized in that a metal nano-particle precursor is adsorbed to enter a duct byutilizing capillary force under a negative-pressure environment of a mesoporous molecular sieve, and is matched with a microwave assisted alcohol thermal reduction method, so that the load type metalnano-particle which is highly and orderly dispersed is quickly obtained. The method can be used for synthesizing load type mesoporous molecular sieve catalysts of different metal content, has very strong potential application value, is simple and easy, and is beneficial for large-scale popularization.

Description

technical field [0001] The invention relates to a method for synthesizing supported metal nanoparticles, in particular to a method for rapidly synthesizing highly ordered dispersion of metal nanoparticles on a mesoporous molecular sieve carrier. Background technique [0002] Metal nanoparticles have attracted extensive attention in the field of catalysis due to their unique physical and chemical properties. For supported metal nanoparticle catalysts, the size and dispersion of metal nanoparticles are important factors affecting its catalytic performance, but as the size of metal nanoparticles decreases, agglomeration tends to occur, resulting in a decrease in its stability. Therefore, how to prepare high-dispersion and high-stability supported metal nanoparticle catalysts is one of the frontier topics in the field of catalysis. With the research and development of mesoporous materials in recent years, it has become an important method to study supported metal nanoparticle c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30
CPCB01J20/02B01J20/103
Inventor 陈昱贺克斌李维尊汤瑶黄磊鞠美庭
Owner AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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