Composite nanometer material with palladium coated with aluminum oxide and preparing method of composite nanometer material

A technology of composite nanomaterials and alumina, which is applied in the field of composite nanomaterials coated with alumina and palladium and its preparation, can solve the problems of easy "poisoning" of nano-Pd powder, cumbersome and complicated preparation methods, and inability to obtain products, and achieve production costs. low cost, simple preparation method and reasonable structure

Inactive Publication Date: 2016-04-13
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this catalyst has high catalytic activity, it still has shortcomings. First, the exposed nano-Pd powder is still very easy to "poison", which makes its service life shorter; second, the preparation method is cumbersome and time-consuming. Energy consumption, and products with high hydrogenation and polymerization service life cannot be obtained

Method used

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  • Composite nanometer material with palladium coated with aluminum oxide and preparing method of composite nanometer material
  • Composite nanometer material with palladium coated with aluminum oxide and preparing method of composite nanometer material
  • Composite nanometer material with palladium coated with aluminum oxide and preparing method of composite nanometer material

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Comparison scheme
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Embodiment 1

[0033] The concrete steps of preparation are:

[0034] Step 1, first place the palladium target in a stirred 0.01mol / L aluminum nitrate solution; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 1Hz, a pulse width of 15ns, and a power of 40mJ / pulse to irradiate the palladium target for 60min; wherein, the laser spot diameter is 0.5mm, and the emission wavelength is 532nm (or 1064nm ) laser is a Nd:YAG solid-state laser to obtain a mixed colloidal solution.

[0035] Step 2, the mixed colloidal solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotating speed is 1000r / min, and the time is 20min, and the washing process is to use deionized water or ethanol or Acetone washes the separated solid matter twice, the separation of solid matter during cleaning is centrifugation, an...

Embodiment 2

[0037] The concrete steps of preparation are:

[0038] Step 1, first place the palladium target in a 0.05mol / L aluminum nitrate solution under stirring; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 5Hz, a pulse width of 12.5ns, and a power of 60mJ / pulse to irradiate the palladium target for 50min; wherein, the laser spot diameter is 1mm, and the emission wavelength is 532nm (or 1064nm ) laser is a Nd:YAG solid-state laser to obtain a mixed colloidal solution.

[0039] Step 2, the mixed colloidal solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotating speed is 3000r / min, and the time is 15min, and the washing process is to use deionized water or ethanol or Acetone washes the separated solid matter twice, the separation of the solid matter during cleaning is centrif...

Embodiment 3

[0041] The concrete steps of preparation are:

[0042]Step 1, first place the palladium target in a 0.2 mol / L aluminum nitrate solution under stirring; wherein, the aluminum nitrate solution is an aqueous aluminum nitrate solution. Then use a laser with a wavelength of 532nm (or 1064nm), a repetition rate of 10Hz, a pulse width of 10ns, and a power of 80mJ / pulse to irradiate the palladium target for 40min; wherein, the laser spot diameter is 1.5mm, and the emission wavelength is 532nm (or 1064nm ) laser is a Nd:YAG solid-state laser to obtain a mixed colloidal solution.

[0043] Step 2, the solid-liquid separation, washing and drying of the mixed colloidal solution are carried out successively; wherein, the solid-liquid separation process is centrifugation, the rotating speed is 6000r / min, and the time is 10min, and the washing process is to use deionized water or ethanol or Acetone washes the separated solid matter three times. The separation of the solid matter during clean...

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Abstract

The invention discloses a composite nanometer material with palladium coated with aluminum oxide and a preparing method of the composite nanometer material. A nanometer particle two-dimensional chain serves as the material, and the particle size of nanometer particles forming the nanometer particle two-dimensional chain is 6-80 nm. The nanometer particle two-dimensional chain is formed by coating palladium nanometer particles with aluminum oxide, wherein the particle size of the palladium nanometer particles is 5-50 nm, and the thickness of an aluminum oxide layer is 1-30 nm. The method includes the steps that a palladium target material is put into a stirred aluminum nitrate solution, lasers with the wavelength being 532 nm or 1064 nm, the repetition frequency being 1-20 Hz, the pulse width being 5-15 ns and the power being 40-120 mJ / pulse are used for irradiating the palladium target material for at least 20 min, and a mixed colloidal solution is obtained; and afterwards, the mixed colloidal solution is subjected to solid-liquid separation, washing and drying in sequence, and a target product is prepared. The composite nanometer material is long in hydrogenation and polymerization reaction service life and high in structure stability and can be extremely easily and widely applied to the fields of hydrogenation and polymerization reactions, gas sensors and surface enhanced Raman scattering in a commercialized manner.

Description

technical field [0001] The invention relates to a composite nano material and a preparation method thereof, in particular to a composite nano material with aluminum oxide coated palladium and a preparation method thereof. Background technique [0002] As a metal, palladium (Pd) is an indispensable key material in high-tech fields such as aerospace and aviation, as well as in automobile manufacturing. In the field of nanomaterials, palladium is usually used as a catalyst and has important application value in the fields of gas sensing, photocatalysis, and electrochemistry. However, the practical application of palladium in various hydrogenation and polymerization reactions also has the problems of short service life and high regeneration frequency. To solve this problem, people have made unremitting efforts, such as in "nano-Pd / Al 2 o 3 Catalyst characterization and its selective hydrogenation reaction performance", "Acta Petroleum Sinica (Petroleum Processing)" in June 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02
CPCB22F9/24B22F1/17
Inventor 张洪文王莹莹蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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