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Method for preparing metal-phosphorus alloy hollow microsphere

A technology of hollow microspheres and hollow spheres, which is applied in the preparation of microspheres and microcapsule preparations, and can solve the problems of poor controllability of the shell thickness of alloy hollow microspheres, high cost of core template particles, and harsh conditions

Active Publication Date: 2010-06-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hard template method refers to using hard particles such as silica microspheres, polystyrene microspheres or metal microspheres as a template, and then covering the template with a layer of target metal or alloy, and then use high-temperature heating, solvent dissolution, chemical corrosion, etc. to remove template particles to obtain alloy hollow microsphere materials. The hard template method in the prior art is complicated to operate and has harsh conditions, and the quality of alloy hollow microspheres is unstable.
[0004] In addition, the prior art also discloses a method of preparing alloy hollow microspheres by using expensive metallic silver particles as core template particles, and then taking advantage of the difference in reduction potential between metals to produce alloy hollow microspheres, but the cost of core template particles in this method is relatively high
Chinese patent document CN1293969C discloses a preparation method of nanoscale noble metal hollow spheres, which replaces metal silver particles with relatively cheap metal cobalt particles as template particles, but the deposition rate of metal or alloy on the template particles is difficult in this method. control, so the shell thickness of alloy hollow microspheres is poorly controllable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of polystyrene microspheres:

[0044] Take 7.5ml of styrene, 0.5g of polyvinylpyrrolidone, 0.15g of azobisisobutyronitrile, and 17.5ml of ethanol, mix the above raw materials evenly, heat to 70°C and react for 15 hours to obtain polyphenylene with a particle size of 850nm to 1100nm. Ethylene microspheres.

Embodiment 2

[0046] Take 20g of stannous chloride hydrate and add it to 1000ml of hydrochloric acid solution with a concentration of 0.1M, stir, and ultrasonically treat the stannous chloride for 30 minutes to dissolve the stannous chloride, then add tin particles to the solution, and leave the solution for 3 days for aging get a sensitizer;

[0047] Soak 60 mg of polystyrene microspheres prepared in Example 1 into the sensitization solution, ultrasonically treat for 1 hour, then filter, and wash the filtrate with absolute ethanol to obtain sensitized polystyrene microspheres;

[0048] Take 0.001 mole of palladium chloride and dissolve it in 1000ml of hydrochloric acid solution with a concentration of 0.1M as an activation solution; get the sensitized polystyrene particles and add them to the activation solution, stir for 30 minutes to activate the polystyrene Styrene microspheres;

[0049] Weighing 200 mg of chloroplatinic acid, 1.5 g of sodium phosphite and 200 mg of ethylenediamine mon...

Embodiment 3

[0053] Take 20g of stannous chloride hydrate and add it to 1000ml of hydrochloric acid solution with a concentration of 0.1M, stir, and ultrasonically treat the stannous chloride for 30 minutes to dissolve the stannous chloride, then add tin particles to the solution, and leave the solution for 3 days for aging get a sensitizer;

[0054] Soak 60 mg of polystyrene microspheres prepared in Example 1 into the sensitization solution, ultrasonically treat for 1 hour, then filter, and wash the filtrate with absolute ethanol to obtain sensitized polystyrene microspheres;

[0055] Take 0.001 mole of palladium chloride and dissolve it in 1000ml of hydrochloric acid solution with a concentration of 0.1M as an activation solution; get the sensitized polystyrene particles and add them to the activation solution, stir for 30 minutes to activate the polystyrene Styrene microspheres;

[0056] Weighing 200 mg of palladium chloride, 3.0 g of sodium phosphite and 550 mg of ethylenediamine mono...

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Abstract

The invention provides a method for preparing a metal-phosphorus alloy hollow microsphere, which comprises the following steps: performing sensitization treatment on a polystyrene microsphere by sensitizing solution containing stannous ions; adding the sensitized polystyrene microsphere into activating solution containing palladium ions for activation treatment; adding soluble noble metal salts, phosphite and a stabilizing agent into the activated activating solution to obtain mixed solution; heating the mixed solution to over 40 DEG C for plating reaction; filtering and drying a reaction product after the plating reaction; and removing the polystyrene microsphere in the reaction product to obtain the metal-phosphorus alloy hollow microsphere. Compared with a hard template method in the prior art, the method provided by the invention utilizes a chemical plating principle, has simple operation and is easy to control the thickness of a shell layer.

Description

technical field [0001] The invention relates to the field of inorganic material microspheres, in particular to a method for preparing metal-phosphorus alloy hollow microspheres. Background technique [0002] Hollow microsphere materials generally refer to shell-shaped hollow particles with a particle size distribution between tens of nanometers and tens of microns, and are a class of novel structural materials developed in recent years. Compared with solid solid particle materials, hollow microsphere materials are widely used in energy, gas sensing devices, catalysis and other industries because of their advantages such as high specific surface area, low density, good stability, and high surface permeability. [0003] In the prior art, according to template classification, the preparation methods of hollow microsphere materials can be divided into hard template method and soft template method. The soft template method refers to using a microemulsion system, a micelle system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 苏怡黄莉刘世伟李翠玲华凯峰吕翔宇王玉江
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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