Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Au nanoparticle catalyst and preparation method thereof

A gold nanoparticle and catalyst technology, applied in the field of gold nanoparticle catalysts, can solve the problems of poor catalyst stability and increased nanoparticle size, and achieve the effects of stable performance, uniform distribution and small particle size

Active Publication Date: 2013-12-18
上海空猎环保科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wang et al. (Xiaohong Wang, et.al., Environ.Chem.Lett., 2011, 9, 185-189) loaded gold nanoparticles on Al 2 o 3 The catalyst prepared above can completely oxidize CO at 0°C or even lower temperature, but this catalyst has poor stability. They tried to improve the stability of the catalyst by adding Rh, but the size of the nanoparticles after the catalytic reaction was significantly increase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Au nanoparticle catalyst and preparation method thereof
  • Au nanoparticle catalyst and preparation method thereof
  • Au nanoparticle catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: see Figure 1 to Figure 3 , the preparation method of a gold nanoparticle catalyst of the present invention, it comprises the following steps:

[0034] (1) The silane compound with amino functional group is uniformly dispersed in the surfactant aqueous solution of 8-18wt% by mass percentage, so that the mass percentage of the silane compound with amino functional group is 5-15wt%, and then dilute acid Adjust the pH value of the mixed solution between 2 and 4, and react in a constant temperature water bath at 1 to 50°C for 18 to 72 hours, then centrifuge and filter the mixed solution, and wash it several times with deionized water and absolute ethanol , after vacuum drying for 12-48 hours, a two-dimensional silicon structure layered material with amino functional groups is obtained;

[0035] (2) Add the two-dimensional silicon structure layered material into absolute ethanol, and perform ultrasound to completely disperse the two-dimensional silicon structure ...

Embodiment 2

[0055] Embodiment 2: The gold nanocatalyst and preparation method thereof of the present embodiment are basically the same as embodiment 1, and its difference is: 3-aminopropyltrimethoxysilane is uniformly dispersed to 30mL mass percent and is 12wt% dodecane In an aqueous solution of sodium sulfate, make the mass percentage 10wt%, then adjust the pH value at 2.5 with dilute hydrochloric acid, react in a constant temperature water bath at 40°C for 24 hours, centrifuge, filter, wash with deionized water and absolute ethanol several times, and vacuum dry A two-dimensional silicon structure layered material is obtained.

[0056] Disperse the two-dimensional silicon structure layered material in 80mL absolute ethanol, its mass percentage is 1.5wt%, ultrasonic 40min makes it completely dispersed; Add the chloroauric acid solution in the ethanol solution of the two-dimensional silicon structure layered material, make chlorine The mass ratio of gold acid to the two-dimensional silicon...

Embodiment 3

[0058] Embodiment 3: The gold nanocatalyst of this embodiment and its preparation method are basically the same as Embodiment 1, 2, and its difference is: the 3-aminopropyltrimethoxysilane is uniformly dispersed to 25mL mass percent and is 9wt% ten In dialkyl sodium sulfate aqueous solution, make the mass percentage 6wt%, then adjust the pH value with dilute hydrochloric acid, react in a constant temperature water bath at 3, 4°C for 70h, centrifuge, filter, wash several times with deionized water and absolute ethanol, Vacuum drying to obtain a two-dimensional silicon structure layered material.

[0059] Disperse the two-dimensional silicon structure layered material in 40mL of absolute ethanol, its mass percentage is 0.2wt%, ultrasonic 1h makes it completely dispersed; Add the chloroauric acid solution in the ethanol solution of the two-dimensional silicon structure layered material, make chlorine The mass ratio of gold acid to the two-dimensional silicon structure layered mat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an Au nanoparticle catalyst and a preparation method of the Au nanoparticle catalyst. The active component of the catalyst is Au nanoparticles. The Au nanoparticles with the particle size of 1 to 10 nm are prepared by using nano-interlayer of a layered material with a two-dimensional Si structure as reaction space and using chloroauric acid as host material. The interlayer group and the space of the layered material with the two-dimensional Si structure can ensure small particle size and uniform distribution of the Au nanoparticles growing in the space, and can effectively inhibit further growth or agglomeration of the Au nanoparticle catalyst when in use. The catalyst contains 0.2wt% to 4.0wt% of Au nanoparticles. The catalyst prepared by the invention has high reaction activity for CO oxidation at low temperature, can be easily recovered after catalytic reaction, and has the advantages of high stability and durability.

Description

technical field [0001] The present invention relates to a gold catalyst, in particular to a method for preparing a gold nanoparticle catalyst using the nanolayer of a two-dimensional silicon structure layered material as a reaction space, and a gold nanoparticle catalyst prepared by the method, This catalyst can be used to eliminate carbon monoxide. Background technique [0002] With the progress of society, the emission of CO has increased year by year, and it has become the main pollutant in many environments, especially the deadly substance in the air of fire sites and mines. CO is a colorless, odorless, flammable, explosive, and harmful gas pollutant that can combine with hemoglobin in the human body to prevent hemoglobin from transporting oxygen to human organs. When CO reaches 10ppm in the air, it will be harmful to the human body, so how to remove CO pollution is one of the hotspots of social research today. [0003] In recent years, vehicle exhaust pollution has be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52B01D53/86B01D53/62
Inventor 施利毅张登松李红蕊
Owner 上海空猎环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com