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Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate

A metal nanoparticle and alumina nanotechnology, which is applied in the field of preparation of nanostructured materials

Inactive Publication Date: 2011-05-04
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the preparation of hollow metal nanoparticles using γ-Al2O3 nanoparticles as a template

Method used

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  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate
  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate
  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First add 20mL of dry toluene to the reaction flask, then add 1.3mL of γ-mercaptopropyltriethoxysilane and 0.30g of γ-Al 2 o 3 Nanoparticles, ultrasonic dispersion, reflux reaction for 24 hours, repeated centrifugation / redispersion with absolute ethanol to clean the particles, and the obtained product was dried at 50°C. Then in 5 mL of anhydrous ethanol solution (0.0302 mol / L) of palladium acetylacetonate, add 0.18 g of the above-mentioned silanized γ-Al 2 o 3 Nanoparticles, ultrasonically dispersed, let stand for 30min, evaporate absolute ethanol to dryness at low temperature, then add to dioctyl ether and heat up to 260°C to dissolve Pd 2+ Reduction to metal Pd. Finally, add the above product into 20mL 40wt% HF solution at room temperature, ultrasonically disperse, and after standing for 24 hours, use deionized water and absolute ethanol to repeatedly centrifuge / redisperse and clean the nanoparticles, and the obtained particles are dried under vacuum at 50°C, that ...

Embodiment 2

[0017] According to the same procedure in Example 1, hollow palladium nanoparticles with a shell thickness of about 18 nm can be prepared by using a 0.0532 mol / L dehydrated ethanol solution of palladium acetylacetonate.

Embodiment 3

[0019] According to the same procedure in Example 1, hollow palladium nanoparticles with a shell thickness of about 3 nm can be prepared by using a 0.0079 mol / L dehydrated ethanol solution of palladium acetylacetonate.

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Abstract

The invention discloses a method for preparing hollow metal nanometer particles by using gamma-Al2O3 nanometer particles as templates. The method comprises the following steps that: firstly, a silane coupling agent is used to perform surface modification to the gamma-Al2O3 nanometer particles, then the gamma-Al2O3 nanometer particles are added into a palladium acetylacetonate solution or a chlorogold acid solution, and finally hollow palladium or gold nanometer particles are produced by using 40 wt% of HF solution to remove the gamma-Al2O3 nanometer particle templates. The method has the advantages that: the method takes the commercial gamma-Al2O3 nanometer particles as the templates; the surfaces of the gamma-Al2O3 nanometer particles are easy to modify with functional groups such as sulfhydryl groups or amidocyanogen and so on by the silane coupling agent; the method is easy to promote to the preparation of hollow nanometer materials of other materials; and the method does not need high temperature or rigorous chemical treatment during the removal of the templates, and has simple preparation process and easy operation.

Description

technical field [0001] The invention relates to the preparation of nanostructure materials, in particular to a method for preparing hollow metal nanoparticles by using gamma-alumina nanoparticles as templates. Background technique [0002] As a new type of nanomaterial with ordered structure, hollow nanoparticles have some unique properties such as low density, large specific surface area, good thermal stability and strong surface permeability, showing special functions that conventional materials do not have. Therefore, it is widely used in many fields such as drug sustained release, coatings, catalysis, chromatographic separation, micro-nano reactors, sensors, electronics and optoelectronic materials. [0003] At present, many ingenious methods have been developed to prepare hollow nanoparticles, such as template method, self-assembly method, hydrothermal method, sonochemical method, nozzle reactor method and so on. Among them, the template method is the most intuitive an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/00C09C3/12
Inventor 陈义旺黄忠福周魏华贺晓慧郭祖鹏
Owner NANCHANG UNIV
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